Bernd Mathiske created MESOS-3743:
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Summary: Provide diagnostic output in agent log when fetching fails
Key: MESOS-3743
URL: https://issues.apache.org/jira/browse/MESOS-3743
Project: Mesos
Issue Type: Bug
Components: fetcher
Reporter: Bernd Mathiske
Assignee: Bernd Mathiske
Priority: Minor
Fix For: 0.26.0
When fetching fails, the fetcher has written log output to stderr in the task
sandbox, but it is not easy to get to. It may even be impossible to get to if
one only has the agent log available and no more access to the sandbox. This is
for instance the case when looking at output from a CI run.
The fetcher actor in the agent detects if the external fetcher program claims
to have succeeded or not. When it exits with an error code, we could grab the
fetcher log from the stderr file in the sandbox and append it to the agent log.
This is similar to this patch: https://reviews.apache.org/r/37813/
The difference is that the output of the latter is triggered by test failures
outside the fetcher, whereas what is proposed here is triggering upon failures
inside the fetcher.
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