MERGE2: findAllViews assumes the list returned by the discovery protocol is modifiable -------------------------------------------------------------------------------------- Key: JGRP-1373 URL: https://issues.jboss.org/browse/JGRP-1373 Project: JGroups Issue Type: Bug Affects Versions: 3.0 Reporter: Dan Berindei Assignee: Bela Ban In the Infinispan test suite we use a custom TEST_PING protocol to speed up discovery and it sometimes returns Collections.emptyList(). This triggers an UnsupportedOperationException in MERGE2: 2011-10-09 10:34:30,381 ERROR (Timer-5,Infinispan-Cluster,RehashAfterPartitionMergeTest-NodeA-56050) [org.jgroups.util.T imeScheduler2] failed executing task org.jgroups.protocols.MERGE2$1@4dbce33 java.lang.UnsupportedOperationException at java.util.AbstractList.add(AbstractList.java:148) at java.util.AbstractList.add(AbstractList.java:108) at org.jgroups.protocols.MERGE2$FindSubgroupsTask.findAllViews(MERGE2.java:325) at org.jgroups.protocols.MERGE2$FindSubgroupsTask._findAndNotify(MERGE2.java:255) at org.jgroups.protocols.MERGE2$FindSubgroupsTask.findAndNotify(MERGE2.java:246) at org.jgroups.protocols.MERGE2$1.run(MERGE2.java:202) at org.jgroups.util.TimeScheduler2$MyTask.run(TimeScheduler2.java:523) at org.jgroups.util.TimeScheduler2$Entry.execute(TimeScheduler2.java:428) at org.jgroups.util.TimeScheduler2$1.run(TimeScheduler2.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:679) -- 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