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https://issues.apache.org/jira/browse/HDFS-13222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16414889#comment-16414889
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Bharat Viswanadham edited comment on HDFS-13222 at 3/27/18 2:00 AM:
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Hi [~shv]
If Balancer is upgraded after namenode, balancer discards the blocksize which
are less than minBlockSize in the old balancer. So, from behavior end, it will
not be an issue, but NN will send the blocks unnecessarily to balancer with
size greater than zero (If balancer is upgraded later).
Let me know if you still want to fix the issue or if I am missing something
here, I can open a follow-up up jira.
was (Author: bharatviswa):
Hi [~shv]
If Balancer is not upgraded, balancer discards the blocksize which are less
than minBlockSize in the old balancer. So, from behavior end, it will not be an
issue, but NN will send the blocks unnecessarily to balancer with size greater
than zero (If balancer is upgraded later).
Let me know if you still want to fix the issue or if I am missing something
here, I can open a follow-up up jira.
> Update getBlocks method to take minBlockSize in RPC calls
> ---------------------------------------------------------
>
> Key: HDFS-13222
> URL: https://issues.apache.org/jira/browse/HDFS-13222
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: balancer & mover
> Reporter: Bharat Viswanadham
> Assignee: Bharat Viswanadham
> Priority: Major
> Fix For: 3.1.0
>
> Attachments: HDFS-13222.00.patch, HDFS-13222.01.patch,
> HDFS-13222.02.patch
>
>
>
> getBlocks Using balancer parameter is done in this Jira HDFS-9412
>
> Pass the Balancer conf value from Balancer to NN via getBlocks in each RPC.
> as [~szetszwo] suggested
>
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