Details
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Bug
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Resolution: Done
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Major
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None
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None
Description
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:
MergeView:
view={A,B,C,X,Y}
subgroups={A,B,C} {X,Y,Z}
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:
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)
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
Attachments
Issue Links
- is related to
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JGRP-1391 Compress MergeViews
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- Resolved
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