Keith Wall created QPID-6154:
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Summary: Handle rollback of node when use of weak durability has
allow nodes to diverge
Key: QPID-6154
URL: https://issues.apache.org/jira/browse/QPID-6154
Project: Qpid
Issue Type: Improvement
Components: Java Broker
Reporter: Keith Wall
JE throws an asynchronous exception (RolllbackException) to indicate that,
owing to the use of weak durability options a node that is trying to rejoin the
group has transactions that do not match those of the current master, and it
must rollback one or more transactions in order to join.
This condition can't occur in use of the group with default quorum options, but
if a user were to use node priority zero, electable group override or designate
primary (options that all weaken durability), creates the situation were nodes
can diverge (split brain).
In the case where JE detects this, it delivers a RollbackException
asynchronously shortly after environment creation and requires that the
environment restarts so the diverged transactions can be dropped.
Java Broker should catch this exception, log it and organise for the
environment to restart.
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