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https://issues.apache.org/jira/browse/HDFS-17626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoqiao He resolved HDFS-17626.
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Fix Version/s: 3.5.0
Hadoop Flags: Reviewed
Resolution: Fixed
> Reduce lock contention at datanode startup
> ------------------------------------------
>
> Key: HDFS-17626
> URL: https://issues.apache.org/jira/browse/HDFS-17626
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Tao Li
> Assignee: Tao Li
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.5.0
>
> Attachments: image-2024-09-18-20-45-56-999.png
>
>
> During the datanode startup process, there is a debug log, because there is
> no LOG.isDebugEnabled() guard, so even if debug is not enabled, the read lock
> will be obtained. The guard should be added here to reduce lock contention.
> !image-2024-09-18-20-45-56-999.png|width=333,height=263!
> !https://docs.corp.vipshop.com/uploader/f/4DSEukZKf6cV5VRY.png?accessToken=eyJhbGciOiJIUzI1NiIsImtpZCI6ImRlZmF1bHQiLCJ0eXAiOiJKV1QifQ.eyJleHAiOjE3MjY2NjQxNjYsImZpbGVHVUlEIjoiQWxvNE5uOU9OYko2aDJ4WCIsImlhdCI6MTcyNjY2MzU2NiwiaXNzIjoidXBsb2FkZXJfYWNjZXNzX3Jlc291cmNlIiwidXNlcklkIjo2MTYyMTQwfQ.DwDBnJ6I8vCFd14A-wsq2oLU5a0rcPoUvq49Z4aWg2A|width=334,height=133!
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