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From "Eric Badger (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-11094) TestLargeBlockReport fails intermittently
Date Thu, 10 Nov 2016 20:09:59 GMT

     [ https://issues.apache.org/jira/browse/HDFS-11094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Eric Badger updated HDFS-11094:
    Attachment: HDFS-11094.002.patch

The tests that failed are related to this patch. They depend on the datanode *not* being able
to heartbeat correctly, so the test will timeout when this fix is put in. Additionally, upon
further review it looks like the cluster is actually waiting for the heartbeat to be received.
The race is between the test checking for the active NN and the HAState getting set after
a heartbeat response is received by the data node. After talking with [~daryn], I think that
allowing the NN to send back its HA state during registration is the best way to fix this.
This way the datanodes will always know the HAState of the NN that they are connected to.

I'm attaching a patch that adds the HAServiceState of the NN to the NamespaceInfo that gets
sent from the NN to the DN during a versionRequest. This is one of the first things that happens
during a DN-NN connection setup and happens even before registration of the DN. 

[~daryn], [~liuml07], can you please review? Thanks

> TestLargeBlockReport fails intermittently
> -----------------------------------------
>                 Key: HDFS-11094
>                 URL: https://issues.apache.org/jira/browse/HDFS-11094
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Eric Badger
>            Assignee: Eric Badger
>         Attachments: HDFS-11094.001.patch, HDFS-11094.002.patch
> {noformat}
> java.lang.NullPointerException: null
> 	at org.apache.hadoop.hdfs.server.datanode.TestLargeBlockReport.testBlockReportSucceedsWithLargerLengthLimit(TestLargeBlockReport.java:96)
> {noformat}

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