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https://reviews.apache.org/r/43285/
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Review request for mesos and Vinod Kone.
Bugs: MESOS-4614
https://issues.apache.org/jira/browse/MESOS-4614
Repository: mesos
Description
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This change fixes the flakiness in this test. The issue was a race between the
`connected` callback being called before we did `process::spawn` to start the
process.
The details of the race that lead to the failure are as follows:
- We started the executor library inside the constructor of `TestExecutor`. The
callback function did `process::defer(self(), &Self::connected)`
- The `connected` callback can be invoked by the Executor library before we got
a chance to actually invoke `process::spawn` on the `TestExecutor` process
itself. This in can turn lead to the `dispatch` being silently dropped.
https://github.com/apache/mesos/blob/master/3rdparty/libprocess/src/process.cpp#L2456
This change now starts the library inside the `initialize` function that is
gurranteed to be called after `process::spawn` is invoked.
Diffs
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src/examples/test_http_executor.cpp 4916e0ebb7215d911556561a8560d78a1192001c
Diff: https://reviews.apache.org/r/43285/diff/
Testing
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make check + The flakiness is really easy to reproduce under load:
- Run the tests with `stress --cpu 4 --timeout 120` running in the background.
Thanks,
Anand Mazumdar
