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https://issues.apache.org/jira/browse/HDFS-17334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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farmmamba resolved HDFS-17334.
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Resolution: Not A Problem
> FSEditLogAsync#enqueueEdit does not synchronized this before invoke wait
> method
> -------------------------------------------------------------------------------
>
> Key: HDFS-17334
> URL: https://issues.apache.org/jira/browse/HDFS-17334
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.3.6
> Reporter: farmmamba
> Assignee: farmmamba
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.5.0
>
>
> In method FSEditLogAsync#enqueueEdit , there exist the below codes:
> {code:java}
> if (Thread.holdsLock(this)) {
> // if queue is full, synchronized caller must immediately relinquish
> // the monitor before re-offering to avoid deadlock with sync thread
> // which needs the monitor to write transactions.
> int permits = overflowMutex.drainPermits();
> try {
> do {
> this.wait(1000); // will be notified by next logSync.
> } while (!editPendingQ.offer(edit));
> } finally {
> overflowMutex.release(permits);
> }
> } {code}
> It maybe invoke this.wait(1000) without having object this's monitor.
>
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