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Giovanni Matteo Fumarola commented on YARN-8696: ------------------------------------------------ Thanks [~botong] for the patch. Committed [^YARN-8696.v6.patch] to trunk and [^YARN-8696-branch-2.v6.patch] to branch-2. > [AMRMProxy] FederationInterceptor upgrade: home sub-cluster heartbeat async > --------------------------------------------------------------------------- > > Key: YARN-8696 > URL: https://issues.apache.org/jira/browse/YARN-8696 > Project: Hadoop YARN > Issue Type: Sub-task > Components: nodemanager > Reporter: Botong Huang > Assignee: Botong Huang > Priority: Major > Fix For: 3.2.0 > > Attachments: YARN-8696-branch-2.v6.patch, YARN-8696.v1.patch, > YARN-8696.v2.patch, YARN-8696.v3.patch, YARN-8696.v4.patch, > YARN-8696.v5.patch, YARN-8696.v6.patch > > > Today in _FederationInterceptor_, the heartbeat to home sub-cluster is > synchronous. After the heartbeat is sent out to home sub-cluster, it waits > for the home response to come back before merging and returning the (merged) > heartbeat result to back AM. If home sub-cluster is suffering from connection > issues, or down during an YarnRM master-slave switch, all heartbeat threads > in _FederationInterceptor_ will be blocked waiting for home response. As a > result, the successful UAM heartbeats from secondary sub-clusters will not be > returned to AM at all. Additionally, because of the fact that we kept the > same heartbeat responseId between AM and home RM, lots of tricky handling are > needed regarding the responseId resync when it comes to > _FederationInterceptor_ (part of AMRMProxy, NM) work preserving restart > (YARN-6127, YARN-1336), home RM master-slave switch etc. > In this patch, we change the heartbeat to home sub-cluster to asynchronous, > same as the way we handle UAM heartbeats in secondaries. So that any > sub-cluster down or connection issues won't impact AM getting responses from > other sub-clusters. The responseId is also managed separately for home > sub-cluster and AM, and they increment independently. The resync logic > becomes much cleaner. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org