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https://issues.apache.org/jira/browse/HDFS-16638?focusedWorklogId=784264&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-784264
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ASF GitHub Bot logged work on HDFS-16638:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 23/Jun/22 15:12
            Start Date: 23/Jun/22 15:12
    Worklog Time Spent: 10m 
      Work Description: ZanderXu commented on PR #4480:
URL: https://github.com/apache/hadoop/pull/4480#issuecomment-1164537396

   you can also refer to 
[logging_performance](https://www.slf4j.org/faq.html#logging_performance).




Issue Time Tracking
-------------------

    Worklog Id:     (was: 784264)
    Time Spent: 50m  (was: 40m)

> Add isDebugEnabled check for debug blockLogs in BlockManager
> ------------------------------------------------------------
>
>                 Key: HDFS-16638
>                 URL: https://issues.apache.org/jira/browse/HDFS-16638
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: namenode
>            Reporter: dzcxzl
>            Priority: Trivial
>              Labels: pull-request-available
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> There are lots of concatenating Strings using blockLog.debug in BlockManager.



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