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Posted to common-dev@hadoop.apache.org by "Ahmed Hussein (Jira)" <ji...@apache.org> on 2020/11/04 21:19:00 UTC
[jira] [Created] (HADOOP-17358) Improve excessive reloading of
Configurations
Ahmed Hussein created HADOOP-17358:
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Summary: 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
[~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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