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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5371) Let client retry the same NN when "dfs.client.test.drop.namenode.response.number" is enabled
Date Sat, 09 Nov 2013 13:05:19 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13818126#comment-13818126

Hudson commented on HDFS-5371:

FAILURE: Integrated in Hadoop-Mapreduce-trunk #1604 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1604/])
HDFS-5371. Let client retry the same NN when dfs.client.test.drop.namenode.response.number
is enabled. Contributed by Jing Zhao. (jing9: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1540197)
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/retry/LossyRetryInvocationHandler.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/retry/RetryPolicies.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

> Let client retry the same NN when "dfs.client.test.drop.namenode.response.number" is
> --------------------------------------------------------------------------------------------
>                 Key: HDFS-5371
>                 URL: https://issues.apache.org/jira/browse/HDFS-5371
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: ha, test
>    Affects Versions: 3.0.0
>            Reporter: Jing Zhao
>            Assignee: Jing Zhao
>            Priority: Minor
>             Fix For: 2.3.0
>         Attachments: HDFS-5371.000.patch
> Currently when dfs.client.test.drop.namenode.response.number is enabled for testing,
the client will start failover and try the other NN. But in most of the testing cases we do
not need to trigger the client failover here since if the drop-response number is >1 the
next response received from the other NN will also be dropped. We can let the client just
simply retry the same NN.

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