Aleksandr Efimov created AMBARI-26667:
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Summary: Process-tree timeout cleanup leaves processes stopped on
Python 3.9
Key: AMBARI-26667
URL: https://issues.apache.org/jira/browse/AMBARI-26667
Project: Ambari
Issue Type: Bug
Components: ambari-agent
Affects Versions: 3.0.0
Reporter: Aleksandr Efimov
On Ambari 3.0.0 with Python 3.9, kill_process_tree passes str(signal.SIGKILL)
to killtree.sh. This evaluates to Signals.SIGKILL instead of 9. The faulty call
also remains on trunk.
When a command times out with KILL_PROCESS_TREE, killtree.sh first stops the
process tree. Its subsequent kill command rejects the symbolic argument,
leaving the processes stopped. HiveServer2 alert checks can consequently remain
stale.
The argument error can be reproduced without sending a signal:
python3.9 -c 'import signal; print(str(signal.SIGKILL))'
bash -c 'kill -l Signals.SIGKILL'
The first command prints Signals.SIGKILL; the second reports an invalid signal
specification.
Expected: timeout cleanup terminates the process tree. Pass
signal.SIGKILL.value to killtree.sh.
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