Dutch T. Meyer created ZOOKEEPER-1855:
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Summary: calls to zoo_set_server() fail to flush outstanding
request queue.
Key: ZOOKEEPER-1855
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1855
Project: ZooKeeper
Issue Type: Bug
Components: c client
Reporter: Dutch T. Meyer
Priority: Minor
If one calls zoo_set_servers to update with a new server list that does not
contain the currently connected server, the client will disconnect. Fair
enough, but any outstanding requests on the set_requests queue aren't
completed, so the next completed request from the new server can fail with an
out-of-order XID error.
The disconnect occurs in update_addrs(), when a reconfig is necessary, though
it's not quite as easy as just calling cleanup_bufs there, because you could
then race the call to dequeue_completion in zookeeper_process and pull NULL
entries for a recently completed request
I don't have a patch for this right now, but I do have a simple repro I can
post when time permits.
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