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https://issues.apache.org/jira/browse/HDFS-12773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16238076#comment-16238076
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Íñigo Goiri commented on HDFS-12773:
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Internally, we use the ZooKeeper implementation from HDFS-10631.
[~xkrogen] did a deployment with the HDFS implementation and had a bunch of
issues with multiple writers.
These improvements should take of this.
> RBF: Improve State Store FS implementation
> ------------------------------------------
>
> Key: HDFS-12773
> URL: https://issues.apache.org/jira/browse/HDFS-12773
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
>
> HDFS-10630 introduced a filesystem implementation of the State Store for unit
> tests. However, this implementation doesn't handle multiple writers
> concurrently.
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