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Posted to issues@hbase.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2013/05/13 22:47:17 UTC
[jira] [Commented] (HBASE-8536) Possible NullPointerException in
ZKInterProcessLockBase#reapExpiredLocks
[ https://issues.apache.org/jira/browse/HBASE-8536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13656356#comment-13656356 ]
Ted Yu commented on HBASE-8536:
-------------------------------
>From https://builds.apache.org/job/PreCommit-HBASE-Build/5654/console:
{code}
[INFO] HBase ............................................. SUCCESS [2.161s]
[INFO] HBase - Common .................................... SUCCESS [35.406s]
[INFO] HBase - Protocol .................................. SUCCESS [1:24.640s]
[INFO] HBase - Client .................................... SUCCESS [44.544s]
[INFO] HBase - Prefix Tree ............................... SUCCESS [19.910s]
[INFO] HBase - Hadoop Compatibility ...................... SUCCESS [8.475s]
[INFO] HBase - Hadoop One Compatibility .................. SUCCESS [13.697s]
[INFO] HBase - Server .................................... SUCCESS [2:14.954s]
[INFO] HBase - Integration Tests ......................... SUCCESS [1.009s]
[INFO] HBase - Examples .................................. SUCCESS [56.775s]
[INFO] HBase - Assembly .................................. SUCCESS [0.021s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
{code}
> Possible NullPointerException in ZKInterProcessLockBase#reapExpiredLocks
> ------------------------------------------------------------------------
>
> Key: HBASE-8536
> URL: https://issues.apache.org/jira/browse/HBASE-8536
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Fix For: 0.98.0
>
> Attachments: 8536-v1.txt
>
>
> When I ran TestHBaseFsck, I sometimes saw:
> {code}
> testNoVersionFile(org.apache.hadoop.hbase.util.TestHBaseFsck) Time elapsed: 0.003 sec <<< ERROR!
> java.io.IOException: java.lang.NullPointerException
> at org.apache.hadoop.hbase.master.TableLockManager$ZKTableLockManager.reapAllExpiredLocks(TableLockManager.java:433)
> at org.apache.hadoop.hbase.util.hbck.TableLockChecker.fixExpiredTableLocks(TableLockChecker.java:83)
> at org.apache.hadoop.hbase.util.HBaseFsck.checkAndFixTableLocks(HBaseFsck.java:2483)
> at org.apache.hadoop.hbase.util.HBaseFsck.onlineHbck(HBaseFsck.java:460)
> at org.apache.hadoop.hbase.util.hbck.HbckTestingUtil.doFsck(HbckTestingUtil.java:65)
> at org.apache.hadoop.hbase.util.hbck.HbckTestingUtil.doFsck(HbckTestingUtil.java:41)
> at org.apache.hadoop.hbase.util.hbck.HbckTestingUtil.doFsck(HbckTestingUtil.java:36)
> at org.apache.hadoop.hbase.util.TestHBaseFsck.testNoVersionFile(TestHBaseFsck.java:1086)
> ...
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hbase.zookeeper.lock.ZKInterProcessLockBase.reapExpiredLocks(ZKInterProcessLockBase.java:393)
> at org.apache.hadoop.hbase.master.TableLockManager$ZKTableLockManager.reapAllExpiredLocks(TableLockManager.java:427)
> ... 37 more
> {code}
> This was due to null being returned from ZKUtil.listChildrenNoWatch() at line 384:
> {code}
> children = ZKUtil.listChildrenNoWatch(zkWatcher, parentLockNode);
> {code}
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