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https://issues.apache.org/jira/browse/HDFS-11643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15992825#comment-15992825
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SammiChen edited comment on HDFS-11643 at 5/2/17 12:52 PM:
-----------------------------------------------------------
Double checked the failed unit test. TestBalancer passed locally. TestStartup
and TestMetadataVersionOutput failed with & without the patch applied.
was (Author: sammi):
Double checked the failed unit test. They also failed without the patch
applied.
> Balancer fencing fails when writing erasure coded lock file
> -----------------------------------------------------------
>
> Key: HDFS-11643
> URL: https://issues.apache.org/jira/browse/HDFS-11643
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover, erasure-coding
> Affects Versions: 3.0.0-alpha1
> Reporter: Andrew Wang
> Assignee: SammiChen
> Priority: Blocker
> Labels: hdfs-ec-3.0-must-do
> Attachments: HDFS-11643.001.patch, HDFS-11643.002.patch,
> HDFS-11643.003.patch, HDFS-11643.004.patch, HDFS-11643.005.patch,
> HDFS-11643.006.patch, HDFS-11643.007.patch
>
>
> At startup, the balancer writes its hostname to the lock file and calls
> hflush(). hflush is not supported for EC files, so this fails when the entire
> filesystem is erasure coded.
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