### Motivation fix issue #2574 . Timeout message not get redeliver in TopicsConsumer when use message listener. This is caused by message listener wrongly set in individual sub-ConsumerImpl.
### Modifications set message listener to null for individual sub-ConsumerImpl. Add a UT ### Result UT passed. [ Full content available at: https://github.com/apache/incubator-pulsar/pull/2583 ] This message was relayed via gitbox.apache.org for [email protected]
