[jboss-jira] [JBoss JIRA] (JGRP-1707) MergeView: marshalling fails when subgroups are not a subset of members

MergeView: marshalling fails when subgroups are not a subset of members ----------------------------------------------------------------------- Key: JGRP-1707 URL: https://issues.jboss.org/browse/JGRP-1707 Project: JGroups Issue Type: Bug Reporter: Bela Ban Assignee: Bela Ban Fix For: 3.4 When we have 2 partitions \{A,B,C\} and \{X,Y,Z\} and they merge, but one of the members (e.g. Z) is excluded from the merge (e.g. because it is involved in a different merge already), we create the following MergeView: {noformat} MergeView: view={A,B,C,X,Y} subgroups={A,B,C} {X,Y,Z} {noformat} Because the members of the subgroups refer to the merge view via index, the index for Z is -1, and thus - when unmarshalled - Z points to a null creator, which triggers the following stack trace: {noformat} 00631037-49819: failed handling incoming message java.lang.IllegalArgumentException: creator cannot be null at org.jgroups.ViewId.<init>(ViewId.java:32) at org.jgroups.ViewId.<init>(ViewId.java:42) at org.jgroups.View.create(View.java:90) at org.jgroups.MergeView.readFrom(MergeView.java:119) at org.jgroups.protocols.pbcast.GMS$GmsHeader.readFrom(GMS.java:1285) at org.jgroups.Message.readHeader(Message.java:889) at org.jgroups.Message.readFrom(Message.java:803) at org.jgroups.protocols.TP.readMessageBatch(TP.java:1796) at org.jgroups.protocols.TP.receive(TP.java:1463) at org.jgroups.protocols.UDP$PacketReceiver.run(UDP.java:683) at java.lang.Thread.run(Unknown Source) {noformat} SOLUTION: * When marshalling a MergeView, and a subgroup member has no corresponding member in {{members}}, then send the *address* instead of the index * OR: remove all members from subgroups which are not in {{members}}