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https://issues.apache.org/jira/browse/HDFS-5676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated HDFS-5676:
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Attachment: HDFS-5676.001.patch
also make CachingStrategy immutable. this makes it easier to reason about the
synchronization
> fix inconsistent synchronization of CachingStrategy
> ---------------------------------------------------
>
> Key: HDFS-5676
> URL: https://issues.apache.org/jira/browse/HDFS-5676
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 2.4.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Attachments: HDFS-5676.001.patch
>
>
> Currently, the synchronization for {{CachingStrategy}} is a little
> inconsistent. DFSOutputStream#setDropBehind modifies the strategy object,
> but there's nothing protecting that object against concurrent use in
> {{createBlockOutputStream}}. Similarly, {{DFSInputStream#setDropBehind}} is
> synchronized, but not all the uses of {{cachingStrategy}} are.
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