Python agent release notesRSS

Notes

This release of the Python agent includes a bug fix for reporting inaccurate metric values.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Bug Fixes

• Metrics may be reported with an incorrect throughput after communication failure with New Relic

  For agent versions 5.2.0 through 5.4.0, metric throughput may have been reported inaccurately after experiencing network / communication failures with New Relic. The throughput reported for all metrics after this failure may have been abnormally high.

Notes

This release of the Python agent includes the logs in context feature and bug fixes.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Features

• Logs In Context

  The logs in context feature is now supported by the PythonaAgent. For more information, see the Python logs-in-context page.

Bug Fixes

• The plugin list in the environment page may have been inaccurately reported

  When using absolute imports in Python 2, the agent may have reported relative imports that were attempted but unsuccessful. Python 3 is not impacted. Modules are now reported correctly in Python 2.

Notes

This release of the Python agent includes support for Python 3.8 and restores the original record-deploy command interface.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Updates

• Added Support for Python 3.8

  Python 3.8 support has been added in this release.

• Restore newrelic-admin record-deploy command interface

  The newrelic-admin command was previously updated to require an application id via the command line. The requirement has been removed, restoring the original record-deploy CLI arguments.

Notes

This release of the Python agent includes bug fixes.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Bug Fixes

• Fix thread utilization data on agent versions v5.x.x

  Thread utilization data was not reported for agents v5.x.x, resulting in missing data on the capacity analysis page. The agent will now report thread utilization data.

• Fix untraced database calls when using pymysql context manager assignments

  When using context managers to create and assign a cursor in pymysql, database calls on that cursor object were not traced. Database calls in pymysql are now properly traced.

Notes

This release of the Python agent includes bug fixes.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Bug Fixes

• Fix a crash when using future-based interfaces on Tornado's http client

  Tornado's http client returns a future when fetch is called. Prior to this release, the agent caused a coroutine object to be returned rather than a future, causing a potential crash when application code assumed a future would be returned. A future will now be returned from http client fetch as expected.

• Fix a crash when running a coroutine created in another transaction

  When running a coroutine outside of the transaction that created it, the agent may have crashed if a separate transaction was active.

Notes

This release of the Python agent includes a bug fix for tornado and support for recording deployment markers in the EU region as well as specifying a deploy timestamp.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Features

• Support for Real Time Streaming

  • Event data is now sent to New Relic every five seconds, instead of every minute. As a result, transaction, error, and custom events will now be available in New Relic and Insights dashboards in near real time. For more information on how to view your events with a five-second refresh, see the real time streaming documentation.
  • Note that the overall limits on how many events can be sent per minute have not changed. Also, span events, metrics, and trace data is unaffected, and will still be sent every minute.

• Added timestamp and EU region support for recording deployment markers

  When using the newrelic-admin record-deploy script an optional timestamp can be provided to specify when the deployment marker should be created. Furthermore support for accounts in the EU region have been added in this release.

Bug Fixes

• Fixed a crash in tornado versions >= 6.1

  Tornado 6.1 internals changed in a way that may have caused the agent's built-in instrumentation to fail. The instrumentation has been updated to alleviate this issue.

Notes

This release of the Python agent includes bug fixes for feedparser and django-piston.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Bug Fixes

• Fixed a crash when using feedparser

  When running with the feedparser library the agent would crash on attempting to parse an RSS feed. This issue has now been corrected.

• Fixed a crash when using django-piston

  When running with the django-piston library the agent would crash on attempting to service a request. This issue has now been corrected.

Notes

This release of the Python agent includes a bug fix for the mako library instrumentation.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Bug Fixes

• Fixed a crash when using the Mako template library

  When running with the Mako template library the agent would crash on attempting to render a template. This issue has now been corrected.

Notes

This release of the Python agent introduces:

• Event loop diagnostics feature
• Tornado instrumentation for versions 6 or higher
• Improved context manager API functionality and interfaces

This release also drops support for Python 3.4.

The agent can be installed using easy_install/pip/distribute via the Python Package Index or can be downloaded directly from the New Relic download site.

Event loop diagnostics

Introducing event loop diagnostics for asyncio! The Python agent can now surface information about transactions that block the event loop. The agent will be able to generate information about transactions that have waited a significant amount of time to acquire control of the event loop.

Event loop diagnostic information will be available in both APM and via NRQL query.

Event loop metrics will appear in the transaction Breakdown table:

Time spent waiting on other transactions will be shown in the transaction Trace details page, as shown here:

eventLoopTime and eventLoopWait attributes will be available via NRQL query. An example query might be:
SELECT count(*) as 'count', average(eventLoopTime) as 'loopTime', average(eventLoopWait) as 'loopWait' FROM Transaction facet name

In New Relic Insights, this might show a result like this:

Diagnostics will be available by default through our existing aiohttp, sanic, and Tornado instrumentation. Diagnostic information will also be available for coroutines that use our background_task and web_transaction decorator APIs.

Tornado 6 Instrumentation

Instrumentation for Tornado framework version 6.x is supported without any feature flags. Support for versions earlier than Tornado 6.x has been dropped. The Tornado web server, framework, and http client are instrumented and information will show up in both APM and insights.

Important: Using the tornado.gen.coroutine with instrumentation is not supported. Any usage of tornado.gen.coroutine should be replaced with an asyncio coroutine.

Before

class MainHandler(tornado.web.RequestHandler):
    @tornado.gen.coroutine
    def get(self):

        yield gen.sleep(0.2)

After

class MainHandler(tornado.web.RequestHandler):
    @asyncio.coroutine
    def get(self):

        yield from gen.sleep(0.2)

Improved APIs for time trace context managers

Context managers (such as FunctionTrace, ExternalTrace, DatastoreTrace) may now be used from within asyncio coroutines! Additionally, the transaction argument is no longer used for any context manager API. In order to transition to the new API, the transaction argument must be removed.

Before

transaction = newrelic.agent.current_transaction()
with newrelic.agent.FunctionTrace(transaction, "my_trace"):
  pass

After

with newrelic.agent.FunctionTrace("my_trace"):
  pass

Updated WebTransaction context manager

The WebTransaction context manager is no longer WSGI dependent. The context manager takes generic HTTP arguments, which you can use to build web transactions that appear in the APM product. For more information, see our API documentation.