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https://issues.apache.org/jira/browse/HBASE-8394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-8394.
--------------------------
Resolution: Incomplete
This API is not in hdfs 1.1 nor in 2.0. I do not know how the API is supposed
to help. Do I have to go research in referenced issues? Read source code? The
issue is about lease recovery? Do I not call lease recovery if isFileClosed
says it is closed?
Closing as incomplete. After spending some time hereabouts I cannot tell what
this issue is about. The edit above does little to clarify.
> Utilize isFileClosed() so that the wait for lease recovery can be optimized
> ---------------------------------------------------------------------------
>
> Key: HBASE-8394
> URL: https://issues.apache.org/jira/browse/HBASE-8394
> Project: HBase
> Issue Type: Improvement
> Reporter: Ted Yu
>
> In HDFS-4525, the following API was added:
> {code}
> /**
> * Get the close status of a file
> * @param src The path to the file
> *
> * @return return true if file is closed
> * @throws FileNotFoundException if the file does not exist.
> * @throws IOException If an I/O error occurred
> */
> public boolean isFileClosed(Path src) throws IOException {
> {code}
> It is not available in hadoop 1.1 at the moment.
> In HBASE-8389, there was discussion for utilizing isFileClosed() to optimize
> the wait time for lease recovery.
> Subsequent lease recovery request for the same Path would preempt outstanding
> recovery. But if we wait for one particular recovery request to complete
> without limit on duration, we may incur penalty due to various failure
> scenarios such as the primary Data Node chosen by Namenode being stale, etc.
> This JIRA continues the work for 0.95 / trunk.
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