too many NOTIFY_CONSUMER_IDS_CHANGED block pullThread will cause request timeout

[ifplusor]

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BUG REPORT

1. Please describe the issue you observed:

• What did you do (The steps to reproduce)?

when many client start in same time, too many NOTIFY_CONSUMER_IDS_CHANGED cause so many rebalance, they block pullThread and all request will timeout.

• What did you expect to see?

response come, and request return.

• What did you see instead?

2. Please tell us about your environment:

• What is your OS?

• What is your client version?

• What is your RocketMQ version?

3. Other information (e.g. detailed explanation, logs, related issues, suggestions on how to fix, etc):

FEATURE REQUEST

1. Please describe the feature you are requesting.

2. Provide any additional detail on your proposed use case for this feature.

3. Indicate the importance of this issue to you (blocker, must-have, should-have, nice-to-have). Are you currently using any workarounds to address this issue?

4. If there are some sub-tasks using -[] for each subtask and create a corresponding issue to map to the sub task:

• sub-task1-issue-number: sub-task1 description here,
• sub-task2-issue-number: sub-task2 description here,
• ...

[ShannonDing]

close due to #156