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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/01/13 06:50:59 UTC
[jira] Updated: (HBASE-1121) Cluster confused about where -ROOT- is
[ https://issues.apache.org/jira/browse/HBASE-1121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-1121:
-------------------------
Attachment: 1121.patch
Better logging in HCM so can try to tell whats happening around rediscovery of -ROOT- location
> Cluster confused about where -ROOT- is
> --------------------------------------
>
> Key: HBASE-1121
> URL: https://issues.apache.org/jira/browse/HBASE-1121
> Project: Hadoop HBase
> Issue Type: Bug
> Environment: TRUNK trying to do big upload
> Reporter: stack
> Attachments: 1121.patch
>
>
> Each node in cluster is doing below:
> {code}
> 2009-01-11 20:52:22,739 [regionserver/0:0:0:0:0:0:0:0:60020.compactor] DEBUG org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Attempt 0 of 10 failed with <org.apache.hadoop.hbase.NotServingRegionException: org.apache.hadoop.hbase.NotServingRegionException: -ROOT-,,0
> at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:2064)
> at org.apache.hadoop.hbase.regionserver.HRegionServer.getClosestRowBefore(HRegionServer.java:1545)
> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:632)
> at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:894)
> >. Retrying after sleep of 20002009-01-11 20:52:22,742 [regionserver/0:0:0:0:0:0:0:0:60020.compactor] DEBUG org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Found ROOT REGION => {NAME => '-ROOT-,,0', STARTKEY => '', ENDKEY => '', ENCODED => 70236052, TABLE => {{NAME => '-ROOT-', IS_ROOT => 'true', IS_META => 'true', FAMILIES => [{NAME => 'info', BLOOMFILTER => 'false', COMPRESSION => 'NONE', VERSIONS => '10', LENGTH => '2147483647', TTL => '-1', IN_MEMORY => 'false', BLOCKCACHE => 'true'}], INDEXES => []}}2009-01-11 20:52:24,759 [regionserver/0:0:0:0:0:0:0:0:60020.compactor] DEBUG org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Attempt 1 of 10 failed with <org.apache.hadoop.hbase.NotServingRegionException: org.apache.hadoop.hbase.NotServingRegionException: -ROOT-,,0
> at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:2064)
> at org.apache.hadoop.hbase.regionserver.HRegionServer.getClosestRowBefore(HRegionServer.java:1545)
> at sun.reflect.GeneratedMethodAccessor17.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.hbase.ipc.HBaseRPC$Server.call(HBaseRPC.java:632)
> at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:894)
> {code}
> I tried to close the root region and tripped over hbase-1120.
> So I killed the regionserver hosting -ROOT- but weirdly had no effect as though the regionservers' internal cache of -ROOT- location cannot be changed.
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