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From Sasha Dolgy <sasha.do...@gmail.com>
Subject HRegionServer: Failed openScanner
Date Fri, 15 May 2009 08:53:37 GMT
Hi there,

Thought I would run a count 'table-name' to see how many records are in a
table.  The count  didn't work so I went and took a look in the regionserver
log file and see the below.  Now, to be honest, not quite sure why it's just
stopped working.  The lines are from the start of the log file (from may
15).  The log file from May 14 has no errors in it.  Is there any way I can
enable debugging to find out why it's stopped working?  I had added this in
the past 36 hours but it didn't appear to cause any problems and was working
fine for atleast 24 hours:

  <property>
        <name>hbase.regionserver.class</name>
        <value>org.apache.hadoop.hbase.ipc.IndexedRegionInterface</value>
        <description>enable indexing</description>
  </property>

  <property>
        <name>hbase.regionserver.impl</name>

 <value>org.apache.hadoop.hbase.regionserver.tableindexed.IndexedRegionServer</value>
        <description>enable indexing</description>
  </property>


$HBASE_HOME/bin/stop-all.sh and $HBASE_HOME/bin/start-all.sh fixed
everything and it's all working fine again.

2009-05-15 00:55:53,090 WARN
org.apache.hadoop.hbase.regionserver.HRegionServer: unable to report to
master for 189261 milliseconds - retrying
2009-05-15 00:55:56,789 INFO
org.apache.hadoop.hbase.regionserver.HRegionServer: MSG_CALL_SERVER_STARTUP:
safeMode=false
2009-05-15 00:55:57,249 ERROR
org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
org.apache.hadoop.hbase.NotServingRegionException: .META.,,1
        at
org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:2076)
        at
org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:1710)
        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$Server.call(HBaseRPC.java:632)
        at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:912)
2009-05-15 00:55:57,252 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server
handler 9 on 60020, call openScanner([B@233dfbc1, [[B@3a5b4dfa, [B@405c7604,
9223372036854775807, null) from 127.0.0.1:47277: error:
org.apache.hadoop.hbase.NotServingRegionException: .META.,,1
org.apache.hadoop.hbase.NotServingRegionException: .META.,,1
        at
org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:2076)
        at
org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:1710)
        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$Server.call(HBaseRPC.java:632)
        at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:912)
2009-05-15 00:56:57,751 ERROR
org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
org.apache.hadoop.hbase.NotServingRegionException: .META.,,1
        at
org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:2076)
        at
org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:1710)
        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$Server.call(HBaseRPC.java:632)
        at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:912)

-- 
Sasha Dolgy
sasha.dolgy@gmail.com

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