Stephan Ewen created FLINK-4625:
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Summary: Guard Flink processes against blocking shutdown hooks
Key: FLINK-4625
URL: https://issues.apache.org/jira/browse/FLINK-4625
Project: Flink
Issue Type: Improvement
Components: Distributed Coordination
Affects Versions: 1.1.2
Reporter: Stephan Ewen
Assignee: Stephan Ewen
Fix For: 1.2.0
Resource managers like YARN send the JVM the {{SIGTERM}} signal to kill the
process, if it wants to terminate a process.
With {{SIGTERM}}, the JVM shutdown hooks run, and may cause the process to
freeze up on shutdown. Especially since all dependencies (like Hadoop) may
install shutdown hooks (and do so), it is not in Flink's control to make sure
all Shutdown hooks are well behaved.
I propose to add a guard that forcibly terminates the JVM if clean shutdown
does not succeed within a certain time (say five seconds).
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