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https://issues.apache.org/jira/browse/HBASE-8535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13658612#comment-13658612
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stack commented on HBASE-8535:
------------------------------
Hmm... the hang seems to originate in the test this patch fixes. Search for
'before: client.TestHCM#testDeleteForZKConnLeak' in the output above.
The test falls into a loop about here:
{code}
2013-05-15 16:07:44,351 WARN [pool-1-thread-1]
zookeeper.RecoverableZooKeeper(237): Possibly transient ZooKeeper,
quorum=localhost:54737,
exception=org.apache.zookeeper.KeeperException$ConnectionLossException:
KeeperErrorCode = ConnectionLoss for /hbase/meta-region-server
2013-05-15 16:07:44,351 INFO [pool-1-thread-1] util.RetryCounter(54): Sleeping
2000ms before retry #1...
2013-05-15 16:07:44,351 DEBUG [pool-1-thread-1-EventThread]
zookeeper.ZooKeeperWatcher(377): hconnection-0x10ea988-0x13ea8f23825000e
connected
2013-05-15 16:07:44,352 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,354 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,355 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,356 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,359 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,360 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,362 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,364 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,365 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,366 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,366 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,367 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,368 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,369 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
2013-05-15 16:07:44,370 INFO [test-hcm-delete-pool-267-thread-1]
client.HConnectionManager$HConnectionImplementation(609): ClusterId is
default-cluster
....
{code}
If you want to punt to me that is fine Eric, just say, and I'll open a new
issue to dig in on it (minimally we should never spew as we do above the same
INFO log every miliisecond.
> 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
> Assignee: stack
> 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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