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From satish verma <satish.bigd...@gmail.com>
Subject Re: muti-thread mapreduce
Date Wed, 26 Dec 2012 08:07:08 GMT
Hi

 I am using a MR job on Hbase . I am getting this sort of error on a few
region servers. Can someone explain what this means and what should I do ?

 Thanks.

12/12/26 03:03:18 INFO mapred.JobClient: Task Id :
attempt_201210121702_699686_m_000046_0, Status : FAILED
org.apache.hadoop.hbase.client.RetriesExhaustedException: Trying to contact
region server b-app-80.ssprod:65520 for region
webpage_production,9c3583e2e97d7845288f6792ed641e60,1343757929164, row
'9c3583e2e97d7845288f6792ed641e60', but failed after 10 attempts.
Exceptions:
java.io.IOException: java.io.IOException: Could not seek
StoreFileScanner[HFileScanner for reader
reader=hdfs://b-hadoop-master.ssprod:54310/hbase/webpage_production/1629342332/tm/7630213467863536608,
compression=gz, inMemory=false,
firstKey=9c3583e2e97d7845288f6792ed641e60/tm:eid/1337397152960/Put,
lastKey=a05d22c20c779e39dffc28fe86053408/tm:url/1352931877105/Put,
avgKeyLen=49, avgValueLen=38, entries=4091448, length=75747961, cur=null]
    at
org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:104)
    at
org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:77)
    at
org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:1408)
    at org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner

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