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https://issues.apache.org/jira/browse/HDFS-15633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17304860#comment-17304860
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Stephen O'Donnell commented on HDFS-15633:
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[~ayushtkn] This looks like another good one to bring back to 3.3, 3.2 and 3.1
- what do you think? I checked and the code with 3 RPC calls is present back to
at least 3.1.
> Avoid redundant RPC calls for getDiskStatus
> -------------------------------------------
>
> Key: HDFS-15633
> URL: https://issues.apache.org/jira/browse/HDFS-15633
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: dfsclient
> Reporter: Ayush Saxena
> Assignee: Ayush Saxena
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> There are 3 RPC calls to fetch the same values :
> {code:java}
> public FsStatus getDiskStatus() throws IOException {
> return new FsStatus(getStateByIndex(0),
> getStateByIndex(1), getStateByIndex(2));
> }
> {code}
> {{getStateByIndex()}} is called thrice, which is actually a {{getStats}} RPC
> to namenode, The same could have been achieved by just one call
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