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Change Log

2.1.0 - 2018-11-20

  • Fixed a race condition on sampling pollers start.
  • The sampling pollers now also log Error in addition to Exception.
  • Added a public API to CentralizedSamplingStrategy to shutdown pollers for clean exit.
  • Fixed a race condition between TracingHandler and AWSXRayRecorder which could cause an NPE on AWS calls capture. ISSUE29
  • Fixed a NPE bug in spring X-Ray interceptor when context is missing. ISSUE41
  • Fixed a NPE bug in DaemonConfig when system property is used to set up the daemon address. ISSUE40
  • Removed an unused dependency. ISSUE39
  • Removed unnecessary credentials retrieval for AWS client used by sampling pollers. PR34
  • Fixed the UDP address setter not work correctly on DaemonConfig.
  • Catching an NPE when the SDK property file is not reachable on unit tests.

2.0.1 - 2018-09-06

Changed

  • Fixed a bug that caused XRay sampling rules fetching to fail when AWS SDK instrumentor is included. ISSUE25

2.0.0 - 2018-08-28

Backwards incompatible change

  • Default Sampling Strategy has been updated to Centralized Sampling Strategy which gets sampling rules from X-Ray backend instead of from a static JSON file. More Information
  • Implement two new class RulePoller and TargetPoller to periodically updating sampling rules and sampling targets through TCP connection.
  • Fallback to Localized Sampling Strategy when centralized sampling rules are not available.
  • In order to disable Centralized Sampling Strategy, provide withSamplingStrategy with Localized one.
  • Update DefaultSamplingRules.json file. i.e. service_name has been replaced to host and version changed to 2. SDK still supports v1 JSON file. If v1 version JSON has been provided, shouldTrace will treat service_name value as host value.
  • Update shouldTrace method to take only one parameter defined in samplingRequest.
  • Add a new class called DaemonConfiguration and both classes UDPEmitter and XRayClient are depending on it. setDaemonAddress method has been moved to class DaemonConfiguration.

Added

  • Environment variable AWS_TRACING_DAEMON_ADDRESS now takes a value of the form '127.0.0.1:2000' or 'tcp:127.0.0.1:2000 udp:127.0.0.2:2001'. The former one means UDP and TCP are running at the same address and the later one specify individual addresses for TCP and UDP connection. By default it assumes a X-Ray daemon running at 127.0.0.1:2000 listening to both UDP and TCP traffic.
  • Update DefaultOperationParameterWhitelist.json with S3 support. PR9
  • Update README with correct defaultRecorder method. PR10
  • Link scorekeep sample application in README. PR12
  • Add missing open sourcing standard files. PR14
  • Add travis CI. PR16
  • Update getUrl method do not concatenate if the url in request is already absolute. PR20

1.3.1 - 2018-01-12

Changed

  • Fixed a bug in AbstractXRayInterceptor so that generateMetadata can be overriden. PR6

1.3.0 - 2018-01-08

Added

  • Support for Spring Framework which enables the usage of aspects to trace requests down a call stack. Classes can either implement an interface or be annotated to identify themselves as available to the aspect for tracing. PR1

1.2.2 - 2017-12-05

Changed

  • Fixed a bug which caused certain non-sampled segments to be emitted to the X-Ray daemon. This issue occurred only when the segment began as sampled and was manually overridden to non-sampled using setSampled(false).

1.2.1 - 2017-11-20

Changed

  • Fixed a bug in the exception serialization logic that occurred when an added exception had one or more 'cause' exceptions.

1.2.0 - 2017-08-11

Added

  • Additional methods added to the SegmentContext interface. The SegmentContext interface now supports overriding logic for beginning and ending a Segment. This allows customers to use an alternative to ThreadLocal values to pass SegmentContext throughout program execution.

Changed

  • Various string fixes.
  • Exposed the exceptionless version of the close() method on the more generic Entity type. Generic types may now be used in try-with-resources blocks without requiring a catch block.
  • Ignoring subsegment generation on S3 presign request API call.

1.1.2 - 2017-06-29

Added

  • Attempting to modify or re-emit a Segment now throws an unchecked AlreadyEmittedException.

Changed

  • Fixed a concurrent modification exception which occured when many exceptions were being added to a single subsegment at once.
  • Various string fixes.

1.1.1 - 2017-05-17

Added

  • Configuration values set using the environment variables AWS_XRAY_TRACING_NAME, AWS_XRAY_CONTEXT_MISSING, and AWS_XRAY_DAEMON_ADDRESS can now also be set using Java system properties.
    • The corresponding property keys are -Dcom.amazonaws.xray.strategy.tracingName, -Dcom.amazonaws.xray.strategy.contextMissingStrategy, and -Dcom.amazonaws.xray.emitters.daemonAddress respectively.
    • Configuration values set using environment variables take precedence over those set using Java system properties, in turn taking precedence over any configuration values set in code.

Changed

  • Modification or re-emittance of segments or subsegments after they have already been emitted to the X-Ray daemon now results in an AlreadyModifiedException / log message (depending on the ContextMissingStrategy in use).

1.1.0 - 2017-04-19

Added

  • Support for tracing within AWS Lambda functions
  • The provided AWSXRayServletFilter now supports asynchronous HttpServletRequests

Changed

  • Subsegments representing calls to S3 that result in status codes 304 or 412 will no longer be considered as faults.
  • Information about the runtime environment (JVM name and version) is now added to segments under the service namespace.

1.0.6-beta - 2017-03-30

Added

  • Added an additional constructor to DefaultThrowableSerializationStrategy that allows overriding of the Throwable superclass types which are considered to be remote.
  • Added more runtime information to the aws.xray namespace on segments.
  • Added a ContextMissingStrategy member to the AWSXRayRecorder class. This allows configuration of the exception behavior exhibited when trace context is not properly propagated. The behavior can be configured in code. Alternatively, the environment variable AWS_XRAY_CONTEXT_MISSING can be used (overrides any modes set in code). Valid values for this environment variable are currently (case insensitive) RUNTIME_ERROR and LOG_ERROR. The default behavior remains, DefaultContextMissingStrategy extends RuntimeErrorContextMissingStrategy; i.e. by default, an exception will be thrown on missing context.

Changed

  • BREAKING Changed the currentEntityId and currentTraceId methods from static to instance-level methods, in order to have them support the configurable contextMissingBehavior.

Removed

  • BREAKING Removed support for the XRAY_TRACING_NAME environment variable.
  • BREAKING Removed the use of InheritableThreadLocal values to store trace context, in favor of regular ThreadLocal values. This change was made to improve the safety of the way the SDK interacts with thread pools and other collections of long-lived threads.
  • Removed behavior in which calls to AWSXRayRecorder.getThreadLocal() would throw a SegmentNotFoundException when the thread local value contained null. The method now returns null instead of throwing an exception.

1.0.5-beta - 2017-03-06

Added

  • Added the getCurrentSegmentOptional and getCurrentSubsegmentOptional methods to the AWSXRay and AWSXRayRecorder classes.
  • Added pertinent parameters to subsegments wrapping AWS Lambda Invoke and InvokeAsync operations.
  • Added the beginDummySegment() method to the AWSXRay class.

Changed

  • Changed the sdk key to sdk_version in the aws.xray segment property.
  • Changed the getCurrentSegment method in the AWSXRayRecorder class to throw a SegmentNotFoundException if no segment is found.
  • Changed the behavior of the LocalizedSamplingStrategy class to require that all loaded sampling rule JSON files include default fixed_target and rate values under the default namespace. The file must now be versioned, this release supports "version": 1 of the sampling rules document.
    • An example is provided in aws-xray-recorder-sdk-core/src/main/resources/com/amazonaws/xray/strategy/sampling/DefaultSamplingRules.json.
  • Changed the behavior of the aws-xray-recorder-sdk-apache-http submodule to flag its generated subsegments with error/throttle/fault values based on response codes received from downstream HTTP services.

Removed

  • Removed the attribute_names_substituted key that was previously added to subsegments wrapping some DynamoDB operations.
  • Removed the single URL parameter constructor from the DefaultSamplingStrategy class. To pass a custom sampling rules file, use the LocalizedSamplingStrategy.

1.0.4-beta - 2017-02-13

Changed

  • Fixed a bug where the continuous injection of thread-local values to other threads caused a memory leak. This change removes the TraceReference class.
    • AWSXRayRecorder.infectThreadLocal is renamed to AWSXRayRecorder.injectThreadLocal.
    • AWSXRayRecorder.getThreadLocal() now returns an Entity rather than a TraceReference.
    • AWSXRayRecorder.injectThreadLocal(Entity entity) now accepts an Entity rather than a TraceReference.

1.0.3-beta - 2017-01-24

  • No change

1.0.2-beta - 2017-01-24

Added

  • Added the SegmentNamingStrategy interface. Instantation of the AWSXRayServletFilter now requires an instance of SegmentNamingStrategy. A shorthand constructor which accepts a single String is also provided to simplify use of the FixedSegmentNamingStrategy.
  • Added the FixedSegmentNamingStrategy and DynamicSegmentNamingStrategy strategies.

Changed

  • Fixed a bug in the behavior of the custom pattern generation used in sampling rules and the DynamicNamingStrategy.
  • Changed the segment key under which the SDK version is recorded to "xray".
  • Fixed a bug whereby segments with more than 100 subsegments were not properly being streamed to the service.
  • Changed the behavior of the setError method in the EntityImpl class to no longer also modify the fault value.
  • Changed the environment variable key to modify the target daemon address / port to AWS_XRAY_DAEMON_ADDRESS. The value is expected to be of the form ip:port.
  • Changed the environment variable key to override the segment name from XRAY_TRACING_NAME to AWS_XRAY_TRACING_NAME. (XRAY_TRACING_NAME will still be supported until the non-beta release).
  • Moved the precursor_ids property to be a member of only the Subsegment type.

1.0.1-beta - 2016-12-15

Added

  • Added the SDK version to generated segment documents.
  • Added functionality to the DummySegment class in order to pass the Trace ID to downstream services in all cases, including those in which the current request is not sampled.

Changed

  • Fixed a bug in AWSXRayServletFilter that prevented the creation of subsegments for some services running behind ALBs.
  • Updated the dependency on com.amazonaws:aws-java-sdk-core from version 1.11.60 to 1.11.67.
  • Modified the signatures of the close() methods for SegmentImpl and SubsegmentImpl to not throw any exceptions.

Removed

  • Removed redundant HTTP status code parsing logic from the apache-http submodule. The AWS X-Ray service handles setting the fault, error, and throttle flags based on subsegments' provided HTTP status code.