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From Venkatesh <vramanatha...@aol.com>
Subject getting retries exhausted exception
Date Wed, 26 Jan 2011 16:44:56 GMT

 

 Using 0.20.6..any solutions? Occurs during mapper phase..will increasing retry count fix
this?
thanks

here's the stack trace

org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact region server
null for region , row '', but failed after 10 attempts.

Exceptions:

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException

java.lang.NullPointerException



    at org.apache.hadoop.hbase.client.HConnectionManager$TableServers.getRegionServerWithRetries(HConnectionManager.java:1045)

    at org.apache.hadoop.hbase.client.HTable$ClientScanner.nextScanner(HTable.java:2003)

    at org.apache.hadoop.hbase.client.HTable$ClientScanner.initialize(HTable.java:1923)

    at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:403)

    at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase$TableRecordReader.restart(TableInputFormatBase.java:110)

    at org.apache.hadoop.hbase.mapreduce.TableInputFormatBase$TableRecordReader.nextKeyValue(TableInputFormatBase.java:210)

    at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:423)

    at org.apache.hadoop.mapreduce.MapContext.nextKeyValue(MapContext.java:67)

    at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:143)

    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)

    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)

    at org.apache.hadoop.mapred.Child.main(Child.java:170)


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