hi i am running HBase 0.94.20 on Hadoop 2.2.0 i am working on a mapreduce job, where it reads input from a table and writes the processed back to that table and to another table, i am using MultiTableOutputFormat class for that.
while running the mapreduce job, i encounter this exception, as a result regionserver is crashing. 2014-09-02 07:56:47,790 WARN [main] org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation: Failed all from region=crawl_webpage,,1408774462347.a311e4aed343baf54f49ac6519d0bbe8., hostname=localhost, port=60020 java.util.concurrent.ExecutionException: java.io.IOException: Call to localhost/127.0.0.1:60020 failed on local exception: java.io.EOFException at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:188) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatchCallback(HConnectionManager.java:1708) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatch(HConnectionManager.java:1560) at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:994) at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:850) at org.apache.hadoop.hbase.client.HTable.put(HTable.java:826) at org.apache.hadoop.hbase.mapreduce.MultiTableOutputFormat$MultiTableRecordWriter.write(MultiTableOutputFormat.java:132) at org.apache.hadoop.hbase.mapreduce.MultiTableOutputFormat$MultiTableRecordWriter.write(MultiTableOutputFormat.java:68) at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.write(MapTask.java:634) at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89) at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112) at com.serendio.icvs.analysis.text.EntitySearcherMR$EntitySearcherMapper.map(EntitySearcherMR.java:119) at com.serendio.icvs.analysis.text.EntitySearcherMR$EntitySearcherMapper.map(EntitySearcherMR.java:33) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157) Caused by: java.io.IOException: Call to localhost/127.0.0.1:60020 failed on local exception: java.io.EOFException at org.apache.hadoop.hbase.ipc.HBaseClient.wrapException(HBaseClient.java:1047) at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:1016) at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:87) at com.sun.proxy.$Proxy12.multi(Unknown Source) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3$1.call(HConnectionManager.java:1537) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3$1.call(HConnectionManager.java:1535) at org.apache.hadoop.hbase.client.ServerCallable.withoutRetries(ServerCallable.java:229) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3.call(HConnectionManager.java:1544) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$3.call(HConnectionManager.java:1532) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: java.io.EOFException at java.io.DataInputStream.readInt(DataInputStream.java:392) at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.receiveResponse(HBaseClient.java:654) at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.run(HBaseClient.java:588) any suggestions, for overcoming this issue, thanks, yeshwanth
