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https://issues.apache.org/jira/browse/HDFS-16699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18036435#comment-18036435
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ASF GitHub Bot commented on HDFS-16699:
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github-actions[bot] closed pull request #4663: HDFS-16699: RBF: Update Observer
NameNode state to Active when failover
URL: https://github.com/apache/hadoop/pull/4663
> RBF: Router Update Observer NameNode state to Active when failover because of
> sockeTimeOut Exception
> ------------------------------------------------------------------------------------------------------
>
> Key: HDFS-16699
> URL: https://issues.apache.org/jira/browse/HDFS-16699
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: rbf
> Affects Versions: 3.1.1
> Reporter: ShuangQi Xia
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> we found that ,router print logs that indicate Observer NameNode state
> changed to active always,here's the log
> 2022-03-18 11:00:54,589 | INFO | NamenodeHeartbeatService hacluster 11342-0
> | NN registration state has changed:
> test101:25019->hacluster:11342:test103:25000-ACTIVE ->
> test102:25019->hacluster:11342::test103:25000-OBSERVER |
> MembershipStoreImpl.java:170
> for code ,I fount that , when router request failed for some reson ,like
> sockettimeout Excetion , failover to Observer NameNode，will update it's
> state to Active
> if (failover) {
> // Success on alternate server, update
> InetSocketAddress address = client.getAddress();
> namenodeResolver.updateActiveNamenode(nsId, address);
> }
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