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https://issues.apache.org/jira/browse/HDFS-15695?focusedWorklogId=518548&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-518548
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ASF GitHub Bot logged work on HDFS-15695:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Dec/20 17:20
Start Date: 01/Dec/20 17:20
Worklog Time Spent: 10m
Work Description: amahussein commented on pull request #2489:
URL: https://github.com/apache/hadoop/pull/2489#issuecomment-736697359
`TestBlockTokenWithDFSStriped` is not related. I am going to check if a new
jira should be filed for that test.
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Issue Time Tracking
-------------------
Worklog Id: (was: 518548)
Time Spent: 40m (was: 0.5h)
> NN should not let the balancer run in safemode
> ----------------------------------------------
>
> Key: HDFS-15695
> URL: https://issues.apache.org/jira/browse/HDFS-15695
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> [~daryn] reported that when the balancer moves a block, the target DN block
> reports the new location and hints to invalidate the source DN. The NN will
> not issue invalidations in safemode, so every moved block appears to be in
> excess. The data structures bloat and greatly increase the chance of a full
> GC.
> The NN should refuse to provide block locations to the balancer while in
> safemode.
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