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https://issues.apache.org/jira/browse/HADOOP-13123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15277398#comment-15277398
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Matthew Paduano commented on HADOOP-13123:
------------------------------------------
{code}
2016-05-09 16:12:18,733 [ERROR] [main] |app.DAGAppMaster|: Error starting
DAGAppMaster
java.io.IOException: Exception reading
/tmp/hadoop-llu/nm-local-dir/usercache/llu/appcache/application_1462833671675_0001/container_e03_1462833671675_0001_01_000001/container_tokens
at
org.apache.hadoop.security.Credentials.readTokenStorageFile(Credentials.java:197)
at
org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:789)
at
org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:748)
at
org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:621)
at org.apache.tez.dag.app.DAGAppMaster.main(DAGAppMaster.java:2345)
Caused by: java.io.IOException: Unknown version 1 in token storage.
at
org.apache.hadoop.security.Credentials.readTokenStorageStream(Credentials.java:*215*)
at
org.apache.hadoop.security.Credentials.readTokenStorageFile(Credentials.java:*194*)
... 4 more
{code}
note that the file line numbers in the stack trace complaining of "unknown
version 1" correspond to pre-dtutil code.
> Permit the default hadoop delegation token file format to be configurable
> -------------------------------------------------------------------------
>
> Key: HADOOP-13123
> URL: https://issues.apache.org/jira/browse/HADOOP-13123
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Matthew Paduano
> Assignee: Matthew Paduano
>
> If one environment updates to using the new dtutil code and accompanying
> Credentials code, there is a backward compatibility issue with the default
> file format being JAVA. Older clients need to be updated to ask for a file
> in the legacy format (FORMAT_JAVA).
> As an aid to users in this trap, we can add a configuration property to set
> the default file format. When set to FORMAT_JAVA, the new server code will
> serve up legacy files without being asked. The default value for this
> property will remain FORMAT_PB. But affected users can add this config
> option to the services using the newer code.
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