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https://issues.apache.org/jira/browse/HDFS-15108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17012223#comment-17012223
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Íñigo Goiri edited comment on HDFS-15108 at 1/9/20 8:51 PM:
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Can we do a better cleanup of the cache and just remove what we need instead of 
everything?
Otherwise, I'm fine with this approach even though is a little invasive.

Let's create a method to do String to InetSocketAddress.
In there we can cache rpcAddr.indexOf(":") and probably do a split.

Also, for the second 
{{namenodeResolver.getNamenodesForNameserviceId(NAMESERVICES[0]).get(0);}} we 
should create a new FederationNamenodeContext (namenode1).


was (Author: elgoiri):
Can we do a better cleanup of the cache and just remove what we need instead of 
everything?
Otherwise, I'm fine with this approach even though is a little invasive.

Let's create a method to do String to InetSocketAddress.
In there we can cache rpcAddr.indexOf(":") and probably do a split.

> RBF: MembershipNamenodeResolver should invalidate cache incase of active 
> namenode update
> ----------------------------------------------------------------------------------------
>
>                 Key: HDFS-15108
>                 URL: https://issues.apache.org/jira/browse/HDFS-15108
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Ayush Saxena
>            Assignee: Ayush Saxena
>            Priority: Major
>         Attachments: HDFS-15108-01.patch, HDFS-15108-02.patch
>
>
> If a failover happens, {{namenodeResolver.updateActiveNamenode(nsId, 
> address);}} is called, but this doesn't invalidates the cache, so as the next 
> time the correct active is fetched.



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