[ http://issues.apache.org/jira/browse/HADOOP-100?page=all ]
Owen O'Malley updated HADOOP-100:
---------------------------------
Attachment: task-tracker-table-locking.patch
I made the table private instead of package local.
I also wrapped each of the references to the table with a lock on the table.
There is still a lingering issue with the webapp's use of
JobTracker.taskTrackers(). If a status update comes in while the webapp is
iterating through the taskTrackers, it will get a
ConcurrentModificationException.
> Inconsistent locking of the JobTracker.taskTrackers field
> ---------------------------------------------------------
>
> Key: HADOOP-100
> URL: http://issues.apache.org/jira/browse/HADOOP-100
> Project: Hadoop
> Type: Bug
> Components: mapred
> Versions: 0.1
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Fix For: 0.1
> Attachments: task-tracker-table-locking.patch
>
> The JobTracker is using an inconsistant lock for protecting taskTrackers,
> which is the list of current task trackers. Some of the routines lock the
> JobTracker and others lock the taskTrackers field.
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