Stamatis Zampetakis created HIVE-24438:
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Summary: Review shutdown hooks for memory leak
Key: HIVE-24438
URL: https://issues.apache.org/jira/browse/HIVE-24438
Project: Hive
Issue Type: Task
Reporter: Stamatis Zampetakis
Assignee: Stamatis Zampetakis
Shutdown hooks cannot be garbage collected till the JVM shutdown making the
application prone to memory leaks. In many cases shutdown hooks are registered
through the use of an anonymous class. If the class is created from non-static
context then the hook implicitly holds a reference to an enclosing instance
that is not always desirable and can lead to memory leak.
The goal of this issue is to review calls registering shutdown hooks and
eliminate any reference to enclosing instances if that is possible.
Check the callers of:
* ShutdownHookManager#addShutdownHook(java.lang.Runnable)
* ShutdownHookManager#addShutdownHook(java.lang.Runnable, int)
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