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Alejandro Abdelnur commented on MAPREDUCE-5663: ----------------------------------------------- [~sseth], [~acmurthy], why this is needed, if the AM has the corresponding delegation tokens, things work just fine, Oozie has been doing this for years; the splits are computed in the launcher job which does not have kerberos credentials. > Add an interface to Input/Ouput Formats to obtain delegation tokens > ------------------------------------------------------------------- > > Key: MAPREDUCE-5663 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5663 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Reporter: Siddharth Seth > Assignee: Michael Weng > Attachments: MAPREDUCE-5663.4.txt, MAPREDUCE-5663.5.txt, > MAPREDUCE-5663.6.txt, MAPREDUCE-5663.patch.txt, MAPREDUCE-5663.patch.txt2, > MAPREDUCE-5663.patch.txt3 > > > Currently, delegation tokens are obtained as part of the getSplits / > checkOutputSpecs calls to the InputFormat / OutputFormat respectively. > This works as long as the splits are generated on a node with kerberos > credentials. For split generation elsewhere (AM for example), an explicit > interface is required. -- This message was sent by Atlassian JIRA (v6.1.5#6160)