Gary Tully created AMQ-4540:
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Summary: NetworkBridge - don't wait for ever for
demandSubscription pending send responses on remove
Key: AMQ-4540
URL: https://issues.apache.org/jira/browse/AMQ-4540
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.8.0
Reporter: Gary Tully
Fix For: 5.9.0
In a networkbridge, a demandSub tracks outstanding asyncRquests and waits for
them to complete on removal such that the messages can be acked correctly when
the send completes.
If the send is blocked on pfc on the remote broker, it may not return for some
time, which blocks other removals leaving messages stuck inflight to networked
subscriptions.
The wait ensures that a message send will not be a duplicate, but blocking for
ever does not make sense, especially considering that removes are serialised.
We need some openwire command that can cancel pending sends to sort out this
case but even then we need to timeout at some stage in case the other end
cannot respond.
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