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https://issues.apache.org/jira/browse/HDFS-11956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16051084#comment-16051084
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Andrew Wang commented on HDFS-11956:
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LGTM, though we should also add an entry to hdfs-default.xml as documentation
for this new option, and some of the checkstyles look fixable. Would appreciate
if you could validate that the failed unit tests are unrelated (sadly, there
are a lot).
[~chris.douglas] do you want to review as well?
> Fix BlockToken compatibility with Hadoop 2.x clients
> ----------------------------------------------------
>
> Key: HDFS-11956
> URL: https://issues.apache.org/jira/browse/HDFS-11956
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0-alpha4
> Reporter: Andrew Wang
> Assignee: Ewan Higgs
> Priority: Blocker
> Attachments: HDFS-11956.001.patch, HDFS-11956.002.patch
>
>
> Seems like HDFS-9807 broke backwards compatibility with Hadoop 2.x clients.
> When talking to a 3.0.0-alpha4 DN with security on:
> {noformat}
> 2017-06-06 23:27:22,568 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
> Block token verification failed: op=WRITE_BLOCK,
> remoteAddress=/172.28.208.200:53900, message=Block token with StorageIDs
> [DS-c0f24154-a39b-4941-93cd-5b8323067ba2] not valid for access with
> StorageIDs []
> {noformat}
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