[infinispan-issues] [JBoss JIRA] (ISPN-2096) Duplicate join requests break destabilizes the cluster

[Robby Grossman (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-2096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12711896#comment-12711896 ] 

Robby Grossman commented on ISPN-2096:
--------------------------------------

Michal - Can you please clarify: was this a bug with your configuration or the stock configuration? Your comment makes me think the former, but from the fact that I see a "fix version" I infer the latter. We're seeing this same problem with Infinispan 5.1.5 and I'd love to get it fixed if possible.
                
> Duplicate join requests break destabilizes the cluster
> ------------------------------------------------------
>
>                 Key: ISPN-2096
>                 URL: https://issues.jboss.org/browse/ISPN-2096
>             Project: Infinispan
>          Issue Type: Bug
>          Components: State transfer
>    Affects Versions: 5.1.5.FINAL
>            Reporter: Dan Berindei
>            Assignee: Dan Berindei
>             Fix For: 5.2.0.ALPHA3
>
>
> When the coordinator receives a {{CacheViewControlCommand(REQUEST_JOIN)}} command from a node that's already a member of the cache, it should just ignore it. Currently it tries to install a new cache view with a duplicate member, and the new cache view installation fails with this error:
> {noformat}
> [13:37:08,442] [WARN] (CacheViewControlCommand.java:141) - ISPN000071: Caught exception when handling command CacheViewControlCommand{cache=Demo, type=PREPARE_VIEW, sender=ppl-poz-nb0074/testy, newViewId=2, newMembers=[PPL-POZ-NB0074-33316, PPL-POZ-NB0074-33316], oldViewId=1, oldMembers=[PPL-POZ-NB0074-33316]}
> java.lang.IllegalStateException: Cannot prepare new view CacheView{viewId=2, members=[PPL-POZ-NB0074-33316, PPL-POZ-NB0074-33316]} on cache Demo, we are currently preparing view CacheView{viewId=2, members=[PPL-POZ-NB0074-33316, PPL-POZ-NB0074-33316]}
>     at org.infinispan.cacheviews.CacheViewInfo.prepareView(CacheViewInfo.java:102)
>     at org.infinispan.cacheviews.CacheViewsManagerImpl.handlePrepareView(CacheViewsManagerImpl.java:481)
>     at org.infinispan.commands.control.CacheViewControlCommand.perform(CacheViewControlCommand.java:126)
> {noformat}

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