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https://issues.apache.org/jira/browse/NETBEANS-334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16339314#comment-16339314
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Svatopluk Dedic commented on NETBEANS-334:
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https://github.com/sdedic/incubator-netbeans/commit/ea44a1959b472107e62327af07f524943311752a
> RequestProcessor does not prevent from accidental Thread.contextClassLoader
> changes
> -----------------------------------------------------------------------------------
>
> Key: NETBEANS-334
> URL: https://issues.apache.org/jira/browse/NETBEANS-334
> Project: NetBeans
> Issue Type: Bug
> Components: platform - Other
> Affects Versions: 8.2
> Reporter: Svatopluk Dedic
> Assignee: Svatopluk Dedic
> Priority: Major
>
> In run tasks in a dedicated RequestProcessor; sometimes the task gets an
> unexpected context ClassLoader in the worker thread. The RequestProcessor
> code tries to remember the context CL in effect when it enqueues a Runnable.
> But it seems that the remembered CL is only applied if a new Processor
> (thread) is immediately available within the RP's limits. If the task is
> enqueued for later execution because limited RP's throughput, the CL is not
> set to the Processor prior to execution of the task.
> The value of Thread.currentThread().getContrextClassLoader() is therefore
> undefined in code run within RP. If some other task that was incidentally
> run by the same thread-Processor does not clean up its changes of context CL,
> the messed up CL will be used for subsequent unrelated tasks processed by
> that thread.
> The source however suggests that the original idea was to transfer both
> (global) Lookup and context classloader to the worker code.
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