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https://issues.apache.org/jira/browse/HDFS-9643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Clampffer updated HDFS-9643:
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Attachment: HDFS-9643.HDFS-8707.002.patch
New Patch:
-FileHandle now holds weak_ptrs to BlockReaders, when CancelOperations is
called it will find all living BlockReaders and call CancelOperation on them.
This eventually results in cancel being called on the underlying
asio::tcp::socket inside of the reader's DataNodeConnection.
This should help in the case [~bobhansen] mentioned when the pipeline is
stalled waiting to time out during a network partition or something similar.
> libhdfs++: Support async cancellation of read operations
> --------------------------------------------------------
>
> Key: HDFS-9643
> URL: https://issues.apache.org/jira/browse/HDFS-9643
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs-client
> Reporter: James Clampffer
> Assignee: James Clampffer
> Attachments: HDFS-9643.HDFS-8707.000.patch,
> HDFS-9643.HDFS-8707.001.patch, HDFS-9643.HDFS-8707.002.patch
>
>
> It should be possible for any thread to cancel operations in progress on a
> FileHandle. Any ephemeral objects created by the FileHandle should free
> resources as quickly as possible.
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