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https://issues.apache.org/jira/browse/MAPREDUCE-4043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13234093#comment-13234093
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Jason Lowe commented on MAPREDUCE-4043:
---------------------------------------
The tasks can workaround the problem by reading the appTokens file that was
pushed to HDFS when the job was launched. For example:
{code}
Credentials cred = Credentials.readTokenStorageFile(new
Path(jobConf.get("mapreduce.job.dir"), "appTokens"), jobConf);
byte[] secretKey = cred.getSecretKey(SECRET_KEY_ALIAS);
{code}
> Secret keys set in Credentials are not seen by tasks
> ----------------------------------------------------
>
> Key: MAPREDUCE-4043
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4043
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/streaming, mrv2
> Affects Versions: 0.23.2
> Reporter: Jason Lowe
> Priority: Blocker
>
> The following scenario works in 0.20.205 but no longer works in 0.23:
> 1) During job submission, a secret key is set by calling
> jobConf.getCredentials().addSecretKey(Text, byte[])
> 2) A map task retrieves the secret key by calling
> jobConf.getCredentials().getSecretKey(Text)
> In 205 the secret key is retrieved successfully but in 0.23 the secret key is
> missing.
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