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https://issues.apache.org/jira/browse/HDFS-7648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14289822#comment-14289822
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Rakesh R commented on HDFS-7648:
--------------------------------
Ah, this is upgrade path.
{{DataStorage.java:}}
{code}
line#1036
ExecutorService linkWorkers = Executors.newFixedThreadPool(numLinkWorkers);
.
.
futures.add(linkWorkers.submit(new Callable<Void>() {
{code}
> Verify the datanode directory layout
> ------------------------------------
>
> Key: HDFS-7648
> URL: https://issues.apache.org/jira/browse/HDFS-7648
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Tsz Wo Nicholas Sze
>
> HDFS-6482 changed datanode layout to use block ID to determine the directory
> to store the block. We should have some mechanism to verify it. Either
> DirectoryScanner or block report generation could do the check.
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