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https://issues.apache.org/jira/browse/HDFS-3688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419416#comment-13419416
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Jason Lowe commented on HDFS-3688:
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Patch failed on trunk since it's only for 23. Manually ran test-patch for this
on branch-0.23, here's the output:
{noformat}
-1 overall.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 3 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 eclipse:eclipse. The patch built with eclipse:eclipse.
+1 findbugs. The patch does not introduce any new Findbugs (version )
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
-1 core tests. The patch failed these unit tests:
org.apache.hadoop.hdfs.TestDatanodeBlockScanner
+1 contrib tests. The patch passed contrib unit tests.
{noformat}
The test failure appears to be unrelated, and when I ran the test again
manually it passed. I believe this test is known to have some races in it, see
HDFS-2881.
> Namenode loses datanode hostname if datanode re-registers
> ---------------------------------------------------------
>
> Key: HDFS-3688
> URL: https://issues.apache.org/jira/browse/HDFS-3688
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 0.23.3
> Reporter: Jason Lowe
> Attachments: HDFS-3688.patch
>
>
> If a datanode ever re-registers with the namenode (e.g.: namenode restart,
> temporary network cut, etc.) then the datanode ends up registering with an IP
> address as the datanode name rather than the hostname.
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