hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4578) NPE when altering a table that has moving regions
Date Thu, 20 Oct 2011 17:19:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13131785#comment-13131785
] 

stack commented on HBASE-4578:
------------------------------

@Gaojinchao Your reasoning looks good to me.
                
> NPE when altering a table that has moving regions
> -------------------------------------------------
>
>                 Key: HBASE-4578
>                 URL: https://issues.apache.org/jira/browse/HBASE-4578
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.92.0
>            Reporter: Jean-Daniel Cryans
>            Priority: Blocker
>             Fix For: 0.92.0
>
>
> I'm still not a 100% sure on the source of this error, but here's what I was able to
get twice while altering a table that was doing a bunch of splits:
> {quote}
> 2011-10-11 23:48:59,344 INFO org.apache.hadoop.hbase.master.handler.SplitRegionHandler:
Handled SPLIT report); parent=TestTable,0002608338,1318376880454.a75d6815fdfc513fb1c8aabe086c6763.
daughter a=TestTable,0002608338,1318376938764.ef170ff6cd8695dc8aec92e542dc9ac1.daughter b=TestTable,0003301408,1318376938764.36eb2530341bd46888ede312c5559b5d.
> 2011-10-11 23:49:09,579 DEBUG org.apache.hadoop.hbase.master.handler.TableEventHandler:
Ignoring table not disabled exception for supporting online schema changes.
> 2011-10-11 23:49:09,580 INFO org.apache.hadoop.hbase.master.handler.TableEventHandler:
Handling table operation C_M_MODIFY_TABLE on table TestTable
> 2011-10-11 23:49:09,612 INFO org.apache.hadoop.hbase.util.FSUtils: TableInfoPath = hdfs://sv4r11s38:9100/hbase/TestTable/.tableinfo
tmpPath = hdfs://sv4r11s38:9100/hbase/TestTable/.tmp/.tableinfo.1318376949612
> 2011-10-11 23:49:09,692 INFO org.apache.hadoop.hbase.util.FSUtils: TableDescriptor stored.
TableInfoPath = hdfs://sv4r11s38:9100/hbase/TestTable/.tableinfo
> 2011-10-11 23:49:09,693 INFO org.apache.hadoop.hbase.util.FSUtils: Updated tableinfo=hdfs://sv4r11s38:9100/hbase/TestTable/.tableinfo
to blah
> 2011-10-11 23:49:09,695 INFO org.apache.hadoop.hbase.master.handler.TableEventHandler:
Bucketing regions by region server...
> 2011-10-11 23:49:09,695 DEBUG org.apache.hadoop.hbase.client.MetaScanner: Scanning .META.
starting at row=TestTable,,00000000000000 for max=2147483647 rows
> 2011-10-11 23:49:09,709 DEBUG org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation:
The connection to hconnection-0x132f043bbde02e9 has been closed.
> 2011-10-11 23:49:09,709 ERROR org.apache.hadoop.hbase.executor.EventHandler: Caught throwable
while processing event C_M_MODIFY_TABLE
> java.lang.NullPointerException
> 	at java.util.TreeMap.getEntry(TreeMap.java:324)
> 	at java.util.TreeMap.containsKey(TreeMap.java:209)
> 	at org.apache.hadoop.hbase.master.handler.TableEventHandler.reOpenAllRegions(TableEventHandler.java:114)
> 	at org.apache.hadoop.hbase.master.handler.TableEventHandler.process(TableEventHandler.java:90)
> 	at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:168)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> {quote}
> The first time the shell reported that all the regions were updated correctly, the second
time it got stuck for a while:
> {quote}
> 6/14 regions updated.
> 0/14 regions updated.
> ...
> 0/14 regions updated.
> 2/16 regions updated.
> ...
> 2/16 regions updated.
> 8/9 regions updated.
> ...
> 8/9 regions updated.
> {quote}
> After which I killed it, redid the alter and it worked.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message