# v1.7

## Release v1.7.0 - 2019/08/20

### New feature

* buffer: Add file_single buffer
  https://github.com/fluent/fluentd/pull/2479

### Enhancement

* buffer: Improve the performance of buffer routine
  https://github.com/fluent/fluentd/pull/2560
  https://github.com/fluent/fluentd/pull/2563
  https://github.com/fluent/fluentd/pull/2564
* output: Use Mutext instead of Monitor
  https://github.com/fluent/fluentd/pull/2561
* event: Add `OneEvent#empty?` method
  https://github.com/fluent/fluentd/pull/2565
* thread: Set thread name for ruby 2.3 or later
  https://github.com/fluent/fluentd/pull/2574
* core: Cache msgpack packer/unpacker to avoid the object allocation
  https://github.com/fluent/fluentd/pull/2559
* time: Use faster way to get sec and nsec
  https://github.com/fluent/fluentd/pull/2557
* buf_file: Reduce IO flush by removing `IO#truncate`
  https://github.com/fluent/fluentd/pull/2551
* in_tcp: Improve the performance for multiple event case
  https://github.com/fluent/fluentd/pull/2567
* in_syslog: support `source_hostname_key` and `source_address_key` for unmatched event
  https://github.com/fluent/fluentd/pull/2553
* formatter_csv: Improve the format performance.
  https://github.com/fluent/fluentd/pull/2529
* parser_csv: Add fast parser for typical cases
  https://github.com/fluent/fluentd/pull/2535
* out_forward: Refactor code
  https://github.com/fluent/fluentd/pull/2516
  https://github.com/fluent/fluentd/pull/2532

### Bug fixes

* output: fix data lost on decompression
  https://github.com/fluent/fluentd/pull/2547
* out_exec_filter: fix non-ascii encoding issue
  https://github.com/fluent/fluentd/pull/2539
* in_tail: Don't call parser's configure twice
  https://github.com/fluent/fluentd/pull/2569
* Fix unused message handling for <section> parameters
  https://github.com/fluent/fluentd/pull/2578
* Fix comment/message typos
  https://github.com/fluent/fluentd/pull/2549
  https://github.com/fluent/fluentd/pull/2554
  https://github.com/fluent/fluentd/pull/2556
  https://github.com/fluent/fluentd/pull/2566
  https://github.com/fluent/fluentd/pull/2573
  https://github.com/fluent/fluentd/pull/2576
  https://github.com/fluent/fluentd/pull/2583

# v1.6

## Release v1.6.3 - 2019/07/29

### Enhancement

* in_syslog: Add `emit_unmatched_lines` parameter
  https://github.com/fluent/fluentd/pull/2499
* buf_file: Add `path_suffix` parameter
  https://github.com/fluent/fluentd/pull/2524
* in_tail: Improve the performance of split lines
  https://github.com/fluent/fluentd/pull/2527

### Bug fixes

* http_server: Fix re-define render_json method
  https://github.com/fluent/fluentd/pull/2517

## Release v1.6.2 - 2019/07/11

### Bug fixes

* http_server helper: Add title argument to support multiple servers
  https://github.com/fluent/fluentd/pull/2493

## Release v1.6.1 - 2019/07/10

### Enhancement

* socket/cert: Support all private keys OpenSSL supports, not only RSA.
  https://github.com/fluent/fluentd/pull/2487
* output/buffer: Improve statistics method performance
  https://github.com/fluent/fluentd/pull/2491

### Bug fixes

* plugin_config_formatter: update new doc URL
  https://github.com/fluent/fluentd/pull/2481
* out_forward: Avoid zero division error when there are no available nodes
  https://github.com/fluent/fluentd/pull/2482

## Release v1.6.0 - 2019/07/01

### New feature

* plugin: Add http_server helper and in_monitor_agent use it
  https://github.com/fluent/fluentd/pull/2447

### Enhancement

* in_monitor_agent: Add more metrics for buffer/output
  https://github.com/fluent/fluentd/pull/2450
* time/plugin: Add `EventTime#to_time` method for fast conversion
  https://github.com/fluent/fluentd/pull/2469
* socket helper/out_forward: Add connect_timeout parameter
  https://github.com/fluent/fluentd/pull/2467
* command: Add `--conf-encoding` option
  https://github.com/fluent/fluentd/pull/2453
* parser_none: Small performance optimization
  https://github.com/fluent/fluentd/pull/2455

### Bug fixes

* cert: Fix cert match pattern
  https://github.com/fluent/fluentd/pull/2466
* output: Fix forget to increment rollback count
  https://github.com/fluent/fluentd/pull/2462

# v1.5

## Release v1.5.2 - 2019/06/13

### Bug fixes

* out_forward: Fix duplicated handshake bug in keepalive
  https://github.com/fluent/fluentd/pull/2456

## Release v1.5.1 - 2019/06/05

### Enhancement

* in_tail: Increase read block size to reduce IO call
  https://github.com/fluent/fluentd/pull/2418
* in_monitor_agent: Refactor code
  https://github.com/fluent/fluentd/pull/2422

### Bug fixes

* out_forward: Fix socket handling of keepalive
  https://github.com/fluent/fluentd/pull/2434
* parser: Fix the use of name based timezone
  https://github.com/fluent/fluentd/pull/2421
* in_monitor_agent: Fix debug parameter handling
  https://github.com/fluent/fluentd/pull/2423
* command: Fix error handling of log rotation age option
  https://github.com/fluent/fluentd/pull/2427
* command: Fix ERB warning for ruby 2.6 or later
  https://github.com/fluent/fluentd/pull/2430

## Release v1.5.0 - 2019/05/18

### New feature

* out_forward: Support keepalive feature
  https://github.com/fluent/fluentd/pull/2393
* in_http: Support TLS via server helper
  https://github.com/fluent/fluentd/pull/2395
* in_syslog: Support TLS via server helper
  https://github.com/fluent/fluentd/pull/2399

### Enhancement

* in_syslog: Add delimiter parameter
  https://github.com/fluent/fluentd/pull/2378
* in_forward: Add tag/add_tag_prefix parameters
  https://github.com/fluent/fluentd/pull/2396
* parser_json: Add stream_buffer_size parameter for yajl
  https://github.com/fluent/fluentd/pull/2381
* command: Add deprecated message to show-plugin-config option
  https://github.com/fluent/fluentd/pull/2401
* storage_local: Ignore empty file. Call sync after write for XFS.
  https://github.com/fluent/fluentd/pull/2409

### Bug fixes

* out_forward: Don't use SO_LINGER on SSL/TLS WinSock
  https://github.com/fluent/fluentd/pull/2398
* server helper: Fix recursive lock issue in TLSServer
  https://github.com/fluent/fluentd/pull/2341
* Fix typo
  https://github.com/fluent/fluentd/pull/2369

# v1.4

## Release v1.4.2 - 2019/04/02

### Enhancements

* in_http: subdomain support in CORS domain
  https://github.com/fluent/fluentd/pull/2337
* in_monitor_agent: Expose current timekey list as a buffer metrics
  https://github.com/fluent/fluentd/pull/2343
* in_tcp/in_udp: Add source_address_key parameter
  https://github.com/fluent/fluentd/pull/2347
* in_forward: Add send_keepalive_packet parameter to check the remote connection is available or not
  https://github.com/fluent/fluentd/pull/2352

### Bug fixes

* out_exec_filter: Fix typo of child_respawn description
  https://github.com/fluent/fluentd/pull/2341
* in_tail: Create parent directories for symlink
  https://github.com/fluent/fluentd/pull/2353
* in_tail: Fix encoding duplication check for non-specified case
  https://github.com/fluent/fluentd/pull/2361
* log: Fix time format handling of plugin logger when log format is JSON
  https://github.com/fluent/fluentd/pull/2356

## Release v1.4.1 - 2019/03/18

### Enhancements

* system: Add worker_id to process_name when workers is larger than 1
  https://github.com/fluent/fluentd/pull/2321
* parser_regexp: Check named captures. When no named captures, configuration error is raised
  https://github.com/fluent/fluentd/pull/2331

### Bug fixes

* out_forward: Make tls_client_private_key_passphrase secret
  https://github.com/fluent/fluentd/pull/2324
* in_syslog: Check message length when read from buffer in octet counting
  https://github.com/fluent/fluentd/pull/2323

## Release v1.4.0 - 2019/02/24

### New features

* multiprocess: Support <worker N-M> syntax
  https://github.com/fluent/fluentd/pull/2292
* output: Work <secondary> and retry_forever together
  https://github.com/fluent/fluentd/pull/2276
* out_file: Support placeholders in symlink_path
  https://github.com/fluent/fluentd/pull/2254

### Enhancements

* output: Add MessagePack unpacker error to unrecoverable error list
  https://github.com/fluent/fluentd/pull/2301
* output: Reduce flush delay when large timekey and small timekey_wait are specified
  https://github.com/fluent/fluentd/pull/2291
* config: Support embedded ruby code in section argument.
  https://github.com/fluent/fluentd/pull/2295
* in_tail: Improve encoding parameter handling
  https://github.com/fluent/fluentd/pull/2305
* in_tcp/in_udp: Add <parse> section check
  https://github.com/fluent/fluentd/pull/2267

### Bug fixes

* server: Ignore IOError and related errors in UDP
  https://github.com/fluent/fluentd/pull/2310
* server: Ignore EPIPE in TLS accept to avoid fluentd restart
  https://github.com/fluent/fluentd/pull/2253

# v1.3

## Release v1.3.3 - 2019/01/06

### Enhancements

* parser_syslog: Use String#squeeze for performance improvement
  https://github.com/fluent/fluentd/pull/2239
* parser_syslog: Support RFC5424 timestamp without subseconds
  https://github.com/fluent/fluentd/pull/2240

### Bug fixes

* server: Ignore ECONNRESET in TLS accept to avoid fluentd restart
  https://github.com/fluent/fluentd/pull/2243
* log: Fix plugin logger ignores fluentd log event setting
  https://github.com/fluent/fluentd/pull/2252

## Release v1.3.2 - 2018/12/10

### Enhancements

* out_forward: Support mutual TLS
  https://github.com/fluent/fluentd/pull/2187
* out_file: Create `pos_file` directory if it doesn't exist
  https://github.com/fluent/fluentd/pull/2223

### Bug fixes

* output: Fix logs during retry
  https://github.com/fluent/fluentd/pull/2203

## Release v1.3.1 - 2018/11/27

### Enhancements

* out_forward: Separate parameter names for certificate
  https://github.com/fluent/fluentd/pull/2181
  https://github.com/fluent/fluentd/pull/2190
* out_forward: Add `verify_connection_at_startup` parameter to check connection setting at startup phase
  https://github.com/fluent/fluentd/pull/2184
* config: Check right slash position in regexp type
  https://github.com/fluent/fluentd/pull/2176
* parser_nginx: Support multiple IPs in `http_x_forwarded_for` field
  https://github.com/fluent/fluentd/pull/2171

### Bug fixes

* fluent-cat: Fix retry limit handling
  https://github.com/fluent/fluentd/pull/2193
* record_accessor helper: Delete top level field with bracket style
  https://github.com/fluent/fluentd/pull/2192
* filter_record_transformer: Keep `class` methond to avoid undefined method error
  https://github.com/fluent/fluentd/pull/2186

## Release v1.3.0 - 2018/11/10

### New features

* output: Change thread execution control
  https://github.com/fluent/fluentd/pull/2170
* in_syslog: Support octet counting frame
  https://github.com/fluent/fluentd/pull/2147
* Use `flush_thread_count` value for `queued_chunks_limit_size` when `queued_chunks_limit_size` is not specified
  https://github.com/fluent/fluentd/pull/2173

### Enhancements

* output: Show backtrace for unrecoverable errors
  https://github.com/fluent/fluentd/pull/2149
* in_http: Implement support for CORS preflight requests
  https://github.com/fluent/fluentd/pull/2144

### Bug fixes

* server: Fix deadlock between on_writable and close in sockets
  https://github.com/fluent/fluentd/pull/2165
* output: show correct error when wrong plugin is specified for secondary
  https://github.com/fluent/fluentd/pull/2169

# v1.2

## Release v1.2.6 - 2018/10/03

### Enhancements

* output: Add `disable_chunk_backup` for ignore broken chunks.
  https://github.com/fluent/fluentd/pull/2117
* parser_syslog: Improve regexp for RFC5424
  https://github.com/fluent/fluentd/pull/2141
* in_http: Allow specifying the wildcard '*' as the CORS domain
  https://github.com/fluent/fluentd/pull/2139

### Bug fixes

* in_tail: Prevent thread switching in the interval between seek and read/write operations to pos_file
  https://github.com/fluent/fluentd/pull/2118
* parser: Handle LoadError properly for oj
  https://github.com/fluent/fluentd/pull/2140

## Release v1.2.5 - 2018/08/22

### Bug fixes

* in_tail: Fix resource leak by file rotation
  https://github.com/fluent/fluentd/pull/2105
* fix typos

## Release v1.2.4 - 2018/08/01

### Bug fixes

* output: Consider timezone when calculate timekey
  https://github.com/fluent/fluentd/pull/2054
* output: Fix bug in suppress_emit_error_log_interval
  https://github.com/fluent/fluentd/pull/2069
* server-helper: Fix connection leak by close timing issue.
  https://github.com/fluent/fluentd/pull/2087

## Release v1.2.3 - 2018/07/10

### Enhancements

* in_http: Consider `<parse>` parameters in batch mode
  https://github.com/fluent/fluentd/pull/2055
* in_http: Support gzip payload
  https://github.com/fluent/fluentd/pull/2060
* output: Improve compress performance
  https://github.com/fluent/fluentd/pull/2031
* in_monitor_agent: Add missing descriptions for configurable options
  https://github.com/fluent/fluentd/pull/2037
* parser_syslog: update regex of pid field for conformance to RFC5424 spec
  https://github.com/fluent/fluentd/pull/2051

### Bug fixes

* in_tail: Fix to rescue Errno::ENOENT for File.mtime()
  https://github.com/fluent/fluentd/pull/2063
* fluent-plugin-generate: Fix Parser plugin template
  https://github.com/fluent/fluentd/pull/2026
* fluent-plugin-config-format: Fix NoMethodError for some plugins
  https://github.com/fluent/fluentd/pull/2023
* config: Don't warn message for reserved parameters in DSL
  https://github.com/fluent/fluentd/pull/2034

## Release v1.2.2 - 2018/06/12

### Enhancements

* filter_parser: Add remove_key_name_field parameter
  https://github.com/fluent/fluentd/pull/2012
* fluent-plugin-config-format: Dump config_argument
  https://github.com/fluent/fluentd/pull/2003

### Bug fixes

* in_tail: Change pos file entry handling to avoid read conflict for other plugins
  https://github.com/fluent/fluentd/pull/1963
* buffer: Wait for all chunks being purged before deleting @queued_num items
  https://github.com/fluent/fluentd/pull/2016

## Release v1.2.1 - 2018/05/23

### Enhancements

* Counter: Add wait API to client
  https://github.com/fluent/fluentd/pull/1997

### Bug fixes

* in_tcp/in_udp: Fix source_hostname_key to set hostname correctly
  https://github.com/fluent/fluentd/pull/1976
* in_monitor_agent: Fix buffer_total_queued_size calculation
  https://github.com/fluent/fluentd/pull/1990
* out_file: Temporal fix for broken gzipped files with gzip and append
  https://github.com/fluent/fluentd/pull/1995
* test: Fix unstable backup test
  https://github.com/fluent/fluentd/pull/1979
* gemspec: Remove deprecated has_rdoc

## Release v1.2.0 - 2018/04/30

### New Features

* New Counter API
  https://github.com/fluent/fluentd/pull/1857
* output: Backup for broken chunks
  https://github.com/fluent/fluentd/pull/1952
* filter_grep: Support for `<and>` and `<or>` sections
  https://github.com/fluent/fluentd/pull/1897
* config: Support `regexp` type in configuration parameter
  https://github.com/fluent/fluentd/pull/1927

### Enhancements

* parser_nginx: Support optional `http-x-forwarded-for` field
  https://github.com/fluent/fluentd/pull/1932
* filter_grep: Improve the performance
  https://github.com/fluent/fluentd/pull/1940

### Bug fixes

* log: Fix unexpected implementation bug when log rotation setting is applied
  https://github.com/fluent/fluentd/pull/1957
* server helper: Close invalid socket when ssl error happens on reading
  https://github.com/fluent/fluentd/pull/1942
* output: Buffer chunk's unique id should be formatted as hex in the log

# v1.1

## Release v1.1.3 - 2018/04/03

### Enhancements

* output: Support negative index for tag placeholders
  https://github.com/fluent/fluentd/pull/1908
* buffer: Add queued_chunks_limit_size to control the number of queued chunks
  https://github.com/fluent/fluentd/pull/1916
* time: Make Fluent::EventTime human readable for inspect
  https://github.com/fluent/fluentd/pull/1915

### Bug fixes

* output: Delete empty queued_num field after purging chunks
  https://github.com/fluent/fluentd/pull/1919
* fluent-debug: Fix usage message of fluent-debug command
  https://github.com/fluent/fluentd/pull/1920
* out_forward: The node should be disabled when TLS socket for ack returns an error
  https://github.com/fluent/fluentd/pull/1925

## Release v1.1.2 - 2018/03/18

### Enhancements

* filter_grep: Support pattern starts with character classes with //
  https://github.com/fluent/fluentd/pull/1887

### Bug fixes

* in_tail: Handle records in the correct order on file rotation
  https://github.com/fluent/fluentd/pull/1880
* out_forward: Fix race condition with `<security>` on multi thread environment
  https://github.com/fluent/fluentd/pull/1893
* output: Prevent flushing threads consume too much CPU when retry happens
  https://github.com/fluent/fluentd/pull/1901
* config: Fix boolean param handling for comment without value
  https://github.com/fluent/fluentd/pull/1883
* test: Fix random test failures in test/plugin/test_out_forward.rb
  https://github.com/fluent/fluentd/pull/1881
  https://github.com/fluent/fluentd/pull/1890
* command: Fix typo in binlog_reader
  https://github.com/fluent/fluentd/pull/1898

## Release v1.1.1 - 2018/03/05

### Enhancements

* in_debug_agent: Support multi worker environment
  https://github.com/fluent/fluentd/pull/1869
* in_forward: Improve SSL setup to support mutual TLS
  https://github.com/fluent/fluentd/pull/1861
* buf_file: Skip and delete broken file chunks to avoid unsuccessful retry in resume
  https://github.com/fluent/fluentd/pull/1874
* command: Show fluentd version for debug purpose
  https://github.com/fluent/fluentd/pull/1839

### Bug fixes

* in_forward: Do not close connection until write is complete on failed auth PONG
  https://github.com/fluent/fluentd/pull/1835
* in_tail: Fix IO event race condition during shutdown
  https://github.com/fluent/fluentd/pull/1876
* in_http: Emit event time instead of raw time value in batch
  https://github.com/fluent/fluentd/pull/1850
* parser_json: Add EncodingError to rescue list for oj 3.x.
  https://github.com/fluent/fluentd/pull/1875
* config: Fix config_param for string type with frozen string
  https://github.com/fluent/fluentd/pull/1838
* timer: Fix a bug to leak non-repeating timer watchers
  https://github.com/fluent/fluentd/pull/1864

## Release v1.1.0 - 2018/01/17

### New features / Enhancements

* config: Add hostname and worker_id short-cut
  https://github.com/fluent/fluentd/pull/1814
* parser_ltsv: Add delimiter_pattern parameter
  https://github.com/fluent/fluentd/pull/1802
* record_accessor helper: Support nested field deletion
  https://github.com/fluent/fluentd/pull/1800
* record_accessor helper: Expose internal instance `@keys` variable
  https://github.com/fluent/fluentd/pull/1808
* log: Improve Log#on_xxx API performance
  https://github.com/fluent/fluentd/pull/1809
* time: Improve time formatting performance
  https://github.com/fluent/fluentd/pull/1796
* command: Port certificates generating command from secure-forward
  https://github.com/fluent/fluentd/pull/1818

### Bug fixes

* server helper: Fix TCP + TLS degradation
  https://github.com/fluent/fluentd/pull/1805
* time: Fix the method for TimeFormatter#call
  https://github.com/fluent/fluentd/pull/1813
  
# v1.0

## Release v1.0.2 - 2017/12/17

### New features / Enhancements

* Use dig_rb instead of ruby_dig to support dig method in more objects
  https://github.com/fluent/fluentd/pull/1794

## Release v1.0.1 - 2017/12/14

### New features / Enhancements

* in_udp: Add receive_buffer_size parameter
  https://github.com/fluent/fluentd/pull/1788
* in_tail: Add enable_stat_watcher option to disable inotify events
  https://github.com/fluent/fluentd/pull/1775
* Relax strptime gem version

### Bug fixes

* in_tail: Properly handle moved back and truncated case
  https://github.com/fluent/fluentd/pull/1793
* out_forward: Rebuild weight array to apply server setting properly
  https://github.com/fluent/fluentd/pull/1784
* fluent-plugin-config-formatter: Use v1.0 for URL
  https://github.com/fluent/fluentd/pull/1781

## Release v1.0.0 - 2017/12/6

See [CNCF announcment](https://www.cncf.io/blog/2017/12/06/fluentd-v1-0/) :)

### New features / Enhancements

* out_copy: Support ignore_error argument in `<store>`
  https://github.com/fluent/fluentd/pull/1764
* server helper: Improve resource usage of TLS transport
  https://github.com/fluent/fluentd/pull/1764
* Disable tracepoint feature to omit unnecessary insts
  https://github.com/fluent/fluentd/pull/1764

### Bug fixes

* out_forward: Don't update retry state when failed to get ack response.
  https://github.com/fluent/fluentd/pull/1686
* plugin: Combine before_shutdown and shutdown call in one sequence.
  https://github.com/fluent/fluentd/pull/1763
* Add description to parsers
  https://github.com/fluent/fluentd/pull/1776
  https://github.com/fluent/fluentd/pull/1777
  https://github.com/fluent/fluentd/pull/1778
  https://github.com/fluent/fluentd/pull/1779
  https://github.com/fluent/fluentd/pull/1780
* filter_parser: Add parameter description
  https://github.com/fluent/fluentd/pull/1773
* plugin: Combine before_shutdown and shutdown call in one sequence.
  https://github.com/fluent/fluentd/pull/1763

# v0.14

## Release v0.14.25 - 2017/11/29

### New features / Enhancements

* Disable tracepoint feature to omit unnecessary insts
  https://github.com/fluent/fluentd/pull/1764

### Bug fixes

* out_forward: Don't update retry state when failed to get ack response.
  https://github.com/fluent/fluentd/pull/1686
* plugin: Combine before_shutdown and shutdown call in one sequence.
  https://github.com/fluent/fluentd/pull/1763

## Release v0.14.24 - 2017/11/24

### New features / Enhancements

* plugin-config-formatter: Add link to plugin helper result
  https://github.com/fluent/fluentd/pull/1753
* server helper: Refactor code
  https://github.com/fluent/fluentd/pull/1759

### Bug fixes

* supervisor: Don't call change_privilege twice
  https://github.com/fluent/fluentd/pull/1757

## Release v0.14.23 - 2017/11/15

### New features / Enhancements

* in_udp: Add remove_newline parameter
  https://github.com/fluent/fluentd/pull/1747

### Bug fixes

* buffer: Lock buffers in order of metadata
  https://github.com/fluent/fluentd/pull/1722
* in_tcp: Fix log corruption under load.
  https://github.com/fluent/fluentd/pull/1729
* out_forward: Fix elapsed time miscalculation in tcp heartbeat
  https://github.com/fluent/fluentd/pull/1738
* supervisor: Fix worker pid handling during worker restart
  https://github.com/fluent/fluentd/pull/1739
* in_tail: Skip setup failed watcher to avoid resource leak and log bloat
  https://github.com/fluent/fluentd/pull/1742
* agent: Add error location to emit error logs
  https://github.com/fluent/fluentd/pull/1746
* command: Consider hyphen and underscore in fluent-plugin-generate arguments
  https://github.com/fluent/fluentd/pull/1751

## Release v0.14.22 - 2017/11/01

### New features / Enhancements

* formatter_tsv: Add add_newline parameter
  https://github.com/fluent/fluentd/pull/1691
* out_file/out_secondary_file: Support ${chunk_id} placeholder. This includes extrace_placeholders API change
  https://github.com/fluent/fluentd/pull/1708
* record_accessor: Support double quotes in bracket notation
  https://github.com/fluent/fluentd/pull/1716
* log: Show running ruby version in startup log
  https://github.com/fluent/fluentd/pull/1717
* log: Log message when chunk is created
  https://github.com/fluent/fluentd/pull/1718
* in_tail: Add pos_file duplication check
  https://github.com/fluent/fluentd/pull/1720

### Bug fixes

* parser_apache2: Delay time parser initialization
  https://github.com/fluent/fluentd/pull/1690
* cert_option: Improve generated certificates' conformance to X.509 specification 
  https://github.com/fluent/fluentd/pull/1714
* buffer: Always lock chunks first to avoid deadlock
  https://github.com/fluent/fluentd/pull/1721

## Release v0.14.21 - 2017/09/07

### New features / Enhancements

* filter_parser: Support record_accessor in key_name
  https://github.com/fluent/fluentd/pull/1654
* buffer: Support record_accessor in chunk keys
  https://github.com/fluent/fluentd/pull/1662

### Bug fixes

* compat_parameters: Support all syslog parser parameters
  https://github.com/fluent/fluentd/pull/1650
* filter_record_transformer: Don't create new keys if the original record doesn't have `keep_keys` keys
  https://github.com/fluent/fluentd/pull/1663
* in_tail: Fix the error when 'tag *' is configured
  https://github.com/fluent/fluentd/pull/1664
* supervisor: Clear previous worker pids when receive kill signals.
  https://github.com/fluent/fluentd/pull/1683

## Release v0.14.20 - 2017/07/31

### New features / Enhancements

* plugin: Add record_accessor plugin helper
  https://github.com/fluent/fluentd/pull/1637
* log: Add format and time_format parameters to `<system>` setting
  https://github.com/fluent/fluentd/pull/1644

### Bug fixes

* buf_file: Improve file handling to mitigate broken meta file
  https://github.com/fluent/fluentd/pull/1628
* in_syslog: Fix the description of resolve_hostname parameter
  https://github.com/fluent/fluentd/pull/1633
* process: Fix signal handling. Send signal to all workers
  https://github.com/fluent/fluentd/pull/1642
* output: Fix error message typo
  https://github.com/fluent/fluentd/pull/1643

## Release v0.14.19 - 2017/07/12

### New features / Enhancements

* in_syslog: More characters are available in tag part of syslog format
  https://github.com/fluent/fluentd/pull/1610
* in_syslog: Add resolve_hostname parameter
  https://github.com/fluent/fluentd/pull/1616
* filter_grep: Support new configuration format by config_section
  https://github.com/fluent/fluentd/pull/1611

### Bug fixes

* output: Fix race condition of retry state in flush thread
  https://github.com/fluent/fluentd/pull/1623
* test: Fix typo in test_in_tail.rb
  https://github.com/fluent/fluentd/pull/1622

## Release v0.14.18 - 2017/06/21

### New features / Enhancements

* parser: Add rfc5424 regex without priority
  https://github.com/fluent/fluentd/pull/1600

### Bug fixes

* in_tail: Fix timing issue that the excluded_path doesn't apply.
  https://github.com/fluent/fluentd/pull/1597
* config: Fix broken UTF-8 encoded configuration file handling
  https://github.com/fluent/fluentd/pull/1592
* out_forward: Don't stop heartbeat when error happen
  https://github.com/fluent/fluentd/pull/1602
* Fix command name typo in plugin template
  https://github.com/fluent/fluentd/pull/1603

## Release v0.14.17 - 2017/05/29

### New features / Enhancements

* in_tail: Add ignore_repeated_permission_error
  https://github.com/fluent/fluentd/pull/1574
* server: Accept private key for TLS server without passphrase
  https://github.com/fluent/fluentd/pull/1575
* config: Validate workers option on standalone mode
  https://github.com/fluent/fluentd/pull/1577

### Bug fixes

* config: Mask all secret parameters in worker section
  https://github.com/fluent/fluentd/pull/1580
* out_forward: Fix ack handling
  https://github.com/fluent/fluentd/pull/1581
* plugin-config-format: Fix markdown format generator
  https://github.com/fluent/fluentd/pull/1585

## Release v0.14.16 - 2017/05/13

### New features / Enhancements

* config: Allow null byte in double-quoted string
  https://github.com/fluent/fluentd/pull/1552
* parser: Support %iso8601 special case for time_format
  https://github.com/fluent/fluentd/pull/1562

### Bug fixes

* out_forward: Call proper method for each connection type
  https://github.com/fluent/fluentd/pull/1560
* in_monitor_agent: check variable buffer is a Buffer instance
  https://github.com/fluent/fluentd/pull/1556
* log: Add missing '<<' method to delegators
  https://github.com/fluent/fluentd/pull/1558
* command: uninitialized constant Fluent::Engine in fluent-binlog-reader
  https://github.com/fluent/fluentd/pull/1568

## Release v0.14.15 - 2017/04/23

### New features / Enhancements

* Add `<worker N>` directive
  https://github.com/fluent/fluentd/pull/1507
* in_tail: Do not warn that directories are unreadable in the in_tail plugin
  https://github.com/fluent/fluentd/pull/1540
* output: Add formatted_to_msgpack_binary? to Output plugin API
  https://github.com/fluent/fluentd/pull/1547
* windows: Allow the Windows Service name Fluentd runs as to be configurable
  https://github.com/fluent/fluentd/pull/1548

### Bug fixes

* in_http: Fix X-Forwarded-For header handling. Accpet multiple headers
  https://github.com/fluent/fluentd/pull/1535
* Fix backward compatibility with Fluent::DetachProcess and Fluent::DetachMultiProcess
  https://github.com/fluent/fluentd/pull/1522
* fix typo
  https://github.com/fluent/fluentd/pull/1521
  https://github.com/fluent/fluentd/pull/1523
  https://github.com/fluent/fluentd/pull/1544
* test: Fix out_file test with timezone
  https://github.com/fluent/fluentd/pull/1546
* windows: Quote the file path to the Ruby bin directory when starting fluentd as a windows service
  https://github.com/fluent/fluentd/pull/1536

## Release v0.14.14 - 2017/03/23

### New features / Enhancements

* in_http: Support 'application/msgpack` header
  https://github.com/fluent/fluentd/pull/1498
* in_udp: Add message_length_limit parameter for parameter name consistency with in_syslog
  https://github.com/fluent/fluentd/pull/1515
* in_monitor_agent: Start one HTTP server per worker on sequential port numbers
  https://github.com/fluent/fluentd/pull/1493
* in_tail: Skip the refresh of watching list on startup
  https://github.com/fluent/fluentd/pull/1487
* filter_parser: filter_parser: Add emit_invalid_record_to_error parameter
  https://github.com/fluent/fluentd/pull/1494
* parser_syslog: Support RFC5424 syslog format
  https://github.com/fluent/fluentd/pull/1492
* parser: Allow escape sequence in Apache access log
  https://github.com/fluent/fluentd/pull/1479
* config: Add actual value in the placholder error message
  https://github.com/fluent/fluentd/pull/1497
* log: Add Fluent::Log#<< to support some SDKs
  https://github.com/fluent/fluentd/pull/1478

### Bug fixes

* Fix cleanup resource
  https://github.com/fluent/fluentd/pull/1483
* config: Set encoding forcefully to avoid UndefinedConversionError
  https://github.com/fluent/fluentd/pull/1477
* Fix Input and Output deadlock when buffer is full during startup
  https://github.com/fluent/fluentd/pull/1502
* config: Fix log_level handling in `<system>`
  https://github.com/fluent/fluentd/pull/1501
* Fix typo in root agent error log
  https://github.com/fluent/fluentd/pull/1491
* storage: Fix a bug storage_create cannot accept hash as `conf` keyword argument
  https://github.com/fluent/fluentd/pull/1482

## Release v0.14.13 - 2017/02/17

### New features / Enhancements

* in_tail: Add 'limit_recently_modified' to limit watch files.
  https://github.com/fluent/fluentd/pull/1474
* configuration: Improve 'flush_interval' handling for better message and backward compatibility
  https://github.com/fluent/fluentd/pull/1442
* command: Add 'fluent-plugin-generate' command
  https://github.com/fluent/fluentd/pull/1427
* output: Skip record when 'Output#format' returns nil
  https://github.com/fluent/fluentd/pull/1469

### Bug fixes

* output: Secondary calculation should consider 'retry_max_times'
  https://github.com/fluent/fluentd/pull/1452
* Fix regression of deprecated 'process' module
  https://github.com/fluent/fluentd/pull/1443
* Fix missing parser_regex require
  https://github.com/fluent/fluentd/issues/1458
  https://github.com/fluent/fluentd/pull/1453
* Keep 'Fluent::BufferQueueLimitError' for existing plugins
  https://github.com/fluent/fluentd/pull/1456
* in_tail: Untracked files should be removed from watching list to avoid memory bloat
  https://github.com/fluent/fluentd/pull/1467
* in_tail: directories should be skipped when the ** pattern is used
  https://github.com/fluent/fluentd/pull/1464
* record_transformer: Revert "Use BasicObject for cleanroom" for `enable_ruby` regression.
  https://github.com/fluent/fluentd/pull/1461
* buf_file: handle "Too many open files" error to keep buffer and metadata pair
  https://github.com/fluent/fluentd/pull/1468

## Release v0.14.12 - 2017/01/30

### New features / Enhancements
* Support multi process workers by `workers` option
  https://github.com/fluent/fluentd/pull/1386
* Support TLS transport security layer by server plugin helper, and forward input/output plugins
  https://github.com/fluent/fluentd/pull/1423
* Update internal log event handling to route log events to `@FLUENT_LOG` label if configured, suppress log events in startup/shutdown in default
  https://github.com/fluent/fluentd/pull/1405
* Rename buffer plugin chunk limit parameters for consistency
  https://github.com/fluent/fluentd/pull/1412
* Encode string values from configuration files in UTF8
  https://github.com/fluent/fluentd/pull/1411
* Reorder plugin load paths to load rubygem plugins earlier than built-in plugins to overwrite them
  https://github.com/fluent/fluentd/pull/1410
* Clock API to control internal thread control
  https://github.com/fluent/fluentd/pull/1425
* Validate `config_param` options to restrict unexpected specifications
  https://github.com/fluent/fluentd/pull/1437
* formatter: Add `add_newline` option to get formatted lines without newlines
  https://github.com/fluent/fluentd/pull/1420
* in_forward: Add `ignore_network_errors_at_startup` option for automated cluster deployment
  https://github.com/fluent/fluentd/pull/1399
* in_forward: Close listening socket in #stop, not to accept new connection request in early stage of shutdown
  https://github.com/fluent/fluentd/pull/1401
* out_forward: Ensure to pack values in `str` type of msgpack
  https://github.com/fluent/fluentd/pull/1413
* in_tail: Add `emit_unmatched_lines` to capture lines which unmatch configured regular expressions
  https://github.com/fluent/fluentd/pull/1421
* in_tail: Add `open_on_every_update` to read lines from files opened in exclusive mode on Windows platform
  https://github.com/fluent/fluentd/pull/1409
* in_monitor_agent: Add `with_ivars` query parameter to get instance variables only for specified instance variables
  https://github.com/fluent/fluentd/pull/1393
* storage_local: Generate file store path using `usage`, with `root_dir` configuration
  https://github.com/fluent/fluentd/pull/1438
* Improve test stability
  https://github.com/fluent/fluentd/pull/1426

### Bug fixes
* Fix bug to ignore command line options: `--rpc-endpoint`, `--suppress-config-dump`, etc
  https://github.com/fluent/fluentd/pull/1398
* Fix bug to block infinitely in shutdown when buffer is full and `overflow_action` is `block`
  https://github.com/fluent/fluentd/pull/1396
* buf_file: Fix bug not to use `root_dir` even if configured correctly
  https://github.com/fluent/fluentd/pull/1417
* filter_record_transformer: Fix to use BasicObject for clean room
  https://github.com/fluent/fluentd/pull/1415
* filter_record_transformer: Fix bug that `remove_keys` doesn't work with `renew_time_key`
  https://github.com/fluent/fluentd/pull/1433
* in_monitor_agent: Fix bug to crash with NoMethodError for some output plugins
  https://github.com/fluent/fluentd/pull/1365

## Release v0.14.11 - 2016/12/26

### New features / Enhancements
* Add "root_dir" parameter in `<system>` directive to configure server root directory, used for buffer/storage paths
  https://github.com/fluent/fluentd/pull/1374
* Fix not to restart Fluentd processes when unrecoverable errors occur
  https://github.com/fluent/fluentd/pull/1359
* Show warnings in log when output flush operation takes longer time than threshold
  https://github.com/fluent/fluentd/pull/1370
* formatter_csv: Raise configuration error when no field names are specified
  https://github.com/fluent/fluentd/pull/1369
* in_syslog: Update implementation to use plugin helpers
  https://github.com/fluent/fluentd/pull/1382
* in_forward: Add a configuration parameter "source_address_key"
  https://github.com/fluent/fluentd/pull/1382
* in_monitor_agent: Add a parameter "include_retry" to get detail retry status
  https://github.com/fluent/fluentd/pull/1387
* Add Ruby 2.4 into supported ruby versions

### Bug fixes
* Fix to set process name of supervisor process
  https://github.com/fluent/fluentd/pull/1380
* in_forward: Fix a bug not to handle "require_ack_response" correctly
  https://github.com/fluent/fluentd/pull/1389


## Release v0.14.10 - 2016/12/14

### New features / Enhancement

* Add socket/server plugin helper to write TCP/UDP clients/servers as Fluentd plugin
  https://github.com/fluent/fluentd/pull/1312
  https://github.com/fluent/fluentd/pull/1350
  https://github.com/fluent/fluentd/pull/1356
  https://github.com/fluent/fluentd/pull/1362
* Fix to raise errors when injected hostname is also specified as chunk key
  https://github.com/fluent/fluentd/pull/1357
* in_tail: Optimize to read lines from file
  https://github.com/fluent/fluentd/pull/1325
* in_monitor_agent: Add new parameter "include_config"(default: true)
  https://github.com/fluent/fluentd/pull/1317
* in_syslog: Add "priority_key" and "facility_key" options
  https://github.com/fluent/fluentd/pull/1351
* filter_record_transformer: Remove obsoleted syntax like "${message}" and not to dump records in logs
  https://github.com/fluent/fluentd/pull/1328
* Add an option "--time-as-integer" to fluent-cat command to send events from v0.14 fluent-cat to v0.12 fluentd
  https://github.com/fluent/fluentd/pull/1349

### Bug fixes

* Specify correct Oj options for newer versions (Oj 2.18.0 or later)
  https://github.com/fluent/fluentd/pull/1331
* TimeSlice output plugins (in v0.12 style) raise errors when "utc" parameter is specified
  https://github.com/fluent/fluentd/pull/1319
* Parser plugins cannot use options for regular expressions
  https://github.com/fluent/fluentd/pull/1326
* Fix bugs not to raise errors to use logger in v0.12 plugins
  https://github.com/fluent/fluentd/pull/1344
  https://github.com/fluent/fluentd/pull/1332
* Fix bug about shutting down Fluentd in Windows
  https://github.com/fluent/fluentd/pull/1367
* in_tail: Close files explicitly in tests
  https://github.com/fluent/fluentd/pull/1327
* out_forward: Fix bug not to convert buffer configurations into v0.14 parameters
  https://github.com/fluent/fluentd/pull/1337
* out_forward: Fix bug to raise error when "expire_dns_cache" is specified
  https://github.com/fluent/fluentd/pull/1346
* out_file: Fix bug to raise error about buffer chunking when it's configured as secondary
  https://github.com/fluent/fluentd/pull/1338

## Release v0.14.9 - 2016/11/15

### New features / Enhancement

* filter_parser: Port fluent-plugin-parser into built-in plugin
  https://github.com/fluent/fluentd/pull/1191
* parser/formatter plugin helpers with default @type in plugin side
  https://github.com/fluent/fluentd/pull/1267
* parser: Reconstruct Parser related classes
  https://github.com/fluent/fluentd/pull/1286
* filter_record_transformer: Remove old behaviours
  https://github.com/fluent/fluentd/pull/1311
* Migrate some built-in plugins into v0.14 API
  https://github.com/fluent/fluentd/pull/1257 (out_file)
  https://github.com/fluent/fluentd/pull/1297 (out_exec, out_exec_filter)
  https://github.com/fluent/fluentd/pull/1306 (in_forward, out_forward)
  https://github.com/fluent/fluentd/pull/1308 (in_http)
* test: Improve test drivers
  https://github.com/fluent/fluentd/pull/1302
  https://github.com/fluent/fluentd/pull/1305

### Bug fixes

* log: Avoid name conflict between Fluent::Logger
  https://github.com/fluent/fluentd/pull/1274
* fluent-cat: Fix fluent-cat command to send sub-second precision time
  https://github.com/fluent/fluentd/pull/1277
* config: Fix a bug not to overwrite default value with nil
  https://github.com/fluent/fluentd/pull/1296
* output: Fix timezone for compat timesliced output plugins
  https://github.com/fluent/fluentd/pull/1307
* out_forward: fix not to raise error when out_forward is initialized as secondary
  https://github.com/fluent/fluentd/pull/1313
* output: Event router for secondary output
  https://github.com/fluent/fluentd/pull/1283
* test: fix to return the block value as expected by many rubyists
  https://github.com/fluent/fluentd/pull/1284

## Release v0.14.8 - 2016/10/13

### Bug fixes

* Add msgpack_each to buffer chunks in compat-layer output plugins
  https://github.com/fluent/fluentd/pull/1273

## Release v0.14.7 - 2016/10/07

### New features / Enhancement

* Support data compression in buffer plugins
  https://github.com/fluent/fluentd/pull/1172
* in_forward: support to transfer compressed data
  https://github.com/fluent/fluentd/pull/1179
* out_stdout: fix to show nanosecond resolution time
  https://github.com/fluent/fluentd/pull/1249
* Add option to rotate Fluentd daemon's log
  https://github.com/fluent/fluentd/pull/1235
* Add extract plugin helper, with symmetric time parameter support in parser/formatter and inject/extract
  https://github.com/fluent/fluentd/pull/1207
* Add a feature to parse/format numeric time (unix time [+ subsecond value])
  https://github.com/fluent/fluentd/pull/1254
* Raise configuration errors for inconsistent `<label>` configurations
  https://github.com/fluent/fluentd/pull/1233
* Fix to instantiate an unconfigured section even for multi: true
  https://github.com/fluent/fluentd/pull/1210
* Add validators of placeholders for buffering key extraction
  https://github.com/fluent/fluentd/pull/1255
* Fix to show log messages about filter optimization only when needed
  https://github.com/fluent/fluentd/pull/1227
* Add some features to write plugins more easily
  https://github.com/fluent/fluentd/pull/1256
* Add a tool to load dumped events from file
  https://github.com/fluent/fluentd/pull/1165

### Bug fixes

* Fix Oj's default option to encode/decode JSON in the same way with Yajl
  https://github.com/fluent/fluentd/pull/1147
  https://github.com/fluent/fluentd/pull/1239
* Fix to raise correct configuration errors
  https://github.com/fluent/fluentd/pull/1223
* Fix a bug to call `shutdown` method (and some others) twice
  https://github.com/fluent/fluentd/pull/1242
* Fix to enable `chunk.each` only when it's encoded by msgpack
  https://github.com/fluent/fluentd/pull/1263
* Fix a bug not to stop enqueue/flush threads correctly
  https://github.com/fluent/fluentd/pull/1264
* out_forward: fix a bug that UDP heartbeat doesn't work
  https://github.com/fluent/fluentd/pull/1238
* out_file: fix a crash bug when v0.14 enables symlink and resumes existing buffer file chunk generated by v0.12
  https://github.com/fluent/fluentd/pull/1234
* in_monitor_agent: fix compatibility problem between outputs of v0.12 and v0.14
  https://github.com/fluent/fluentd/pull/1232
* in_tail: fix a bug to crash to read large amount logs
  https://github.com/fluent/fluentd/pull/1259
  https://github.com/fluent/fluentd/pull/1261

## Release v0.14.6 - 2016/09/07

### Bug fixes

* in_tail: Add a missing parser_multiline require
  https://github.com/fluent/fluentd/pull/1212
* forward: Mark secret parameters of forward plugins as secret
  https://github.com/fluent/fluentd/pull/1209

## Release v0.14.5 - 2016/09/06

### New features / Enhancement

* Add authentication / authorization feature to forward protocol and in/out_forward plugins
  https://github.com/fluent/fluentd/pull/1136
* Add a new plugin to dump buffers in retries as secondary plugin
  https://github.com/fluent/fluentd/pull/1154
* Merge out_buffered_stdout and out_buffered_null into out_stdout and out_null
  https://github.com/fluent/fluentd/pull/1200

### Bug fixes

* Raise configuration errors to clarify what's wrong when "@type" is missing
  https://github.com/fluent/fluentd/pull/1202
* Fix the bug not to launch Fluentd when v0.12 MultiOutput plugin is configured
  https://github.com/fluent/fluentd/pull/1206

## Release v0.14.4 - 2016/08/31

### New features / Enhancement

* Add a method to Filter API to update time of events
  https://github.com/fluent/fluentd/pull/1140
* Improve performance of filter pipeline
  https://github.com/fluent/fluentd/pull/1145
* Fix to suppress not to warn about different plugins for primary and secondary without any problems
  https://github.com/fluent/fluentd/pull/1153
* Add deprecated/obsoleted options to config_param to show removed/warned parameters
  https://github.com/fluent/fluentd/pull/1186
* in_forward: Add a feature source_hostname_key to inject source hostname into records
  https://github.com/fluent/fluentd/pull/807
* in_tail: Add a feature from_encoding to specify both encoding from and to
  https://github.com/fluent/fluentd/pull/1067
* filter_record_transformer: Fix to prevent overwriting reserved placeholder keys
  https://github.com/fluent/fluentd/pull/1176
* Migrate some build-in plugins into v0.14 API
  https://github.com/fluent/fluentd/pull/1149
  https://github.com/fluent/fluentd/pull/1151
* Update dependencies
  https://github.com/fluent/fluentd/pull/1193

### Bug fixes

* Fix to start/stop/restart Fluentd processes correctly on Windows environment
  https://github.com/fluent/fluentd/pull/1171
  https://github.com/fluent/fluentd/pull/1192
* Fix to handle Windows events correctly in winsvc.rb
  https://github.com/fluent/fluentd/pull/1155
  https://github.com/fluent/fluentd/pull/1170
* Fix not to continue to restart workers for configuration errors
  https://github.com/fluent/fluentd/pull/1183
* Fix output threads to start enqueue/flush buffers until plugins' start method ends
  https://github.com/fluent/fluentd/pull/1190
* Fix a bug not to set umask 0
  https://github.com/fluent/fluentd/pull/1152
* Fix resource leak on one-shot timers
  https://github.com/fluent/fluentd/pull/1178
* Fix to call plugin helper methods in configure
  https://github.com/fluent/fluentd/pull/1184
* Fix a bug to count event size
  https://github.com/fluent/fluentd/pull/1164/files
* Fix to require missed compat modules
  https://github.com/fluent/fluentd/pull/1168
* Fix to start properly for plugins under MultiOutput
  https://github.com/fluent/fluentd/pull/1167
* Fix test drivers to set class name into plugin instances
  https://github.com/fluent/fluentd/pull/1069
* Fix tests not to use mocks for Time (improve test stabilization)
  https://github.com/fluent/fluentd/pull/1194

## Release 0.14.3 - 2016/08/30

* Fix the dependency for ServerEngine 1.x

## Release 0.14.2 - 2016/08/09

### New features / Enhancement

* Fix to split large event stream into some/many chunks in buffers
  https://github.com/fluent/fluentd/pull/1062
* Add parser and filter support in compat_parameters plugin helper
  https://github.com/fluent/fluentd/pull/1079
* Add a RPC call to flush buffers and stop workers
  https://github.com/fluent/fluentd/pull/1134
* Update forward protocol to pass the number of events in a payload
  https://github.com/fluent/fluentd/pull/1137
* Improve performance of some built-in formatter plugins
  https://github.com/fluent/fluentd/pull/1082
  https://github.com/fluent/fluentd/pull/1086
* Migrate some built-in plugins and plugin util modules into v0.14 API
  https://github.com/fluent/fluentd/pull/1058
  https://github.com/fluent/fluentd/pull/1061
  https://github.com/fluent/fluentd/pull/1076
  https://github.com/fluent/fluentd/pull/1078
  https://github.com/fluent/fluentd/pull/1081
  https://github.com/fluent/fluentd/pull/1083
  https://github.com/fluent/fluentd/pull/1091
* Register RegExpParser as a parser plugin explicitly
  https://github.com/fluent/fluentd/pull/1094
* Add delimiter option to CSV parser
  https://github.com/fluent/fluentd/pull/1108
* Add an option to receive longer udp syslog messages
  https://github.com/fluent/fluentd/pull/1127
* Add a option to suspend internal status in dummy plugin
  https://github.com/fluent/fluentd/pull/900
* Add a feature to capture filtered records in test driver for Filter plugins
  https://github.com/fluent/fluentd/pull/1077
* Add some utility methods to plugin test drivers
  https://github.com/fluent/fluentd/pull/1114

### Bug fixes

* Fix bug to read non buffer-chunk files as buffer chunks when Fluentd resumed
  https://github.com/fluent/fluentd/pull/1124
* Fix bug not to load Filter plugins which are specified in configurations
  https://github.com/fluent/fluentd/pull/1118
* Fix bug to ignore `-p` option to specify directories of plugins
  https://github.com/fluent/fluentd/pull/1133
* Fix bug to overwrite base class configuration section definitions by subclasses
  https://github.com/fluent/fluentd/pull/1119
* Fix to stop Fluentd worker process by Ctrl-C when --no-supervisor specified
  https://github.com/fluent/fluentd/pull/1089
* Fix regression about RPC call to reload configuration
  https://github.com/fluent/fluentd/pull/1093
* Specify to ensure Oj JSON parser to use strict mode
  https://github.com/fluent/fluentd/pull/1147
* Fix unexisting path handling in Windows environment
  https://github.com/fluent/fluentd/pull/1104

## Release 0.14.1 - 2016/06/30

### New features / Enhancement

* Add plugin helpers for parsers and formatters
  https://github.com/fluent/fluentd/pull/1023
* Extract some mixins into compat modules
  https://github.com/fluent/fluentd/pull/1044
  https://github.com/fluent/fluentd/pull/1052
* Add utility methods for tests and test drivers
  https://github.com/fluent/fluentd/pull/1047
* Migrate some built-in plugins to v0.14 APIs
  https://github.com/fluent/fluentd/pull/1049
  https://github.com/fluent/fluentd/pull/1057
  https://github.com/fluent/fluentd/pull/1060
  https://github.com/fluent/fluentd/pull/1064
* Add support of X-Forwarded-For header in in_http plugin
  https://github.com/fluent/fluentd/pull/1051
* Warn not to create too many staged chunks at configure
  https://github.com/fluent/fluentd/pull/1054
* Add a plugin helper to inject tag/time/hostname
  https://github.com/fluent/fluentd/pull/1063

### Bug fixes

* Fix in_monitor_agent for v0.14 plugins
  https://github.com/fluent/fluentd/pull/1003
* Fix to call #format_stream of plugins themselves when RecordFilter mixin included
  https://github.com/fluent/fluentd/pull/1005
* Fix shutdown sequence to wait force flush
  https://github.com/fluent/fluentd/pull/1009
* Fix a deadlock bug in shutdown
  https://github.com/fluent/fluentd/pull/1010
* Fix to require DetachProcessMixin in default for compat plugins
  https://github.com/fluent/fluentd/pull/1014
* Fix to overwrite configure_proxy name only for root sections for debugging
  https://github.com/fluent/fluentd/pull/1015
* Rename file for in_unix plugin
  https://github.com/fluent/fluentd/pull/1017
* Fix a bug not to create pid file when daemonized
  https://github.com/fluent/fluentd/pull/1021
* Fix wrong DEFAULT_PLUGIN_PATH
  https://github.com/fluent/fluentd/pull/1028
* Fix a bug not to use primary plugin type for secondary in default
  https://github.com/fluent/fluentd/pull/1032
* Add --run-worker option to distinguish to run as worker without supervisor
  https://github.com/fluent/fluentd/pull/1033
* Fix regression of fluent-debug command
  https://github.com/fluent/fluentd/pull/1046
* Update windows-pr dependency to 1.2.5
  https://github.com/fluent/fluentd/pull/1065
* Fix supervisor to pass RUBYOPT to worker processes
  https://github.com/fluent/fluentd/pull/1066

## Release 0.14.0 - 2016/05/25

### New features / Enhancement

This list includes changes of 0.14.0.pre.1 and release candidates.

* Update supported Ruby version to 2.1 or later
  https://github.com/fluent/fluentd/pull/692
* Sub-second event time support
  https://github.com/fluent/fluentd/pull/653
* Windows support and supervisor improvement
  https://github.com/fluent/fluentd/pull/674
  https://github.com/fluent/fluentd/pull/831
  https://github.com/fluent/fluentd/pull/880
* Add New plugin API
  https://github.com/fluent/fluentd/pull/800
  https://github.com/fluent/fluentd/pull/843
  https://github.com/fluent/fluentd/pull/866
  https://github.com/fluent/fluentd/pull/905
  https://github.com/fluent/fluentd/pull/906
  https://github.com/fluent/fluentd/pull/917
  https://github.com/fluent/fluentd/pull/928
  https://github.com/fluent/fluentd/pull/943
  https://github.com/fluent/fluentd/pull/964
  https://github.com/fluent/fluentd/pull/965
  https://github.com/fluent/fluentd/pull/972
  https://github.com/fluent/fluentd/pull/983
* Add standard chunking format
  https://github.com/fluent/fluentd/pull/914
* Add Compatibility layer for v0.12 plugins
  https://github.com/fluent/fluentd/pull/912
  https://github.com/fluent/fluentd/pull/969
  https://github.com/fluent/fluentd/pull/974
  https://github.com/fluent/fluentd/pull/992
  https://github.com/fluent/fluentd/pull/999
* Add Plugin Storage API
  https://github.com/fluent/fluentd/pull/864
  https://github.com/fluent/fluentd/pull/910
* Enforce to use router.emit instead of Engine.emit
  https://github.com/fluent/fluentd/pull/883
* log: Show plugin name and id in logs
  https://github.com/fluent/fluentd/pull/860
* log: Dump configurations with v1 syntax in logs
  https://github.com/fluent/fluentd/pull/867
* log: Dump errors with class in logs
  https://github.com/fluent/fluentd/pull/899
* config: Add simplified syntax for configuration values of hash and array
  https://github.com/fluent/fluentd/pull/875
* config: Add 'init' option to config_section to initialize section objects
  https://github.com/fluent/fluentd/pull/877
* config: Support multiline string in quoted strings
  https://github.com/fluent/fluentd/pull/929
* config: Add optional arguments on Element#elements to select child elements
  https://github.com/fluent/fluentd/pull/948
* config: Show deprecated warnings for reserved parameters
  https://github.com/fluent/fluentd/pull/971
* config: Make the detach process forward interval configurable
  https://github.com/fluent/fluentd/pull/982
* in_tail: Add 'path_key' option to inject tailing path
  https://github.com/fluent/fluentd/pull/951
* Remove in_status plugin
  https://github.com/fluent/fluentd/pull/690

### Bug fixes

* config: Enum list must be of symbols
  https://github.com/fluent/fluentd/pull/821
* config: Fix to dup values in default
  https://github.com/fluent/fluentd/pull/827
* config: Fix problems about overwriting subsections
  https://github.com/fluent/fluentd/pull/844
  https://github.com/fluent/fluentd/pull/981
* log: Serialize Fluent::EventTime as Integer in JSON
  https://github.com/fluent/fluentd/pull/904
* out_forward: Add missing error class and tests for it
  https://github.com/fluent/fluentd/pull/922

### Internal fix / Refactoring

* Fix dependencies between files
  https://github.com/fluent/fluentd/pull/799
  https://github.com/fluent/fluentd/pull/808
  https://github.com/fluent/fluentd/pull/823
  https://github.com/fluent/fluentd/pull/824
  https://github.com/fluent/fluentd/pull/825
  https://github.com/fluent/fluentd/pull/826
  https://github.com/fluent/fluentd/pull/828
  https://github.com/fluent/fluentd/pull/859
  https://github.com/fluent/fluentd/pull/892
* Separate PluginId from config
  https://github.com/fluent/fluentd/pull/832
* Separate MessagePack factory from Engine
  https://github.com/fluent/fluentd/pull/871
* Register plugins to registry
  https://github.com/fluent/fluentd/pull/838
* Move TypeConverter mixin to mixin.rb
  https://github.com/fluent/fluentd/pull/842
* Override default configurations by `<system>`
  https://github.com/fluent/fluentd/pull/854
* Suppress Ruby level warnings
  https://github.com/fluent/fluentd/pull/846
  https://github.com/fluent/fluentd/pull/852
  https://github.com/fluent/fluentd/pull/890
  https://github.com/fluent/fluentd/pull/946
  https://github.com/fluent/fluentd/pull/955
  https://github.com/fluent/fluentd/pull/966

See https://github.com/fluent/fluentd/blob/v0.12/CHANGELOG.md for v0.12 changelog
