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https://issues.apache.org/jira/browse/HDFS-11884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Clampffer updated HDFS-11884:
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Parent Issue: HDFS-14032 (was: HDFS-8707)
> libhdfs++: Make use of socket wrappers consistent
> -------------------------------------------------
>
> Key: HDFS-11884
> URL: https://issues.apache.org/jira/browse/HDFS-11884
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: James Clampffer
> Assignee: James Clampffer
> Priority: Major
>
> Different areas of the code alternate between hdfs::async_stream (and
> derivatives) and the more direct asio::ip::tcp::socket. I propose getting
> the code to consistently do socket IO through the async_stream style classes.
> -async_stream's async_read and async_write are virtual so we can get rid of
> classes that template the socket type to support trait injection for mock
> tests
> -async_stream can have debug info attached to it e.g. a human readable host
> and port. Extra info about status of the stream clears the way for
> implementing a DN connection cache + bookkeeping how many sockets are in use.
> -gives a chance to have a mutex serialize read and write operations. Not
> needed in current use cases but can be used to assert that there aren't
> concurrent reads and writes to the same socket happening unintentionally
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