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https://issues.apache.org/jira/browse/HDFS-11032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rakesh R updated HDFS-11032:
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Component/s: (was: namenode)
> [SPS]: Handling of block movement failure at the coordinator datanode
> ---------------------------------------------------------------------
>
> Key: HDFS-11032
> URL: https://issues.apache.org/jira/browse/HDFS-11032
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Rakesh R
> Assignee: Rakesh R
>
> The idea of this jira is to discuss and implement an efficient failure(block
> movement failure) handling logic at the datanode cooridnator. [Code
> reference|https://github.com/apache/hadoop/blob/HDFS-10285/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/StoragePolicySatisfyWorker.java#L243].
> Following are the possible errors during block movement:
> # Network errors(IOException) - provide retries(may be a hard coded 2 time
> retries) if the block storage movement is failed due to network errors. If
> its still end up with errors after 2 retries then marked as failure/retry to
> NN.
> # No disk space(IOException) - no retries maked as failure/retry to NN.
> # Block pinned - no retries marked as success/no-retry to NN. It is not
> possible to relocate this block to another datanode.
> # Gen_Stamp mismatches - no retries marked as failure/retry to NN. Could be a
> case that the file might have re-opened.
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