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Posted to yarn-issues@hadoop.apache.org by "Sunil G (JIRA)" <ji...@apache.org> on 2017/04/26 14:17:04 UTC
[jira] [Comment Edited] (YARN-6523) RM requires large memory in
sending out security tokens as part of Node Heartbeat in large cluster
[ https://issues.apache.org/jira/browse/YARN-6523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15984853#comment-15984853 ]
Sunil G edited comment on YARN-6523 at 4/26/17 2:16 PM:
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Yes. Its ideal to keep a copy of apps tokens on each RMNodeImpl itself. I think RMNodeImpl could pull renewed tokens from {{DelegationTokenRenewer}} at regular intervals if there is a concern over increased number of events to be fired to RMNodeImpl regarding token renewal. I still feel an event publishing model will be more concrete.
was (Author: sunilg):
Yes. Its ideal to keep a copy on each RMNodeImpl itself. I think RMNodeImpl could pull for renewed tokens from {{DelegationTokenRenewer]} at regular intervals if there is a concern over increased number of events to be fired to RMNodeImpl regarding token renewal. I still feel an event publishing model will be more concrete.
> RM requires large memory in sending out security tokens as part of Node Heartbeat in large cluster
> --------------------------------------------------------------------------------------------------
>
> Key: YARN-6523
> URL: https://issues.apache.org/jira/browse/YARN-6523
> Project: Hadoop YARN
> Issue Type: Bug
> Components: RM
> Affects Versions: 2.8.0, 2.7.3
> Reporter: Naganarasimha G R
> Assignee: Naganarasimha G R
> Priority: Critical
>
> Currently as part of heartbeat response RM sets all application's tokens though all applications might not be active on the node. On top of it NodeHeartbeatResponsePBImpl converts tokens for each app into SystemCredentialsForAppsProto. Hence for each node and each heartbeat too many SystemCredentialsForAppsProto objects were getting created.
> We hit a OOM while testing for 2000 concurrent apps on 500 nodes cluster with 8GB RAM configured for RM
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