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Posted to hdfs-dev@hadoop.apache.org by "Andrew Wang (JIRA)" <ji...@apache.org> on 2017/05/09 21:30:04 UTC
[jira] [Reopened] (HDFS-11644) Support for querying outputstream
capabilities
[ https://issues.apache.org/jira/browse/HDFS-11644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Wang reopened HDFS-11644:
--------------------------------
> Support for querying outputstream capabilities
> ----------------------------------------------
>
> Key: HDFS-11644
> URL: https://issues.apache.org/jira/browse/HDFS-11644
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: erasure-coding
> Affects Versions: 3.0.0-alpha1
> Reporter: Andrew Wang
> Assignee: Manoj Govindassamy
> Labels: hdfs-ec-3.0-must-do
> Fix For: 3.0.0-alpha3
>
> Attachments: HDFS-11644.01.patch, HDFS-11644.02.patch, HDFS-11644.03.patch, HDFS-11644-branch-2.01.patch
>
>
> FSDataOutputStream#hsync checks if a stream implements Syncable, and if so, calls hsync. Otherwise, it just calls flush. This is used, for instance, by YARN's FileSystemTimelineWriter.
> DFSStripedOutputStream extends DFSOutputStream, which implements Syncable. However, DFSStripedOS throws a runtime exception when the Syncable methods are called.
> We should refactor the inheritance structure so DFSStripedOS does not implement Syncable.
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