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From "Haijun Cao (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1634) UI and shell list throw NPE
Date Tue, 14 Jul 2009 06:21:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730712#action_12730712
] 

Haijun Cao commented on HBASE-1634:
-----------------------------------

Stack,

I run the 1638 script to purge historian from info, and info from historian (yes, there is
info in historian as well). This fix the NPE problem in this ticket(1634).

But I still can't count pass region 0001192603, so I try to run hbase> deleteall '.META.',
"TestTable,0001192603" command, but it seem to cause a lot of errors in the regionserver logs.
I try to restart the hbase cluster, but can't with following error:

Trying to contact region server 10.10.30.148:60020 for region .META.,,1, row '', but failed
after 3 attempts.
Exceptions:
java.io.IOException: java.io.IOException: java.lang.IllegalArgumentException: No 44 in <$�����TestTable,0001192603info��"w?V?�"w?V?>,
length=10, offset=20
	at org.apache.hadoop.hbase.regionserver.HRegionServer.convertThrowableToIOE(HRegionServer.java:829)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.convertThrowableToIOE(HRegionServer.java:819)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:1853)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:643)
	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:913)
Caused by: java.lang.IllegalArgumentException: No 44 in <$�����TestTable,0001192603info��"w?V?�"w?V?>,
length=10, offset=20
	at org.apache.hadoop.hbase.KeyValue.getRequiredDelimiterInReverse(KeyValue.java:1226)
	at org.apache.hadoop.hbase.KeyValue$MetaKeyComparator.compareRows(KeyValue.java:1665)
	at org.apache.hadoop.hbase.KeyValue$KeyComparator.compare(KeyValue.java:1702)
	at org.apache.hadoop.hbase.KeyValue$KVComparator.compare(KeyValue.java:1325)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:133)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:124)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:114)
	at java.util.PriorityQueue.siftUpUsingComparator(PriorityQueue.java:594)
	at java.util.PriorityQueue.siftUp(PriorityQueue.java:572)
	at java.util.PriorityQueue.offer(PriorityQueue.java:274)
	at java.util.PriorityQueue.add(PriorityQueue.java:251)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap.<init>(KeyValueHeap.java:59)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:67)
	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:1390)
	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.<init>(HRegion.java:1687)
	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1077)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:1849)



> UI and shell list throw NPE
> ---------------------------
>
>                 Key: HBASE-1634
>                 URL: https://issues.apache.org/jira/browse/HBASE-1634
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>             Fix For: 0.20.0
>
>
> I have a .META. from bryan duxbury that has a row with only historian data.  List does
whole row, not just info, so if only historian entries, a row is returned.  We then try and
get a regioninfo from this row and NPE.
> As to why this happens, jd suggests that since we moved to async historian updates, row
may have been deleted already.  Confirm.

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