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From bijieshan <bijies...@huawei.com>
Subject HRegionInfo was null or empty in -ROOT-
Date Fri, 29 Apr 2011 02:49:56 GMT
Hi,

When I execute command of 'list' in hbase shell, it told me that the HRegioninfo was null
or empty in -ROOT-.
Did the -ROOT- table value got corrupted or any other reasons cause this problem?

Here's the info from the 'list' and 'hbck' tool:
--------------------------------------------------------------------------------------------------------------------
hbase(main):001:0> list
TABLE
11/04/29 10:46:23 INFO jute.BinaryInputArchive: Expecting maxBufferString as an integer but
got as null.Hence setting to default value 1048575

ERROR: org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region
server null for region , row '', but failed after 7 attempts.
Exceptions:
java.io.IOException: HRegionInfo was null or empty in -ROOT-, row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13,
.META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
java.io.IOException: HRegionInfo was null or empty in -ROOT-, row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13,
.META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
java.io.IOException: HRegionInfo was null or empty in -ROOT-, row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13,
.META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
java.io.IOException: HRegionInfo was null or empty in -ROOT-, row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13,
.META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
java.io.IOException: HRegionInfo was null or empty in -ROOT-, row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13,
.META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
java.io.IOException: HRegionInfo was null or empty in -ROOT-, row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13,
.META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
java.io.IOException: HRegionInfo was null or empty in -ROOT-, row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13,
.META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
--------------------------------------------------------------------------------------------------------------------
HBase hbck tool:
--------------------------------------------------------------------------------------------------------------------
11/04/29 10:45:42 DEBUG client.HConnectionManager$HConnectionImplementation: locateRegionInMeta
parentTable=-ROOT-, metaLocation=address: Linux-1:60020, regioninfo: -ROOT-,,0.70236052, attempt=4
of 10 failed; retrying after sleep of 2000 because: HRegionInfo was null or empty in -ROOT-,
row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13, .META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
11/04/29 10:45:42 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:45:44 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:45:44 DEBUG client.HConnectionManager$HConnectionImplementation: locateRegionInMeta
parentTable=-ROOT-, metaLocation=address: Linux-1:60020, regioninfo: -ROOT-,,0.70236052, attempt=5
of 10 failed; retrying after sleep of 4000 because: HRegionInfo was null or empty in -ROOT-,
row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13, .META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
11/04/29 10:45:44 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:45:48 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:45:48 DEBUG client.HConnectionManager$HConnectionImplementation: locateRegionInMeta
parentTable=-ROOT-, metaLocation=address: Linux-1:60020, regioninfo: -ROOT-,,0.70236052, attempt=6
of 10 failed; retrying after sleep of 4000 because: HRegionInfo was null or empty in -ROOT-,
row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13, .META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
11/04/29 10:45:48 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:45:52 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:45:52 DEBUG client.HConnectionManager$HConnectionImplementation: locateRegionInMeta
parentTable=-ROOT-, metaLocation=address: Linux-1:60020, regioninfo: -ROOT-,,0.70236052, attempt=7
of 10 failed; retrying after sleep of 8000 because: HRegionInfo was null or empty in -ROOT-,
row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13, .META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
11/04/29 10:45:52 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:46:00 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
11/04/29 10:46:00 DEBUG client.HConnectionManager$HConnectionImplementation: locateRegionInMeta
parentTable=-ROOT-, metaLocation=address: Linux-1:60020, regioninfo: -ROOT-,,0.70236052, attempt=8
of 10 failed; retrying after sleep of 16000 because: HRegionInfo was null or empty in -ROOT-,
row=keyvalues={.META.,,1/info:server/1304015789456/Put/vlen=13, .META.,,1/info:serverstartcode/1304015789456/Put/vlen=8}
11/04/29 10:46:00 DEBUG client.HConnectionManager$HConnectionImplementation: Lookedup root
region location, connection=org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@42787d6a;
hsa=Linux-1:60020
--------------------------------------------------------------------------------------------------------------------

Thanks,

Regards,
Jieshan bean


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