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https://issues.apache.org/jira/browse/HDFS-15350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17105474#comment-17105474
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Hudson commented on HDFS-15350:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #18237 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/18237/])
HDFS-15350. Set dfs.client.failover.random.order to true as default. (github:
rev 928b81a5339a3d91e77b268d825973a0d9efc1ab)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverReadProxyProvider.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/client/HdfsClientConfigKeys.java
> Set dfs.client.failover.random.order to true as default
> -------------------------------------------------------
>
> Key: HDFS-15350
> URL: https://issues.apache.org/jira/browse/HDFS-15350
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Reporter: Takanobu Asanuma
> Assignee: Takanobu Asanuma
> Priority: Major
> Fix For: 3.4.0
>
>
> {noformat}
> Currently, the default value of dfs.client.failover.random.order is
> false. If it's true, clients access to NameNodes random order instead
> of the configured order which is defined in hdfs-site.xml.
> Setting dfs.client.failover.random.order=true is very important for
> RBF if there are multiple routers. If it's false, all the clients
> point to the same router because routers are always active.
> And I think dfs.client.failover.random.order=true would be good manner
> for normal HA(two-NameNodes) Cluster too. If it's false and the first
> NameNode is standby, clients always access to standby NameNode at
> first.
> So I'd like to set dfs.client.failover.random.order to true as default
> from 3.4. Does anyone have any concerns?
> {noformat}
> https://lists.apache.org/thread.html/ra79dde30235a1d302ea82120de8829c0aa7d6c0789f4613430610b8a%40%3Chdfs-dev.hadoop.apache.org%3E
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