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Fix issue when metrics are not available #1207

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merged 3 commits into from
Oct 6, 2020

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codeboten
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@codeboten codeboten commented Oct 6, 2020

Description

Not all configured metrics are available on all operating systems, added a hasattr call before calling the observer.

Fixes #1206

Type of change

Please delete options that are not relevant.

  • Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Ran the instrumentation manually again after the change, error messages were gone.

Checklist:

  • Followed the style guidelines of this project
  • Changelogs have been updated
  • Unit tests have been added
  • Documentation has been updated

Alex Boten added 2 commits October 5, 2020 20:55
Not all configured metrics are available on all operating
systems, added a hasattr call before calling the observer.
@codeboten codeboten requested a review from a team October 6, 2020 04:04
observer.observe(
getattr(times, metric), self._system_cpu_time_labels
)
if hasattr(times, metric):
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How about getattr here followed by a check for None? Would save one attribute lookup if/when on hotpath.

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This would be a good optimization, I thought about it but then I remembered the default interval for this instrumentation was to collect metrics every 30 seconds. Can definitely be improved when it becomes an issue

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Curious which operating system did not have these metrics?

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Curious which operating system did not have these metrics?

The bug has more details regarding which metrics, but MacOS had a few metrics unavailable, so I just added a check for hasattr everywhere.

@codeboten codeboten merged commit f9218ca into open-telemetry:master Oct 6, 2020
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System Metrics instrumentation shows Exception messages
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