QPID-4428: HA add UUID tag to avoid using an out of date queue/exchange.

Imagine a cluster with primary A and backups B and C. A queue Q is created on A
and replicated to B, C. Now A dies and B takes over as primary. Before C can
connect to B, a client destroys Q and creates a new queue with the same name.
When B connects it sees Q and incorrectly assumes it is the same Q that it has
already replicated. Now C has an inconsistent replica of Q.

The fix is to tag queues/exchanges with a UUID so a backup can tell if a queue
is not the same as the one it has already replicated, even if the names are the
same.  This all also applies to exchanges.

- Minor imrovements to printing UUIDs in a FieldTable.
- Fix comparison of void Variants, added operator !=

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@1409241 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 0 insertions, 11 deletions

diff --git a/cpp/src/qpid/broker/SessionAdapter.cpp b/cpp/src/qpid/broker/SessionAdapter.cpp
index 0cf55d06e6..0263ff2a58 100644
--- a/cpp/src/qpid/broker/SessionAdapter.cpp
+++ b/cpp/src/qpid/broker/SessionAdapter.cpp
@@ -98,17 +98,6 @@ void SessionAdapter::ExchangeHandlerImpl::declare(const string& exchange, const
                 //exchange already there, not created
                 checkType(response.first, type);
                 checkAlternate(response.first, alternate);
-                ManagementAgent* agent = getBroker().getManagementAgent();
-                if (agent)
-                    agent->raiseEvent(_qmf::EventExchangeDeclare(getConnection().getUrl(),
-                                                                 getConnection().getUserId(),
-                                                                 exchange,
-                                                                 type,
-                                                                 alternateExchange,
-                                                                 durable,
-                                                                 false,
-                                                                 ManagementAgent::toMap(args),
-                                                                 "existing"));
                 QPID_LOG_CAT(debug, model, "Create exchange. name:" << exchange
                     << " user:" << getConnection().getUserId()
                     << " rhost:" << getConnection().getUrl()