[HADOOP-3403] Job tracker's ExpireTackers thread gets NullPointerException if a tasktracker is lost.

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.18.0
• Fix Version/s: 0.18.0
• Hadoop Flags: Reviewed
• Assignee: Arun Murthy
• Reporter: Amareshwari Sriramadasu
• Created: 16/May/08 07:51
• Updated: 08/Jul/09 16:52
• Resolved: 22/May/08 04:06

Description

JobTracker's ExpireTrackers gets NullPOinterException, if a tasktracker is lost.
JobTracker's log shows the following:

2008-05-16 04:48:08,170 INFO org.apache.hadoop.mapred.JobTracker: Lost tracker 'tracker_XXXXX.com:XXXXX.com/98.136.100.125:58462'
2008-05-16 04:48:08,170 INFO org.apache.hadoop.mapred.TaskInProgress: Error from attempt_200805160431_0001_m_000001_0: Lost task tracker: tracker_XXXXX.com:XXXXX.com/98.136.100.125:58462
2008-05-16 04:48:08,171 ERROR org.apache.hadoop.mapred.JobTracker: Tracker Expiry Thread got exception: java.lang.NullPointerException
at org.apache.hadoop.mapred.JobInProgress.failedTask(JobInProgress.java:1489)
at org.apache.hadoop.mapred.JobInProgress.updateTaskStatus(JobInProgress.java:537)
at org.apache.hadoop.mapred.JobInProgress.failedTask(JobInProgress.java:1595)
at org.apache.hadoop.mapred.JobTracker.lostTaskTracker(JobTracker.java:2079)
at org.apache.hadoop.mapred.JobTracker$ExpireTrackers.run(JobTracker.java:301)
at java.lang.Thread.run(Thread.java:619)

Issue Links

• relates to: HADOOP-3333 job failing because of reassigning same tasktracker to failing tasks