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https://issues.apache.org/jira/browse/MAPREDUCE-2764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13138012#comment-13138012
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Hudson commented on MAPREDUCE-2764:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk #876 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/876/])
Move HADOOP-7668, HADOOP-7509, HADOOP-7745, MAPREDUCE-2764, HADOOP-7766 and
HADOOP-7721 entries from trunk to 0.23 in CHANGES.txt.
szetszwo :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1190132
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
> Fix renewal of dfs delegation tokens
> ------------------------------------
>
> Key: MAPREDUCE-2764
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2764
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Daryn Sharp
> Assignee: Owen O'Malley
> Fix For: 0.20.205.0, 0.23.0, 0.24.0
>
> Attachments: MAPREDUCE-2764-2.patch, MAPREDUCE-2764-3.patch,
> MAPREDUCE-2764-4.patch, MAPREDUCE-2764-trunk.patch,
> MAPREDUCE-2764-trunk.patch, MAPREDUCE-2764-trunk.patch, MAPREDUCE-2764.patch,
> delegation.patch, token-renew-trunk.patch, token-renew.patch,
> token-renew.patch
>
>
> The JT may have issues renewing hftp tokens which disrupt long distcp jobs.
> The problem is the JT's delegation token renewal code is built on brittle
> assumptions. The token's service field contains only the "ip:port" pair.
> The renewal process assumes that the scheme must be hdfs. If that fails due
> to a {{VersionMismatchException}}, it tries https based on another assumption
> that it must be hftp if it's not hdfs. A number of other exceptions, most
> commonly {{IOExceptions}}, can be generated which fouls up the renewal since
> it won't fallback to https.
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