Dan Berindei created ISPN-2096: ---------------------------------- Summary: 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.ALPHA1 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} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jboss.org/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira