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Posted to hdfs-issues@hadoop.apache.org by "Tao Li (Jira)" <ji...@apache.org> on 2024/09/18 12:48:00 UTC

[jira] [Created] (HDFS-17626) Reduce lock contention at datanode startup

Tao Li created HDFS-17626:
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             Summary: 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
         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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