Recently, we see many timeout failures of test_concurrent_ddls.py in S3
builds, e.g. IMPALA-10280, IMPALA-10301, IMPALA-10363. It'd be helpful
to dump the server stacktraces so we can understand why some RPCs are
slow/stuck.
This patch extracts the logic of dumping stacktraces in
script-timeout-check.sh to a separate script, dump-stacktraces.sh.
The script also dumps jstacks of HMS and NameNode. Dumping all these
stacktraces is time-consuming so we do them in parallel, which also
helps to get consistent snapshots of all servers.
When any tests in test_concurrent_ddls.py timeout, we use
dump-stacktraces.sh to dump the stacktraces before exit. Previously,
some tests depend on pytest.mark.timeout for detecting timeouts. It's
hard to add a customized callback for dumping server stacktraces. So
this patch refactors test_concurrent_ddls.py to only use timeout of
multiprocessing.
Tests:
- Tested the scripts locally.
- Verified the error handling of timeout logics in Jenkins jobs
Change-Id: I514cf2d0ff842805c0abf7211f2a395151174173
Reviewed-on: http://gerrit.cloudera.org:8080/16800
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
