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PHP agent v9.8.0.259

March 25, 2020Download

New Features

Support for W3C Trace Context, with easy upgrade from New Relic trace context

  • Distributed Tracing now supports W3C Trace Context headers for HTTP protocols when distributed tracing is enabled. Our implementation can accept and emit both W3C trace header format and New Relic trace header format. This simplifies agent upgrades, allowing trace context to be propagated between services with older and newer releases of New Relic agents. W3C trace header format will always be accepted and emitted. New Relic trace header format will be accepted, and you can optionally disable emission of the New Relic trace header format.
  • When distributed tracing is enabled, there are two new API function calls available that now support W3C tracestate and traceparent distributed tracing headers in addition to the New Relic distributed tracing header information:
  • When distributed tracing is enabled, you can use the new configuration setting newrelic.distributed_tracing_exclude_newrelic_header to exclude the New Relic distributing tracing header and only rely on W3C Trace Context headers.

Bug fixes

Known Issues and Workarounds

  • If a .NET agent is initiating distributed traces as the root service, you must update that .NET agent to version 8.24 or later before upgrading your downstream PHP New Relic agents to this agent release.
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