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https://issues.apache.org/jira/browse/YARN-3841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16779874#comment-16779874
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Hudson commented on YARN-3841:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #16086 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/16086/])
YARN-3841 [atsv2 Storage implementation] Adding retry semantics to HDFS
(vrushali: rev ea3cdc60b39d96702c0bce292829914c25bc0d8e)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/test/java/org/apache/hadoop/yarn/server/timelineservice/storage/TestFileSystemTimelineWriterImpl.java
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/FileSystemTimelineWriterImpl.java
> [Storage implementation] Adding retry semantics to HDFS backing storage
> -----------------------------------------------------------------------
>
> Key: YARN-3841
> URL: https://issues.apache.org/jira/browse/YARN-3841
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Tsuyoshi Ozawa
> Assignee: Abhishek Modi
> Priority: Major
> Labels: YARN-5355, atsv2
> Fix For: 3.3.0
>
> Attachments: YARN-3841-YARN-7055.002.patch, YARN-3841.001.patch,
> YARN-3841.002.patch, YARN-3841.003.patch, YARN-3841.004.patch,
> YARN-3841.005.patch, YARN-3841.006.patch, YARN-3841.007.patch,
> YARN-3841.008.patch, YARN-3841.009.patch
>
>
> HDFS backing storage is useful for following scenarios.
> 1. For Hadoop clusters which don't run HBase.
> 2. For fallback from HBase when HBase cluster is temporary unavailable.
> Quoting ATS design document of YARN-2928:
> {quote}
> In the case the HBase
> storage is not available, the plugin should buffer the writes temporarily
> (e.g. HDFS), and flush
> them once the storage comes back online. Reading and writing to hdfs as the
> the backup storage
> could potentially use the HDFS writer plugin unless the complexity of
> generalizing the HDFS
> writer plugin for this purpose exceeds the benefits of reusing it here.
> {quote}
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