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https://issues.apache.org/jira/browse/HDFS-4349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Shvachko updated HDFS-4349:
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Attachment: BNCanRead.patch
This is a simple test that starts NameNode, BackupNode, and three DNs reporting
to both NameNodes. It reads the same file via NN then via BN, and compares the
results.
I also added an early return statement from
{{EditLogBackupOutputStream.flushAndSync()}} in case there is nothing to flush.
Otherwise the test occasionally hits the assert in {{getFirstReadyTxId()}}.
> Test reading files from BackupNode
> ----------------------------------
>
> Key: HDFS-4349
> URL: https://issues.apache.org/jira/browse/HDFS-4349
> Project: Hadoop HDFS
> Issue Type: Test
> Components: namenode, test
> Affects Versions: 2.0.2-alpha
> Reporter: Konstantin Shvachko
> Assignee: Konstantin Shvachko
> Attachments: BNCanRead.patch
>
>
> Add a test that ensures files are readable both from NameNode and BackupNode.
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