Java: Add java/javautilconcurrentscheduledthreadpoolexecutor query for zero thread pool size
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java/ql/src/Likely Bugs/Concurrency/ScheduledThreadPoolExecutorZeroThread.ql
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...uery-tests/ScheduledThreadPoolExecutorZeroThread/ScheduledThreadPoolExecutorZeroThread.qlref
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java/ql/src/Likely Bugs/Concurrency/ScheduledThreadPoolExecutorZeroThread.ql
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owen-mc
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Jun 25, 2025
java/ql/src/Likely Bugs/Concurrency/ScheduledThreadPoolExecutorZeroThread.ql
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michaelnebel
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Jun 25, 2025
java/ql/src/Likely Bugs/Concurrency/ScheduledThreadPoolExecutorZeroThread.md
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Co-authored-by: Michael Nebel <[email protected]>
owen-mc
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Jun 26, 2025
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This pull request introduces a new query to identify potential issues with setting the
corePoolSizeofScheduledThreadPoolExecutorto zero, which may lead to unintended behavior and programmer error. The changes include adding the query logic, documentation, test cases, and integration into the query suite.MRVA top 100 only reports 4 alerts. I checked autofix on 3 of these. Two autofix suggestions completely removed the
executor.setCorePoolSize(0)calls, the third one changed the 0 value toSchedulers.DEFAULT_POOL_SIZE, which is the value used insetMaximumPoolSize.