We've seen this at times too and would be interested to know what causes it. Until you get a better answer, one thing we found helps is to move the region via the hbase shell. For us clients would be able to scan the region once it has moved.
On Fri, Dec 28, 2012 at 2:00 AM, satish verma <satish.bigd...@gmail.com>wrote: > 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 >
