GitHub user Jaskey opened a pull request:
https://github.com/apache/incubator-rocketmq/pull/95
[ROCKETMQ-184]-It takes too long(3-33 seconds) to switch to read from slave
when master crashes
JIRA:https://issues.apache.org/jira/browse/ROCKETMQ-184?jql=project%20%3D%20ROCKETMQ
Problem, no listener is triggered when Chanel is close.
When async command sent to the server, and the server is crash before
sending response to client, the callback can not be invoked in time. Instead,
the callback can only be triggered by the timeout scan service.
This is obvious for pulling message since the timeout is by default 30
seconds. So if master crashes before process response to the client, the client
can not repull until scan service tell it, which takes at most 30 seconds. And
repull will have 3 seconds delay, so the HA to read from slave has to take 3-33
seconds when this problem occurs.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Jaskey/incubator-rocketmq
ROCKETMQ-184-slave-switch
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-rocketmq/pull/95.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #95
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commit 0dc37e1c10450f143e58faa857f5bf8ccbee1ca3
Author: Jaskey <linjunjie1...@gmail.com>
Date: 2017-04-19T09:13:09Z
invoke callback when channel is close after sending async command
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