Paulo Motta created CASSANDRA-11713:
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Summary: Add ability to log thread dump when thread pool is
full/blocked
Key: CASSANDRA-11713
URL: https://issues.apache.org/jira/browse/CASSANDRA-11713
Project: Cassandra
Issue Type: Improvement
Components: Observability
Reporter: Paulo Motta
Assignee: Paulo Motta
Priority: Minor
Thread dumps are very useful for troubleshooting thread pool contention issues
like CASSANDRA-11363 and CASSANDRA-11529.
While they could be generated externally with {{jstack}}, sometimes the
conditions are transient and it's hard to catch the exact moment when they
happen, so it could be useful to generate and log them upon user request when
certain internal condition happens.
I propose adding a {{logThreadDumpOnNextContention}} JMX flag to
{{SEPExecutor}} and {{JMXEnabledThreadPoolExecutor}} that when enabled
generates and logs a single thread dump on the system log when the thread pool
queue is full.
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