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https://issues.apache.org/jira/browse/HADOOP-4209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12635681#action_12635681
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Amar Kamat commented on HADOOP-4209:
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bq. An example of TaskAttemptID with JT restart can also be added in javadoc
for TaskAttemptID.
I purposefully didnt add any comment to {{TaskAttemptD}} as {{TaskAttemptD}} is
totally independent of the restart/recovery logic. Adding a line related to
restart/recovery might create some confusion. Let me know if this is not the
case. We can add it to TIP documentation and also to recovery documentation.
Thoughts?
> The TaskAttemptID should not have the JobTracker start time
> -----------------------------------------------------------
>
> Key: HADOOP-4209
> URL: https://issues.apache.org/jira/browse/HADOOP-4209
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Reporter: Owen O'Malley
> Assignee: Amar Kamat
> Priority: Blocker
> Fix For: 0.19.0
>
> Attachments: HADOOP-4209-v1.1.patch, HADOOP-4209-v1.patch
>
>
> The TaskAttemptID now includes the redundant copy of the JobTracker's start
> time as milliseconds. We should instead change the JobID to have the longer
> unique string.
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