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Rohith commented on MAPREDUCE-4950: ----------------------------------- In my cluster Hadoop-2.3, I too encounterd with similar exception.JobHistoryEvents write failed. I am not pretty sure what is cause for the reason.:-( {noformat} 2014-02-21 22:10:33,841 INFO [Thread-355] org.apache.hadoop.service.AbstractService: Service JobHistoryEventHandler failed in state STOPPED; cause: org.apache.avro.AvroTypeException: Attempt to process a enum when a string was expected. org.apache.avro.AvroTypeException: Attempt to process a enum when a string was expected. at org.apache.avro.io.parsing.Parser.advance(Parser.java:93) at org.apache.avro.io.JsonEncoder.writeEnum(JsonEncoder.java:217) at org.apache.avro.specific.SpecificDatumWriter.writeEnum(SpecificDatumWriter.java:54) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:67) at org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:106) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:66) at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:58) at org.apache.hadoop.mapreduce.jobhistory.EventWriter.write(EventWriter.java:66) at org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler$MetaInfo.writeEvent(JobHistoryEventHandler.java:870) at org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler.handleEvent(JobHistoryEventHandler.java:517) at org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler.serviceStop(JobHistoryEventHandler.java:332) at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221) at org.apache.hadoop.service.ServiceOperations.stop(ServiceOperations.java:52) at org.apache.hadoop.service.ServiceOperations.stopQuietly(ServiceOperations.java:80) at org.apache.hadoop.service.CompositeService.stop(CompositeService.java:159) at org.apache.hadoop.service.CompositeService.serviceStop(CompositeService.java:132) at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.serviceStop(MRAppMaster.java:1386) at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221) at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.shutDownJob(MRAppMaster.java:550) at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$JobFinishEventHandler$1.run(MRAppMaster.java:602) {noformat} > MR App Master fails to write the history due to AvroTypeException > ----------------------------------------------------------------- > > Key: MAPREDUCE-4950 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4950 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: jobhistoryserver, mr-am > Reporter: Devaraj K > Priority: Critical > > {code:xml} > 2013-01-19 19:31:27,269 INFO [AsyncDispatcher event handler] > org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler: In stop, > writing event MAP_ATTEMPT_STARTED > 2013-01-19 19:31:27,269 INFO [AsyncDispatcher event handler] > org.apache.hadoop.yarn.service.CompositeService: Error stopping > JobHistoryEventHandler > org.apache.avro.AvroTypeException: Attempt to process a enum when a > array-start was expected. > at org.apache.avro.io.parsing.Parser.advance(Parser.java:93) > at org.apache.avro.io.JsonEncoder.writeEnum(JsonEncoder.java:210) > at > org.apache.avro.specific.SpecificDatumWriter.writeEnum(SpecificDatumWriter.java:54) > at > org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:66) > at > org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:104) > at > org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:65) > at > org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:57) > at > org.apache.hadoop.mapreduce.jobhistory.EventWriter.write(EventWriter.java:66) > at > org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler$MetaInfo.writeEvent(JobHistoryEventHandler.java:825) > at > org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler.handleEvent(JobHistoryEventHandler.java:517) > at > org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler.stop(JobHistoryEventHandler.java:346) > at > org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:99) > at > org.apache.hadoop.yarn.service.CompositeService.stop(CompositeService.java:89) > at > org.apache.hadoop.mapreduce.v2.app.MRAppMaster$JobFinishEventHandler.handle(MRAppMaster.java:445) > at > org.apache.hadoop.mapreduce.v2.app.MRAppMaster$JobFinishEventHandler.handle(MRAppMaster.java:406) > at > org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:126) > at > org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:75) > at java.lang.Thread.run(Thread.java:662) > 2013-01-19 19:31:27,271 INFO [AsyncDispatcher event handler] > org.apache.hadoop.mapreduce.v2.app.MRAppMaster: Deleting staging directory > hdfs://hacluster /root/staging-dir/root/.staging/job_1358603069474_0135 > {code} -- This message was sent by Atlassian JIRA (v6.1.5#6160)