dafu created HELIX-135:
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Summary: Not handling InterruptedException correctly in helix
Key: HELIX-135
URL: https://issues.apache.org/jira/browse/HELIX-135
Project: Apache Helix
Issue Type: Bug
Reporter: dafu
Assignee: dafu
we are not handling InterruptedException in the correct way. For example, in
HelixStateTransitionHandler, we are catching all Exceptions (including
InterruptedException) but never honor the interrupt signal by throwing
InterruptedException again or call thread.interrupt(). This prevents any helix
task to be cancelled, which in turn prevents executor thread pool to be shut
down. This is problematic, for example, in case of zk session expiry, we are
canceling leftover tasks but actually they never being cancelled and continue
to write to zk in the new session.
We need also be careful about other places where we catch InterruptedException
but not honoring it.
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