Address flakiness in command/exec tests #4517
Merged
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Several of the command/exec tests were consistently flaky and reporting the following errors:
These are associated with a race between bootstrapping the test agent and actions like creating a session.
With the WaitForTestAgent helper function we now wait for the new node (and its check) to be registered in the catalog.
Also, there was some flakiness around the timeouts in TestExecCommand_StreamResults, so the channel reads were wrapped in retries.
After making all these changes the tests in command/exec have consistently passed in the repro environment.