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Avner BenHanoch updated YARN-802: --------------------------------- Description: APPLICATION_INIT is never sent to AuxServices other than the built-in ShuffleHandler. This means that 3rd party ShuffleProvider(s) will not be able to function, because APPLICATION_INIT enables the AuxiliaryService to map jobId->userId. This is needed for properly finding the MOFs of a job per reducers' requests. NOTE: The built-in ShuffleHandler does get APPLICATION_INIT events due to hard-coded expression in hadoop code. The current TaskAttemptImpl.java code explicitly call: serviceData.put (ShuffleHandler.MAPREDUCE_SHUFFLE_SERVICEID, ...) and ignores any additional AuxiliaryService. As a result, only the built-in ShuffleHandler will get APPLICATION_INIT events. Any 3rd party AuxillaryService will never get APPLICATION_INIT events. I think a solution can be in one of two ways: 1. Change TaskAttemptImpl.java to loop on all Auxiliary Services and register each of them, by calling serviceData.put (…) in loop. 2. Change AuxServices.java similar to the fix in: MAPREDUCE-2668 "APPLICATION_STOP is never sent to AuxServices". This means that in case the 'handle' method gets APPLICATION_INIT event it will demultiplex it to all Aux Services regardless of the value in event.getServiceID(). I prefer the 2nd solution. I am welcoming any ideas. I can provide the needed patch for any option that people like. See about Pluggable Shuffle in this URL: http://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/PluggableShuffleAndPluggableSort.html was: APPLICATION_INIT is never sent to AuxServices other than the built-in ShuffleHandler. This means that 3rd party ShuffleProvider(s) will not be able to function, because APPLICATION_INIT enables the AuxiliaryService to map jobId->userId. This is needed for properly finding the MOFs of a job per reducers' requests. NOTE: The built-in ShuffleHandler does get APPLICATION_INIT events due to hard-coded expression in hadoop code. The current TaskAttemptImpl.java code explicitly call: serviceData.put (ShuffleHandler.MAPREDUCE_SHUFFLE_SERVICEID, ...) and ignores any additional AuxiliaryService. As a result, only the built-in ShuffleHandler will get APPLICATION_INIT events. Any 3rd party AuxillaryService will never get APPLICATION_INIT events. I think a solution can be in one of two ways: 1. Change TaskAttemptImpl.java to loop on all Auxiliary Services and register each of them, by calling serviceData.put (…) in loop. 2. Change AuxServices.java similar to the fix in: MAPREDUCE-2668 "APPLICATION_STOP is never sent to AuxServices". This means that in case the 'handle' method gets APPLICATION_INIT event it will demultiplex it to all Aux Services regardless of the value in event.getServiceID(). I prefer the 2nd solution. I am welcoming any ideas. I can provide the needed patch for any option that people like. > APPLICATION_INIT is never sent to AuxServices other than the builtin > ShuffleHandler > ----------------------------------------------------------------------------------- > > Key: YARN-802 > URL: https://issues.apache.org/jira/browse/YARN-802 > Project: Hadoop YARN > Issue Type: Bug > Components: applications, nodemanager > Affects Versions: 2.0.4-alpha > Reporter: Avner BenHanoch > > APPLICATION_INIT is never sent to AuxServices other than the built-in > ShuffleHandler. This means that 3rd party ShuffleProvider(s) will not be > able to function, because APPLICATION_INIT enables the AuxiliaryService to > map jobId->userId. This is needed for properly finding the MOFs of a job per > reducers' requests. > NOTE: The built-in ShuffleHandler does get APPLICATION_INIT events due to > hard-coded expression in hadoop code. The current TaskAttemptImpl.java code > explicitly call: serviceData.put (ShuffleHandler.MAPREDUCE_SHUFFLE_SERVICEID, > ...) and ignores any additional AuxiliaryService. As a result, only the > built-in ShuffleHandler will get APPLICATION_INIT events. Any 3rd party > AuxillaryService will never get APPLICATION_INIT events. > I think a solution can be in one of two ways: > 1. Change TaskAttemptImpl.java to loop on all Auxiliary Services and register > each of them, by calling serviceData.put (…) in loop. > 2. Change AuxServices.java similar to the fix in: MAPREDUCE-2668 > "APPLICATION_STOP is never sent to AuxServices". This means that in case the > 'handle' method gets APPLICATION_INIT event it will demultiplex it to all Aux > Services regardless of the value in event.getServiceID(). > I prefer the 2nd solution. I am welcoming any ideas. I can provide the > needed patch for any option that people like. > See about Pluggable Shuffle in this URL: > http://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/PluggableShuffleAndPluggableSort.html -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira