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Jian He commented on YARN-2964: ------------------------------- bq. Once the token was stashed in the set, subsequent attempts from sub-jobs to store the token would silently be ignored because the token was already in the set. After digging into the code, I found even if we are not canceling the token if the flag is set, we still remove the token from the global set. This means that if sub-jobs doesn't set the flag, it'll be added to the global set again and once the sub-job finishes the token is canceled. I'm wondering how this worked before, [~jlowe], [~daryn] could you shed some light on this ? > RM prematurely cancels tokens for jobs that submit jobs (oozie) > --------------------------------------------------------------- > > Key: YARN-2964 > URL: https://issues.apache.org/jira/browse/YARN-2964 > Project: Hadoop YARN > Issue Type: Bug > Components: resourcemanager > Affects Versions: 2.6.0 > Reporter: Daryn Sharp > Assignee: Jian He > Priority: Blocker > > The RM used to globally track the unique set of tokens for all apps. It > remembered the first job that was submitted with the token. The first job > controlled the cancellation of the token. This prevented completion of > sub-jobs from canceling tokens used by the main job. > As of YARN-2704, the RM now tracks tokens on a per-app basis. There is no > notion of the first/main job. This results in sub-jobs canceling tokens and > failing the main job and other sub-jobs. It also appears to schedule > multiple redundant renewals. > The issue is not immediately obvious because the RM will cancel tokens ~10 > min (NM livelyness interval) after log aggregation completes. The result is > an oozie job, ex. pig, that will launch many sub-jobs over time will fail if > any sub-jobs are launched >10 min after any sub-job completes. If all other > sub-jobs complete within that 10 min window, then the issue goes unnoticed. -- This message was sent by Atlassian JIRA (v6.3.4#6332)