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https://issues.apache.org/jira/browse/HDFS-14390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16819585#comment-16819585
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Ashvin commented on HDFS-14390:
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Thanks for reviewing [~daryn].
I posted a new patch, [^HDFS-14390.005.patch]. This patch does not include
{{FSTreeWalk}} changes as they are not needed for fixing the issue.
Regarding test verification, the current test is not creating any files. This
is because in absence of the kerberos annotation,
{{TestSecureAliasMap.testSecureConnectionToAliasMap}} will fail to create
{{BlockAliasMap.Reader reader}} and the test will fail with the following
error. Accordingly I think the unit test is reliably verifying the connection.
I am inclining towards not complicating the unit test with alias map creation
details.
{{java.io.IOException: Unable to retrieve InMemoryAliasMap for block pool id
BP-1267604097-10.84.180.32-1555451080089}}{{ }}{{at
org.apache.hadoop.hdfs.server.common.blockaliasmap.impl.InMemoryLevelDBAliasMapClient.getAliasMap(InMemoryLevelDBAliasMapClient.java:173)}}{{at
org.apache.hadoop.hdfs.server.common.blockaliasmap.impl.InMemoryLevelDBAliasMapClient.getReader(InMemoryLevelDBAliasMapClient.java:180)}}{{at
org.apache.hadoop.hdfs.server.aliasmap.TestSecureAliasMap.testSecureConnectionToAliasMap(TestSecureAliasMap.java:198)}}
> Provide kerberos support for AliasMap service used by Provided storage
> ----------------------------------------------------------------------
>
> Key: HDFS-14390
> URL: https://issues.apache.org/jira/browse/HDFS-14390
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Ashvin
> Assignee: Ashvin
> Priority: Major
> Attachments: HDFS-14390.001.patch, HDFS-14390.002.patch,
> HDFS-14390.003.patch, HDFS-14390.004.patch, HDFS-14390.005.patch
>
>
> With {{PROVIDED}} storage (-HDFS-9806)-, HDFS can address data stored in
> external storage systems. This feature is not supported in a secure HDFS
> cluster. The {{AliasMap}} service does not support kerberos, and as a result
> the cluster nodes will fail to communicate with it. This JIRA is to enable
> kerberos support for the {{AliasMap}} service.
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