Keith Wall created QPID-6201:
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Summary: BDB state change events must be delivered sequential to
the virtualhostnode
Key: QPID-6201
URL: https://issues.apache.org/jira/browse/QPID-6201
Project: Qpid
Issue Type: Bug
Components: Java Broker
Affects Versions: 0.30
Reporter: Keith Wall
Fix For: 0.31
The ReplicatedEnvironmentFacade uses a thread pool executor to deliver JE state
change notifications up to the BDBHAVHN. JE requires this - it stipulates you
should do minimal work in these callbacks. These events (transitions to
replica, master etc) need to be delivered sequentially to the node in order for
the BDBHAVHN to behave correctly.
Unfortunately a coding error has accidentally assigned this to a thread pool
with multiple threads, meaning this may not be the case.
This has been seen to cause a group in a state where a VHN was in the MASTER
role, but its underlying virtual host remained UNAVAILABLE.
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