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https://issues.apache.org/jira/browse/HDFS-16243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17421924#comment-17421924
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Renukaprasad C commented on HDFS-16243:
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Thanks [~zhttylz] for the issue & the patch.
LOG.warn("Configured reserved space is higher than Disk capacity"); - Here can
you print values as well.
I think you created patch for the specific version. Is it applicable to trunk
as well?
Also, you can raise a PR, which will be easier for review & trace.
> The available disk space is less than the reserved space, and no log message
> is displayed
> -----------------------------------------------------------------------------------------
>
> Key: HDFS-16243
> URL: https://issues.apache.org/jira/browse/HDFS-16243
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.7.2
> Reporter: Hualong Zhang
> Priority: Major
> Attachments: HDFS-16243.patch
>
>
> When I submitted a task to the hadoop test cluster, it appeared "could only
> be replicated to 0 nodes instead of minReplication (=1)"
> I checked the namenode and datanode logs and did not find any error logs. It
> was not until the use of dfsadmin -report that the available capacity was 0
> and I realized that it may be a configuration problem.
> Checking the configuration found that the value of the
> "dfs.datanode.du.reserved" configuration is greater than the available disk
> space of HDFS, which caused this problem
> It seems that there should be some warnings or errors in the log.
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