Stephan Ewen created FLINK-8856:
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Summary: Move all interrupt() calls to TaskCanceler
Key: FLINK-8856
URL: https://issues.apache.org/jira/browse/FLINK-8856
Project: Flink
Issue Type: Bug
Components: TaskManager
Reporter: Stephan Ewen
Fix For: 1.5.0
We need this to work around the following JVM bug:
https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8138622
To circumvent this problem, the {{TaskCancelerWatchDog}} must not call
{{interrupt()}} at all, but only join on the executing thread (with timeout)
and cause a hard exit once cancellation takes to long.
A user affected by this problem reported this in FLINK-8834
Personal note: The Thread.join(...) method unfortunately is not 100% reliable
as well, because it uses {{System.currentTimeMillis()}} rather than
{{System.nanoTime()}}. Because of that, sleeps can take overly long when the
clock is adjusted. I wonder why the JDK authors do not follow their own
recommendations and use {{System.nanoTime()}} for all relative time measures...
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