Changelog

Default trace buffer size from 100 to 1000 (#865)
Rack request start headers to accept more values (#832) (@JamesHarker)
Faraday to apply default instrumentation out-of-the-box (#786, #843) (@mdross95)

Fixed

Synthetics trace context being ignored (#856)

Refactored

Tracer buffer constants (#851)

Removed

Some old Ruby 1.9 code (#819, #844)

0.28.0 - 2019-10-01

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.28.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.27.0...v0.28.0

Added

Support for Rails 6.0 (#814)
Multiplexing on hostname/port for Dalli (#823)
Support for Redis array arguments (#796, #817) (@brafales)

Refactored

Encapsulate span resource name in Faraday integration (#811) (@giancarlocosta)

0.27.0 - 2019-09-04

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.27.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.26.0...v0.27.0

Support for Ruby < 2.0 is removed. Plan for timeline is as follows:

0.25.0: Support for Ruby < 2.0 is deprecated; retains full feature support.
0.26.0: Last version to support Ruby < 2.0; any new features will not support 1.9.
0.27.0: Support for Ruby < 2.0 is removed.

Version 0.26.x will receive only critical bugfixes for 1 year following the release of 0.26.0 (August 6th, 2020.)

Added

Support for Ruby 2.5 & 2.6 (#800, #802)
Ethon integration (#527, #778) (@al-kudryavtsev)

Refactored

Rails integration into smaller integrations per component (#747, #762, #795)

Removed

Support for Ruby 1.9 (#791)

0.26.0 - 2019-08-06

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.26.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.25.1...v0.26.0

Support for Ruby < 2.0 is deprecated. Plan for timeline is as follows:

0.25.0: Support for Ruby < 2.0 is deprecated; retains full feature support.
0.26.0: Last version to support Ruby < 2.0; any new features will not support 1.9.
0.27.0: Support for Ruby < 2.0 is removed.

Version 0.26.x will receive only critical bugfixes for 1 year following the release of 0.26.0 (August 6th, 2020.)

Added

Container ID tagging for containerized environments (#784)

Refactored

Datadog::Metrics constants (#789)

Removed

Datadog::HTTPTransport and related components (#782)

0.25.1 - 2019-07-16

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.25.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.25.0...v0.25.1

Fixed

Redis integration not quantizing AUTH command (#776)

0.25.0 - 2019-06-27

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.25.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.24.0...v0.25.0

Support for Ruby < 2.0 is deprecated. Plan for timeline is as follows:

0.25.0: Support for Ruby < 2.0 is deprecated; retains full feature support.
0.26.0: Last version to support Ruby < 2.0; any new features will not support 1.9.
0.27.0: Support for Ruby < 2.0 is removed.

Version 0.26.x will receive only critical bugfixes for 1 year following the release of 0.26.0.

Added

Unix socket support for transport layer (#770)

Changed

Renamed 'ForcedTracing' to 'ManualTracing' (#765)

Fixed

HTTP headers for distributed tracing sometimes appearing in duplicate (#768)

Refactored

Transport layer (#628)

Deprecated

Ruby < 2.0 support (#771)
Use of Datadog::HTTPTransport (#628)
Use of Datadog::Ext::ForcedTracing (#765)

0.24.0 - 2019-05-21

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.24.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.23.3...v0.24.0

Added

B3 header support (#753)
Hostname tagging option (#760)
Contribution and development guides (#754)

0.23.3 - 2019-05-16

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.23.3

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.23.2...v0.23.3

Fixed

Integrations initializing tracer at load time (#756)

0.23.2 - 2019-05-10

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.23.2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.23.1...v0.23.2

Fixed

Span types for HTTP, web, and some datastore integrations (#751)
AWS integration not patching service-level gems (#707, #752) (@alksl, @tonypinder)
Rails 6 warning for parent_name (#750) (@sinsoku)

0.23.1 - 2019-05-02

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.23.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.23.0...v0.23.1

Fixed

NoMethodError runtime_metrics for SyncWriter (#748)

0.23.0 - 2019-04-30

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.23.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.22.0...v0.23.0

Added

Error status support via tags for OpenTracing (#739)
Forced sampling support via tags (#720)

Fixed

Wrong return values for Rake integration (#742) (@Redapted)

Removed

Obsolete service telemetry (#738)

0.22.0 - 2019-04-15

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.22.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.21.2...v0.22.0

In this release we are adding initial support for the beta Runtime metrics collection feature.

Changed

Add warning log if an integration is incompatible (#722) (@ericmustin)

Added

Initial beta support for Runtime metrics collection (#677)

0.21.2 - 2019-04-10

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.21.2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.21.1...v0.21.2

Changed

Support Mongo gem 2.5+ (#729, #731) (@ricbartm)

0.21.1 - 2019-03-26

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.21.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.21.0...v0.21.1

Changed

Support TAG_ENABLED for custom instrumentation with analytics. (#728)

0.21.0 - 2019-03-20

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.21.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.20.0...v0.21.0

Added

Trace analytics support (#697, #715)
HTTP after_request span hook (#716, #724)

Fixed

Distributed traces with IDs in 2^64 range being dropped (#719)
Custom logger level forced to warning (#681, #721) (@blaines, @ericmustin)

Refactored

Global configuration for tracing into configuration API (#714)

0.20.0 - 2019-03-07

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.20.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.19.1...v0.20.0

This release will log deprecation warnings for any usage of Datadog::Pin. These changes are backwards compatible, but all integration configuration should be moved away from Pin and to the configuration API instead.

Added

Propagate synthetics origin header (#699)

Changed

Enable distributed tracing by default (#701)

Fixed

Fix Rack http_server.queue spans missing from distributed traces (#709)

Refactored

Refactor MongoDB to use instrumentation module (#704)
Refactor HTTP to use instrumentation module (#703)
Deprecate GRPC global pin in favor of configuration API (#702)
Deprecate Grape pin in favor of configuration API (#700)
Deprecate Faraday pin in favor of configuration API (#696)
Deprecate Dalli pin in favor of configuration API (#693)

0.19.1 - 2019-02-07

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.19.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.19.0...v0.19.1

Added

Documentation for Lograge implementation (#683, #687) (@nic-lan)

Fixed

Priority sampling dropping spans (#686)

0.19.0 - 2019-01-22

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.19.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.18.3...v0.19.0

Added

Tracer#active_correlation for adding correlation IDs to logs. (#660, #664, #673)
Opt-in support for event_sample_rate tag for some integrations. (#665, #666)

Changed

Priority sampling enabled by default. (#654)

0.18.3 - 2019-01-17

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.18.3

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.18.2...v0.18.3

Fixed

Mongo NoMethodError when no span available during #failed. (#674, #675) (@Azure7111)
Rack deprecation warnings firing with some 3rd party libraries present. (#672)
Shoryuken resource name when used with ActiveJob. (#671) (@aurelian)

0.18.2 - 2019-01-03

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.18.2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.18.1...v0.18.2

Fixed

Unfinished Mongo spans when SASL configured (#658) (@zachmccormick)
Possible performance issue with unexpanded Rails cache keys (#630, #635) (@gingerlime)

0.18.1 - 2018-12-20

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.18.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.18.0...v0.18.1

Fixed

ActiveRecord SystemStackError with some 3rd party libraries (#661, #662) (@EpiFouloux, @tjgrathwell, @guizmaii)

0.18.0 - 2018-12-18

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.18.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.17.3...v0.18.0

Added

Shoryuken integration (#538, #626, #655) (@steveh, @JustSnow)
Sidekiq client integration (#602, #650) (@dirk)
Datadog::Shim for adding instrumentation (#648)

Changed

Use DD_AGENT_HOST and DD_TRACE_AGENT_PORT env vars if available (#631)
Inject :connection into sql.active_record event (#640, #649, #656) (@guizmaii)
Return default configuration instead of nil on miss (#651)

0.17.3 - 2018-11-29

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.17.3

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.17.2...v0.17.3

Fixed

Bad resource names for Grape::API objects in Grape 1.2.0 (#639)
RestClient raising NoMethodError when response is nil (#636, #642) (@frsantos)
Rack middleware inserted twice in some Rails applications (#641)

0.17.2 - 2018-11-23

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.17.2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.17.1...v0.17.2

Fixed

Resque integration shutting down tracer when forking is disabled (#637)

0.17.1 - 2018-11-07

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.17.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.17.0...v0.17.1

Fixed

RestClient incorrect app type (#583) (@gaborszakacs)
DelayedJob incorrect job name when used with ActiveJob (#605) (@agirlnamedsophia)

0.17.0 - 2018-10-30

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.17.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.16.1...v0.17.0

Added

[BETA] Span memory allocations attribute (#597) (@dasch)

Changed

Use Rack Env to update resource in Rails (#580) (@dasch)
Expand support for Sidekiq to 3.5.4+ (#593)
Expand support for mysql2 to 0.3.21+ (#578)

Refactored

Upgraded integrations to new API (#544)
Encoding classes into modules (#598)

0.16.1 - 2018-10-17

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.16.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.16.0...v0.16.1

Fixed

Priority sampling response being mishandled (#591)
HTTP open timeout to agent too long (#582)

0.16.0 - 2018-09-18

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.16.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.15.0...v0.16.0

Added

OpenTracing support (#517)
middleware option for disabling Rails trace middleware. (#552)

0.15.0 - 2018-09-12

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.15.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.14.2...v0.15.0

Added

Rails 5.2 support (#535)
Context propagation support for Concurrent::Future (#415, #496)

Fixed

Grape uninitialized constant TraceMiddleware (#525, #533) (@dim)
Signed integer trace and span IDs being discarded in distributed traces (#530) (@alloy)

0.14.2 - 2018-08-23

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.14.2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.14.1...v0.14.2

Fixed

Sampling priority from request headers not being used (#521)

0.14.1 - 2018-08-21

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.14.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.14.0...v0.14.1

Changed

Reduce verbosity of connection errors in log (#515)

Fixed

Sequel 'not a valid integration' error (#514, #516) (@steveh)

0.14.0 - 2018-08-14

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.14.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.13.2...v0.14.0

Added

RestClient integration (#422, #460)
DelayedJob integration (#393 #444)
Version information to integrations (#483)
Tracer#active_root_span helper (#503)

Changed

Resque to flush traces when Job finishes instead of using SyncWriter (#474)
ActiveRecord to allow configuring multiple databases (#451)
Integrations configuration settings (#450, #452, #451)

Fixed

Context propagation for distributed traces when context is full (#502)
Rake shutdown tracer after execution (#487) (@kissrobber)
Deprecation warnings fired using Unicorn (#508)

0.14.0.rc1 - 2018-08-08

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.14.0.rc1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.14.0.beta2...v0.14.0.rc1

Added

RestClient integration (#422, #460)
Tracer#active_root_span helper (#503)

Fixed

Context propagation for distributed traces when context is full (#502)

0.14.0.beta2 - 2018-07-25

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.14.0.beta2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.14.0.beta1...v0.14.0.beta2

Fixed

Rake shutdown tracer after execution (#487) @kissrobber

0.14.0.beta1 - 2018-07-24

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.14.0.beta1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.13.1...v0.14.0.beta1

Changed

Resque to flush traces when Job finishes instead of using SyncWriter (#474)
ActiveRecord to allow configuring multiple databases (#451)
Integrations configuration settings (#450, #452, #451)

Fixed

Ruby warnings during tests (#499)
Tests failing intermittently on Ruby 1.9.3 (#497)

Added

DelayedJob integration (#393 #444)
Version information to integrations (#483)

0.13.2 - 2018-08-07

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.13.2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.13.1...v0.13.2

Fixed

Context propagation for distributed traces when context is full (#502)

0.13.1 - 2018-07-17

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.13.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.13.0...v0.13.1

Changed

Configuration class variables don't lazy load (#477)
Default tracer host localhost --> 127.0.0.1 (#466, #480) (@NobodysNightmare)

Fixed

Workers not shutting down quickly in some short running processes (#475)
Missing documentation for mysql2 and Rails (#476, #488)
Missing variable in rescue block (#481) (@kitop)
Unclosed spans in ActiveSupport::Notifications with multithreading (#431, #478) (@senny)

0.13.0 - 2018-06-20

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.13.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.12.1...v0.13.0

Added

Sequel integration (supporting Ruby 2.0+) (#171, #367) (@randy-girard, @twe4ked, @palin)
gRPC integration (supporting Ruby 2.2+) (#379, #403) (@Jared-Prime)
ActiveModelSerializers integration (#340) (@sullimander)
Excon integration (#211, #426) (@walterking, @jeffjo)
Rake integration (supporting Ruby 2.0+, Rake 12.0+) (#409)
Request queuing tracing to Rack (experimental) (#272)
ActiveSupport::Notifications::Event helper for event tracing (#400)
Request and response header tags to Rack (#389)
Request and response header tags to Sinatra (#427, #375)
MySQL2 integration (#453) (@jamiehodge)
Sidekiq job delay tag (#443, #418) (@gottfrois)

Fixed

Elasticsearch quantization of ids (#458)
MongoDB to allow quantization of collection name (#463)

Refactored

Hash quantization into core library (#410)
MongoDB integration to use Hash quantization library (#463)

Changed

Hash quantization truncates arrays with nested objects (#463)

0.13.0.beta1 - 2018-05-09

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.13.0.beta1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.12.0...v0.13.0.beta1

Added

Sequel integration (supporting Ruby 2.0+) (#171, #367) (@randy-girard, @twe4ked, @palin)
gRPC integration (supporting Ruby 2.2+) (#379, #403) (@Jared-Prime)
ActiveModelSerializers integration (#340) (@sullimander)
Excon integration (#211) (@walterking)
Rake integration (supporting Ruby 2.0+, Rake 12.0+) (#409)
Request queuing tracing to Rack (experimental) (#272)
ActiveSupport::Notifications::Event helper for event tracing (#400)
Request and response header tags to Rack (#389)

Refactored

Hash quantization into core library (#410)

0.12.1 - 2018-06-12

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.12.1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.12.0...v0.12.1

Changed

Cache configuration Proxy objects (#446)
freeze more constant strings, to improve memory usage (#446)
Utils#truncate to use slightly less memory (#446)

Fixed

Net/HTTP integration not permitting service_name to be overridden. (#407, #430) (@undergroundwebdesigns)
Block not being passed through Elasticsearch client initialization. (#421) (@shayonj)
Devise raising NoMethodError when bad login attempts are made. (#419, #420) (@frsantos)
AWS spans using wrong resource name (#374, #377) (@jfrancoist)
ActionView NoMethodError on very long traces. (#445, #447) (@jvalanen)

Refactored

ActionController patching strategy using modules. (#439)
ActionView tracing strategy. (#445, #447)

0.12.0 - 2018-05-08

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.12.0

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.11.4...v0.12.0

Added

GraphQL integration (supporting graphql 1.7.9+) (#295)
ActiveRecord object instantiation tracing (#311, #334)
Subscriber module for ActiveSupport::Notifications tracing (#324, #380, #390, #395) (@dasch)
HTTP quantization module (#384)
Partial flushing option to tracer (#247, #397)

Changed

Rack applies URL quantization by default (#371)
Elasticsearch applies body quantization by default (#362)
Context for a single trace now has hard limit of 100,000 spans (#247)
Tags with rails.db.x to active_record.db.x instead (#396)

Fixed

Loading the ddtrace library after Rails has fully initialized can result in load errors. (#357)
Some scenarios where middleware_names could result in bad resource names (#354)
ActionController instrumentation conflicting with some gems that monkey patch Rails (#391)

Deprecated

Use of :datadog_rack_request_span variable in favor of 'datadog.rack_request_span' in Rack. (#365, #392)

Refactored

Racecar to use ActiveSupport::Notifications Subscriber module (#381)
Rails to use ActiveRecord integration instead of its own implementation (#396)
ActiveRecord to use ActiveSupport::Notifications Subscriber module (#396)

0.12.0.rc1 - 2018-04-11

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.12.0.rc1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.11.4...v0.12.0.rc1

Added

GraphQL integration (supporting graphql 1.7.9+) (#295)
ActiveRecord object instantiation tracing (#311, #334)
Subscriber module for ActiveSupport::Notifications tracing (#324, #380, #390, #395) (@dasch)
HTTP quantization module (#384)
Partial flushing option to tracer (#247, #397)

Changed

Rack applies URL quantization by default (#371)
Elasticsearch applies body quantization by default (#362)
Context for a single trace now has hard limit of 100,000 spans (#247)
Tags with rails.db.x to active_record.db.x instead (#396)

Fixed

Loading the ddtrace library after Rails has fully initialized can result in load errors. (#357)
Some scenarios where middleware_names could result in bad resource names (#354)
ActionController instrumentation conflicting with some gems that monkey patch Rails (#391)

Deprecated

Use of :datadog_rack_request_span variable in favor of 'datadog.rack_request_span' in Rack. (#365, #392)

Refactored

Racecar to use ActiveSupport::Notifications Subscriber module (#381)
Rails to use ActiveRecord integration instead of its own implementation (#396)
ActiveRecord to use ActiveSupport::Notifications Subscriber module (#396)

0.12.0.beta2 - 2018-02-28

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.12.0.beta2

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.12.0.beta1...v0.12.0.beta2

Fixed

Loading the ddtrace library after Rails has fully initialized can result in load errors. (#357)

0.12.0.beta1 - 2018-02-09

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.12.0.beta1

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.11.2...v0.12.0.beta1

Added

GraphQL integration (supporting graphql 1.7.9+) (#295)
ActiveRecord object instantiation tracing (#311, #334)
http.request_id tag to Rack spans (#335)

0.11.4 - 2018-03-29

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.11.4

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.11.3...v0.11.4

Fixed

Transport body parsing when downgrading (#369)
Transport incorrectly attempting to apply sampling to service metadata (#370)
sql.active_record traces showing incorrect adapter settings when non-default adapter used (#383)

0.11.3 - 2018-03-06

Release notes: https://github.com/DataDog/dd-trace-rb/releases/tag/v0.11.3

Git diff: https://github.com/DataDog/dd-trace-rb/compare/v0.11.2...v0.11.3

Added

CHANGELOG.md (#350, #363) (@awendt)
http.request_id tag to Rack spans (#335)
Tracer configuration to README.md (#332) (@noma4i)

Fixed

Extra indentation in README.md (#349) (@ck3g)
http.url when Rails raises exceptions (#351, #353)
Rails from being patched twice (#352)
4XX responses from middleware being marked as errors (#345)
Rails exception middleware sometimes not being inserted at correct position (#345)
Processing pipeline documentation typo (#355) (@MMartyn)
Loading the ddtrace library after Rails has fully initialized can result in load errors. (#357)
Use of block syntax with Rails render not working (#359, #360) (@dorner)