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https://issues.apache.org/jira/browse/HBASE-8535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13658324#comment-13658324
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Eric Yu commented on HBASE-8535:
--------------------------------
@stack Yes, this change is meant to correct a flaw in the
testDeleteForZKConnLeak where it will occassionally fail for versions 0.95 and
0.98. On internalClose, HConnection implementation marks itself as closed and
then closes watcher. So the test fails if it checks after the connection is
marked as closed but before the watcher is closed. The test doesn't have access
to the object used internally by HConnection to synchronize so I added a delay
that double checks whether the watcher is closed if watcher was still open. I
didn't always delay every time because I didn't want to slow down the test too
much.
> Test for zk leak does not account for unsynchronized access to zk watcher
> -------------------------------------------------------------------------
>
> Key: HBASE-8535
> URL: https://issues.apache.org/jira/browse/HBASE-8535
> Project: HBase
> Issue Type: Test
> Components: Client
> Affects Versions: 0.98.0, 0.95.1
> Reporter: Eric Yu
> Fix For: 0.98.0, 0.95.1
>
> Attachments: HBASE-8535.patch
>
>
> Test can detect a live zk connection in a closed hconnection because it does
> not accesses the zk watcher in a synchronized manner.
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