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From "Bibin A Chundatt (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-6554) MRAppMaster servicestart failing with NPE in MRAppMaster#parsePreviousJobHistory
Date Sat, 21 Nov 2015 07:35:11 GMT
Bibin A Chundatt created MAPREDUCE-6554:
-------------------------------------------

             Summary: MRAppMaster servicestart failing  with NPE in MRAppMaster#parsePreviousJobHistory
                 Key: MAPREDUCE-6554
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6554
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Bibin A Chundatt
            Assignee: Bibin A Chundatt
            Priority: Critical


Create scenario so that MR app master gets preempted.
On next MRAppMaster launch tried to recover previous job history file {{MRAppMaster#parsePreviousJobHistory}}


{noformat}
2015-11-21 13:52:27,722 INFO [main] org.apache.hadoop.service.AbstractService: Service org.apache.hadoop.mapreduce.v2.app.MRAppMaster
failed in state STARTED; cause: java.lang.NullPointerException
java.lang.NullPointerException
        at java.io.StringReader.<init>(StringReader.java:50)
        at org.apache.avro.Schema$Parser.parse(Schema.java:917)
        at org.apache.avro.Schema.parse(Schema.java:966)
        at org.apache.hadoop.mapreduce.jobhistory.EventReader.<init>(EventReader.java:75)
        at org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.parse(JobHistoryParser.java:139)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.parsePreviousJobHistory(MRAppMaster.java:1256)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.processRecovery(MRAppMaster.java:1225)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.serviceStart(MRAppMaster.java:1087)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$4.run(MRAppMaster.java:1570)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1673)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.initAndStartAppMaster(MRAppMaster.java:1566)
        at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.main(MRAppMaster.java:1499)
2015-11-21 13:52:27,725 INFO [main] org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler:
Stopping JobHistoryEventHandler. Size of the outstanding queue size is 0

{noformat}

EventReader(EventReader stream)
{noformat}
 this.version = in.readLine();
...
 this.schema = parser.parse(in.readLine());
{noformat}

check for null and return {{IOException}} in {{parser.parse(in.readLine())}}




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