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Steve Loughran commented on YARN-2487: -------------------------------------- link to YARN-624; gang scheduling problem > Need to support timeout of AM When no containers are assigned to it for a > defined period > ---------------------------------------------------------------------------------------- > > Key: YARN-2487 > URL: https://issues.apache.org/jira/browse/YARN-2487 > Project: Hadoop YARN > Issue Type: Improvement > Components: resourcemanager > Reporter: Naganarasimha G R > Assignee: Naganarasimha G R > > There are some scenarios where AM will not get containers and indefinitely > waiting. We faced one such sceanrio which makes the applications to get hung > : > Consider a cluster setup which has 2 NMS of each 8GB resource, > And 2 applications(MR2) are launched in the default queue where in each AM is > taking 2 GB each. > Each AM is placed in each of the NM. Now each AM is requesting for container > of 7Gb mem resource . > As in each NM only 6GB resource is available both the applications are hung > forever. > To avoid such scenarios i would like to propose > generic timeout feature for all AM's in yarn, such that if no containers are > assigned for an application for a defined period than yarn can timeout the > application attempt. > Default can be set to 0 where in RM will not timeout the app attempt and user > can set his own timeout when he submits the application -- This message was sent by Atlassian JIRA (v6.3.4#6332)