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https://issues.apache.org/jira/browse/HDFS-16075?focusedWorklogId=612142&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-612142
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ASF GitHub Bot logged work on HDFS-16075:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Jun/21 21:25
Start Date: 18/Jun/21 21:25
Worklog Time Spent: 10m
Work Description: virajjasani edited a comment on pull request #3115:
URL: https://github.com/apache/hadoop/pull/3115#issuecomment-864127746
> @virajjasani Thanks.
> It seems that the following source files have the same problem.
>
> >
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/TaskCompletionEvent.java
> >
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskCompletionEvent.java
> >
hadoop-tools/hadoop-resourceestimator/src/main/java/org/apache/hadoop/resourceestimator/common/config/ResourceEstimatorUtil.java
> >
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/CachedBlock.java
Thanks for pointing this out @ferhui. IIUC, `new TaskCompletionEvent[0]` is
being used at few places and we can replace them, however I could not see issue
with `ResourceEstimatorUtil` and `CachedBlock`. Could you please help me
understand? Thanks
Edit: Is it good to track `TaskCompletionEvent` changes in separate
MapReduce Jira?
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Issue Time Tracking
-------------------
Worklog Id: (was: 612142)
Time Spent: 50m (was: 40m)
> Use empty array constants present in StorageType and DatanodeInfo to avoid
> creating redundant objects
> -----------------------------------------------------------------------------------------------------
>
> Key: HDFS-16075
> URL: https://issues.apache.org/jira/browse/HDFS-16075
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> StorageType and DatanodeInfo already provides empty array constants. We
> should use them where possible in order to avoid creating unnecessary new
> empty array objects.
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