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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-6416) hbck dies on NPE when a region folder exists but the table does not
Date Sat, 19 Oct 2013 19:28:10 GMT

     [ https://issues.apache.org/jira/browse/HBASE-6416?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-6416:
-------------------------

    Fix Version/s:     (was: 0.96.0)
                   0.96.1

> hbck dies on NPE when a region folder exists but the table does not
> -------------------------------------------------------------------
>
>                 Key: HBASE-6416
>                 URL: https://issues.apache.org/jira/browse/HBASE-6416
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jean-Daniel Cryans
>             Fix For: 0.96.1
>
>         Attachments: hbase-6416.patch, hbase-6416-v1.patch
>
>
> This is what I'm getting for leftover data that has no .regioninfo
> First:
> {quote}
> 12/07/17 23:13:37 WARN util.HBaseFsck: Failed to read .regioninfo file for region null
> java.io.FileNotFoundException: File does not exist: /hbase/stumble_info_urlid_user/bd5f6cfed674389b4d7b8c1be227cb46/.regioninfo
> 	at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1822)
> 	at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.<init>(DFSClient.java:1813)
> 	at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:544)
> 	at org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:187)
> 	at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:456)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.loadHdfsRegioninfo(HBaseFsck.java:611)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.access$2200(HBaseFsck.java:140)
> 	at org.apache.hadoop.hbase.util.HBaseFsck$WorkItemHdfsRegionInfo.call(HBaseFsck.java:2882)
> 	at org.apache.hadoop.hbase.util.HBaseFsck$WorkItemHdfsRegionInfo.call(HBaseFsck.java:2866)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
> 	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> {quote}
> Then it hangs on:
> {quote}
> 12/07/17 23:13:39 INFO util.HBaseFsck: Attempting to handle orphan hdfs dir: hdfs://sfor3s24:10101/hbase/stumble_info_urlid_user/bd5f6cfed674389b4d7b8c1be227cb46
> 12/07/17 23:13:39 INFO util.HBaseFsck: checking orphan for table null
> Exception in thread "main" java.lang.NullPointerException
> 	at org.apache.hadoop.hbase.util.HBaseFsck$TableInfo.access$100(HBaseFsck.java:1634)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.adoptHdfsOrphan(HBaseFsck.java:435)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.adoptHdfsOrphans(HBaseFsck.java:408)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.restoreHdfsIntegrity(HBaseFsck.java:529)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.offlineHdfsIntegrityRepair(HBaseFsck.java:313)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.onlineHbck(HBaseFsck.java:386)
> 	at org.apache.hadoop.hbase.util.HBaseFsck.main(HBaseFsck.java:3227)
> {quote}
> The NPE is sent by:
> {code}
> Preconditions.checkNotNull("Table " + tableName + "' not present!", tableInfo);
> {code}
> I wonder why the condition checking was added if we don't handle it... In any case hbck
dies but it hangs because there are some non-daemon hanging around.



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