.NET agent release notes

Recent .NET agent release notes are listed below. If you would like a release that has been used extensively with a list of known issues, see Established releases (.NET) for download and version information.

.NET agent release notes

Thursday, November 14, 2019 - 12:00 Download

Download URLs

Download the appropriate release for your New Relic .NET agent:

https://download.newrelic.com/dot_net_agent/latest_release

Fixes

  • [.NET Core] Fixes a problem that could cause some .NET Core 3.0 applications, configured with an invalid license key, to hang.

Upgrading

Thursday, October 17, 2019 - 16:00

New Features

  • Improved support for WCF.

    • Support for Task-based (TAP) service calls.
    • Distributed Tracing and CAT are automatically supported for HTTP-based binding types (such as BasicHTTP, WebHTTP, WSHTTP).
    • Non-HTTP binding types (such as NetTCP, MSMQ, Named Pipes) are instrumented, but do not automatically support Distributed Tracing and CAT.
  • [.NET Core] Adds support for .NET Core 3.1 beginning with preview 1.

  • Performance Metrics: The .Net Agent collects information about application performance in the following areas.

    • Memory and CPU Utilization
    • Garbage Collection
    • Threadpool Usage and Throughput

    Please refer to online documentation for further information.

Fixes

  • [.NET Framework] Fix an issue where reading application settings from web.config or app.config could prevent the agent from starting up.
  • [.NET Framework] Fix an issue where the agent caused an application to deadlock when using a ConfigurationBuilder. This was commonly seen in applications using the AzureKeyVaultConfigBuilder.
  • Fix an issue introduced in 8.16 where Memory and CPU metrics failed to update.

Upgrading

Tuesday, October 1, 2019 - 16:00 Download

New Features

  • .NET agent installation procedures have been simplified for Windows environments enabling you to more easily monitor .NET Core applications. Our standard installation procedures use a single MSI installer to install support for both .NET Framework and .NET Core applications. If you previously only monitored .NET Framework applications then nothing changes for you. If you were previously installing our .NET Core support using one of our manual install procedures you may need to port any custom modifications you have made to your newrelic.config and any XML custom instrumentation you have applied to the new install location.
  • Trace Accessors APIs: two new API calls to obtain information used to support tracing.
    • TraceMetadata - returns a property with access to the following:
      • TraceId - the currently executing trace's identifier.
      • SpanId - the currently executing span's identifier.
      • IsSampled - returns whether or not the current transaction is part of a sampled distributed trace.
    • GetLinkingMetadata - returns key/value pairs which can be used to correlate this application in the New Relic backend.

Fixes

  • [.NET Framework] Fix an issue in WCF instrumentation where multiple transactions were created for a call to a WCF service endpoint that used the begin/end async pattern.
  • [.NET Core] Fix an application crash bug on Alpine Linux.

Upgrading

Monday, August 26, 2019 - 15:00

New Features

  • Adds instrumentation for StackExchange.Redis asynchronous methods. Generally, these methods end with the Async suffix (e.g., StringSetAsync).
  • [.NET Core] Adds support in the .NET Core Agent for StackExchange.Redis.

Fixes

  • Resolves security issue where a manually constructed SQL stored procedure invocation may cause sensitive data to be captured in metric names. See Security Bulletin NR19-05
  • Fix a memory leak introduced in agent version 8.17.438.0.
  • Fixes an issue where NullReferenceExceptions may be logged in scenarios where a large number of segments are created for a single transaction.
  • Fix an issue where the request.uri attribute on transaction traces and event data would be set to the full URI of the request instead of the request path (e.g., http://www.domain.com/request/path instead of /request/path) in automatic instrumentation of ASP.NET and WCF applications, as well as in the agent API method SetTransactionUri().
  • [.NET Core] Fix an issue where memory and CPU metrics may be overstated in APM.
  • [.NET Framework] Fix an issue with the 8.17.438.0 release which can cause a delay in starting up an application.
  • [.NET Framework] Fix an issue where the agent may fail to start for 32-bit ASP.NET MVC applications when the NewRelic.Agent NuGet package was used to install the agent.
  • [.NET Framework] Fix an issue on agent shutdown where an error log message may appear in the agent log indicating an HTTP 409 error response from New Relic. This error did not have any other impact other than appearing in the log.
  • [.NET Framework] Fix an issue where a large number of error messages may be reported on agent startup due to insufficient permissions of the app-pool user to create performance counters. In this release, a specific warning message regarding permissions will be reported.

Upgrading

Monday, August 26, 2019 - 14:30 Download

Download URLs

Download the appropriate release for your New Relic .NET agent:

This is a security-only release for the 6.x agents that support legacy frameworks (.NET version 4.5 and lower). If you are on .NET version 4.5 or higher, or if you are on .NET Core, use the 7.x or later agent versions.

Fixes

Resolves security issue where a manually constructed SQL stored procedure invocation may cause sensitive data to be captured in metric names. See Security Bulletin NR19-05.

Upgrading

Monday, July 22, 2019 - 13:00 Download

New Features

  • This release adds Transaction event attributes that provide context between your Kubernetes cluster and services. For details on the benefits see this blog post.
  • The NewRelic.Agent NuGet package now includes the x86 (32-bit) profiler for Windows. To monitor 32-bit Windows applications using this NuGet package the COR_PROFILER_PATH (.NET Framework) or the CORECLR_PROFILER_PATH (.NET Core) environment variable needs to be set to the path the of the 32-bit profiler DLL (NewRelic.Profiler.x86.dll).
  • For .NET Core applications hosted in Azure App Services, the New Relic Azure Site Extension can now be used to install the agent. This was previously only available for .NET Framework applications. Follow these procedures to install.

Fixes

  • Fixed an issue where the NRQL Extrapolate clause in Insights did not work properly for Transaction Events.
  • Fixed an issue where cross application tracing could cause a metric grouping issue (MGI) for web requests that result in a 300 or higher response status code. Transaction names may now be rolled up by status code.
  • Fixed an issue where browser script injection in ASP.NET applications could cause a metric grouping issue (MGI) for web requests that result in a 30x redirect status code. Transaction names may now be rolled up by status code.

Upgrading

Tuesday, June 11, 2019 - 15:30 Download

Fixes

  • CORS (Cross-Origin Resource Sharing) “pre-flight” requests with the HTTP OPTIONS method were causing extraneous metrics to be generated for ASP.NET Core applications using the CORS middleware. These requests will now be ignored by the agent.
  • Fixes a problem where WCF instrumentation shuts down when WebHttpBinding is used and CAT is enabled.
  • Fixes a problem where an async WCF client call may prevent further data from being captured in a transaction.

New Features

  • Adds database instrumentation for Microsoft.Data.SqlClient.

Upgrading

Monday, April 22, 2019 - 14:30

Fixes

  • Fixes a problem with parsing method signatures that do not align with ECMA-335 that could cause an application to crash.
  • Fixes a problem where third-party libraries that perform assembly-scanning using reflection may encounter TypeLoadExceptions.
  • Fixes a problem where the agent may incorrectly report Response Time when custom instrumentation is applied to methods that are called from within an instrumented framework (such as ASP.Net).
  • Resolves security issue with how SQL Server handles escaping which could lead to a failure to correctly obfuscate SQL statements. See Security Bulletin NR19-03.
  • Resolves issue with not rolling up 30x HTTP response codes which resulted in MGI issues.

New Features

  • Adds improved WCF support
    • WCF client task asynchronous programming model (following the task asynchronous pattern) calls are tracked as external calls.

Upgrading

Monday, April 22, 2019 - 14:30 Download

Download URLs

Download the appropriate release for your New Relic .NET agent:

This is a security-only release for the 6.x agents that support legacy frameworks (.NET version 4.5 and lower). If you are on .NET version 4.5 and higher or .NET Core, the 7.x or later versions of the agent should be used.

Fixes

  • Resolved security issue with how SQL Server handles escaping which could lead to a failure to correctly obfuscate SQL statements. See Security Bulletin NR19-03.

Upgrading

Monday, March 18, 2019 - 16:30

Fixes

  • Fixed issue where transactions may not get reported when custom instrumentation is applied to async methods with a void return type. Instrumenting async void methods is generally not recommended and may result in unexpected segment timing as well as the disruption of downstream instrumentation. Please review async limitations online help for alternative approaches.

New Features

  • [.NET Core] Adds support for .NET Core 3.0
  • [.NET Core] Adds support for ASP.NET Core 3.0
  • [.NET Framework] Adds support for .NET Framework 4.8 Early Access build 3694
  • Adds official support for Postgres/Npgsql versions 4.0.
    • Supports Sync and Async methods, on .Net Framework and .Net Core running in Windows and Linux.
    • Eliminates duplicate and extraneous datastore metrics and trace segments associated with opening connections to databases (as seen in prior agent versions).
    • Npgsql versions older than 4.0 may also be instrumented, but duplicate and/or missing metrics are possible.
  • Adds improved WCF support
    • WCF client calls are tracked as external calls
    • WCF client synchronous and asynchronous programming model (following the begin/end asynchronous pattern) calls are tracked.

Upgrading

Tuesday, February 12, 2019 - 14:00

Fixes

  • [Framework] Improved support for async workloads in self-hosted OWIN applications.
  • [Framework] Status code only errors are now noticed in self-hosted OWIN applications.

New Features

  • [Framework] Adds support for the following in .Net Framework self-hosted OWIN apps:
    • Microsoft OWIN version 4
    • Distributed tracing
    • Cross application tracing
    • Request parameters capture
    • Request URI capture
    • Introduces single metric creation for HTTP status codes 400 and greater
    • Exception capture from OWIN middleware components

Upgrading

Wednesday, January 9, 2019 - 14:00

Fixes

  • Fixed an issue where the response time of a web transaction could be misreported when making asynchronous external calls whose duration extended beyond the time the web transaction response ended.
  • Fixed an issue when using OpenRasta instrumentation where the full URL could be captured on instrumented requests. This may have resulted in query strings being collected which can contain sensitive information. See security bulletin NR19-01.
  • Fixes an issue with auto-instrumenting RestSharp and Couchbase driver calls involving non-public collection types.

Upgrading

Monday, December 17, 2018 - 14:30

Fixes

  • Fixes an issue where stack traces for custom errors outside a transaction were not visible in the Error Analytics UI page.
  • Fixes an issue with auto-instrumenting MongoDB driver calls involving non-public collection types.
  • Fixes an issue with reporting the same transaction multiple times.

New Features

  • Improved performance when serializing metrics prior to sending to New Relic.
  • Improved SQL-related database instrumentation performance.

Upgrading

Thursday, November 29, 2018 - 16:00

Fixes

  • Fixes a bug in SQL-related database instrumentation that potentially causes a CPU spike. This bug appeared in the agent version 8.9.130.

New Features

  • [.NET Core] Adds support for .NET Core 2.2.
  • Adds support for ASP.NET Core 2.2.
  • Improves the performance of cross application tracing.

Upgrading

Thursday, November 15, 2018 - 10:00

Fixes

Added auto instrumentation to prevent associating Serilog PeriodicBatchingSink activity with an application’s transactions.

New Features

Added API support for manually creating and accepting distributed tracing payloads.

Upgrading

Thursday, October 18, 2018 - 13:30

Fixes

  • Fixes potential memory leak when Distributed Tracing is enabled.
  • Fixes an issue where a NullReferenceException is logged for certain data stores (MongoDB and Couchbase) when distributed tracing is enabled.
  • Fixes an issue where a transaction start time is incorrect when an error has been reported.

Other Information

  • After November 7th, 2018 the Core_20 directory will be removed from the download site. This folder currently contains an outdated version of the .Net Core agent. The most up-to-date version of the .NET Core agent can be found in inlatest_release directory.

Upgrading

Wednesday, October 3, 2018 - 13:30

New Features

Fixes

  • The profiler now honors the log level configuration setting that is set in the app-local newrelic.config file.

Other Information

  • After November 7th, 2018 the Core_20 directory will be removed from the download site. This folder currently contains an outdated version of the .Net Core agent. The most up-to-date version of the .NET Core agent can be found in inlatest_release directory.

Upgrading

Tuesday, August 28, 2018 - 10:00

Download URLs

Download the appropriate release for your New Relic .NET agent:

https://download.newrelic.com/dot_net_agent/latest_release

New Features

  • Distributed tracing lets you see the path that a request takes as it travels through your distributed system. By showing the distributed activity through a unified view, you can troubleshoot and understand a complex system better than ever before. Distributed tracing is available with an APM Pro or equivalent subscription. To see a complete distributed trace, you need to enable the feature on a set of neighboring services. Enabling distributed tracing changes the behavior of some New Relic features, so carefully consult the transition guide before you enable this feature.
  • To enable distributed tracing, see .NET Agent configuration.

Upgrading

Thursday, August 16, 2018 - 15:00

New Features

  • Adds support for capturing request.uri attribute for WCF services when available.
  • [.NET Core] SQL query parameter values can now be captured on Slow SQL Traces on Linux.

Fixes

  • Fixes an issue where errors set to be ignored through configuration were not being ignored.
  • Fixes an issue where running the thread profiler can cause an application to terminate.
  • Fixes an issue where transaction events could be dropped.
  • [.NET Core] Fixes an issue for .NET Core applications running on Linux when serializing slow SQL trace and explain plan data for transmission to New Relic. Previously, the following exception would be seen in the agent logs: NewRelic ERROR: System.PlatformNotSupportedException: Operation is not supported on this platform.

Notes

  • We will be removing the core_20 directory from the download site the week of September 3rd, 2018 as it contains a deprecated version of the .Net Core agent. Please be sure to update any of your scripts that reference this location accordingly.
    • All downloads for the current version of the agent can be found in the latest_release directory on the download site.
    • Historical versions can be found in the previous_releases directory.

Upgrading

Monday, July 30, 2018 - 11:30

Download URLs

Download the appropriate release for your New Relic .NET agent:

https://download.newrelic.com/dot_net_agent/previous_releases

New Features

  • SQL query parameter values can now be captured on Slow SQL Traces. This feature can be enabled with the new configuration option datastoreTracer.queryParameters. The transactionTracer.record_sql configuration option must also be set to raw. See documentation here. This feature should be used with caution as it can lead to the capture of sensitive data. High Security Mode prevents the use of this feature. Windows support only. Linux support coming soon.
  • [.NET Framework] Adds support for tracking async transactions when .ConfigureAwait(false) is used from async controller actions in ASP.NET MVC applications.
  • [.NET Core] Adds support for .NET Core 2.1. Support for .NET Core 2.1 requires at least CLR version 2.1.3 and tiered compilation must not be enabled.

Fixes

  • [.NET Core] Fixes issue where status code based errors would be reported instead of the actual noticed Exception. This most commonly occurred with errors noticed in the ExceptionHandlerMiddleware (app.UseExceptionHandler(...)).
  • Fixes an issue where only the first request parameter is captured when request.parameters.* attributes are added to an include list.

Notes

  • We will be removing the core_20 directory from the download site the week of September 3rd, 2018 as it contains a deprecated version of the .Net Core agent. Please be sure to update any of your scripts that reference this location accordingly.
    • All downloads for the current version of the agent can be found in the latest_release directory on the download site.
    • Historical versions can be found in the previous_releases directory.

Upgrading

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