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Posted to issues@ozone.apache.org by "Attila Doroszlai (Jira)" <ji...@apache.org> on 2023/05/31 19:06:00 UTC
[jira] [Assigned] (HDDS-8731) Standardize JVM pause monitor
[ https://issues.apache.org/jira/browse/HDDS-8731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Attila Doroszlai reassigned HDDS-8731:
--------------------------------------
Assignee: Attila Doroszlai
> Standardize JVM pause monitor
> -----------------------------
>
> Key: HDDS-8731
> URL: https://issues.apache.org/jira/browse/HDDS-8731
> Project: Apache Ozone
> Issue Type: Improvement
> Reporter: Attila Doroszlai
> Assignee: Attila Doroszlai
> Priority: Major
>
> Ozone uses JvmPauseMonitor from both Hadoop and Ratis. I think we should standardize on the one from Ratis:
> * It is automatically started for Ratis servers.
> * It has better output:
> ** more compact (single line)
> ** includes ID information
> * Ratis has more frequent releases, so it may be easier to make improvements or fixes, if needed, at the source.
> {code:title=Ratis}
> scm_1 | 2023-04-22 01:58:49,875 [JvmPauseMonitor0] INFO util.JvmPauseMonitor: JvmPauseMonitor-58db5753-a6a0-4ffc-aac9-e0d1221cc5e9: Started
> ...
> scm_1 | 2023-04-22 01:59:26,776 [JvmPauseMonitor0] WARN util.JvmPauseMonitor: JvmPauseMonitor-58db5753-a6a0-4ffc-aac9-e0d1221cc5e9: Detected pause in JVM or host machine (eg GC): pause of approximately 1393794624ns. No GCs detected.
> {code}
> {code:title=Hadoop}
> scm_1 | 2023-04-22 01:58:57,031 [org.apache.hadoop.util.JvmPauseMonitor$Monitor@45e931a9] INFO util.JvmPauseMonitor: Starting JVM pause monitor
> ...
> scm_1 | 2023-04-22 01:59:26,933 [org.apache.hadoop.util.JvmPauseMonitor$Monitor@45e931a9] INFO util.JvmPauseMonitor: Detected pause in JVM or host machine (eg GC): pause of approximately 1393ms
> scm_1 | No GCs detected
> {code}
> Proposed changes:
> # Remove usage of Hadoop JvmPauseMonitor
> # Add explicit usage of Ratis JvmPauseMonitor
> #* for services without any Ratis server (HttpFS, Recon, S3 Gateway)
> #* for services that have optional Ratis server if Ratis is disabled (OM, SCM)
> CC [~szetszwo]
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