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https://issues.apache.org/jira/browse/HADOOP-17358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17703886#comment-17703886
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ASF GitHub Bot commented on HADOOP-17358:
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OpsHubTech closed pull request #5504: HADOOP-17358
URL: https://github.com/apache/hadoop/pull/5504
> Improve excessive reloading of Configurations
> ---------------------------------------------
>
> Key: HADOOP-17358
> URL: https://issues.apache.org/jira/browse/HADOOP-17358
> Project: Hadoop Common
> Issue Type: Bug
> Components: conf
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.2.2, 3.3.1, 3.4.0, 2.10.2, 3.2.3
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> [~daryn] reported that adding a new resource to a conf forces a complete
> reload of the conf instead of just loading the new resource. Instantiating a
> {{SSLFactory}} adds a new resource for the ssl client/server file. Formerly
> only the KMS client used the SSLFactory but now TLS/RPC uses it too.
> The reload is so costly that RM token cancellation falls behind by hours or
> days. The accumulation of uncancelled tokens in the KMS rose from a few
> thousand to hundreds of thousands which risks ZK scalability issues causing a
> KMS outage.
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