QMF errors ignored by cluster, causing cluster de-sync
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Key: QPID-3796
URL: https://issues.apache.org/jira/browse/QPID-3796
Project: Qpid
Issue Type: Bug
Components: C++ Broker
Affects Versions: 0.12
Reporter: Pavel Moravec
Cluster error handling ignores errors on QMF. That leads to leave running a
node affected by an error not seen by other nodes, i.e cluster de-sync.
Particular example: Via QMF, create a huge durable queue on a 2 node cluster,
such that node1 of the cluster does not have sufficient free disk space for the
queue journals, while node2 has enough free disk space. Cluster won't detect
node1 failed to create the queue, leaving a cluster running with 1 node with
the queue and 1 node without the queue.
Reproduction scenario:
1) 2 node cluster running
2) Let leave less than 13M of free disk space on node1 (while enough free space
on node2)
3) On node1, run the attached simple program that will create queue
HugeDurableQueue with qpid.file_count=64 and qpid.file_size=16384.
4) QMF response will be negative (correct), but both nodes will be running with
node1 not having the queue provisioned while node2 having the queue.
5) Repeating the test with sending the QMF command to node2 (with enough free
disk space) will produce _positive_ QMF response - a user is _not_ aware of a
problem on the cluster anyhow.
Both problems (node1 needs to be shutted down + QMF response has to be NACK
everytime) shall be fixed.
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