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GEODE-5993: Eliminate race in monitorQueryThread() #2818

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merged 3 commits into from Nov 9, 2018

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Bill
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@Bill Bill commented Nov 9, 2018

A race existed between setting low memory in the heap monitor thread,
and checking the low memory state in query monitoring thread.

The cancelation executor was shut down and no longer accepting new
tasks when this race occurred, causing a RejectedExecutionException.

This commit solves that problem by encapsulating the scheduling
behavior using the state design pattern.

Co-authored-by: Ryan McMahon rmcmahon@pivotal.io
Co-authored-by: Bill Burcham bburcham@pivotal.io

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Assuming the tests pass I think this should be ok.

Bill and others added 3 commits November 9, 2018 14:51
A race existed between setting low memory in the heap monitor thread,
and checking the low memory state in query monitoring thread.

The cancelation executor was shut down and no longer accepting new
tasks when this race occurred, causing a RejectedExecutionException.

This commit solves that problem by encapsulating the scheduling
behavior using the state design pattern.

Co-authored-by: Ryan McMahon <rmcmahon@pivotal.io>
Co-authored-by: Bill Burcham <bburcham@pivotal.io>
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Bill commented Nov 9, 2018

DUnit tests passed in previous run except for a known issue.

Integration tests failed in previous run due to global problem (on develop branch). That's since been fixed (we think).

Rerunning tests now with the goal of seeing integration tests pass 💚

@mcmellawatt mcmellawatt merged commit aab0198 into apache:develop Nov 9, 2018
mcmellawatt added a commit to mcmellawatt/geode that referenced this pull request Nov 15, 2018
A race existed between setting low memory in the heap monitor thread,
and checking the low memory state in query monitoring thread.

The cancelation executor was shut down and no longer accepting new
tasks when this race occurred, causing a RejectedExecutionException.

This commit solves that problem by encapsulating the scheduling
behavior using the state design pattern.

Co-authored-by: Ryan McMahon <rmcmahon@pivotal.io>
Co-authored-by: Bill Burcham <bburcham@pivotal.io>
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