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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2018/10/29 00:15:26 UTC
[GitHub] codelipenghui opened a new issue #2876: Limit the client reconnect
behavior.
codelipenghui opened a new issue #2876: Limit the client reconnect behavior.
URL: https://github.com/apache/pulsar/issues/2876
## Actual behavior
I got some un-normal metrics in broker stats.
<img width="554" alt="wechatimg101" src="https://user-images.githubusercontent.com/12592133/47623764-115d6480-db50-11e8-90fa-c7c4f31b45d0.png">
Next, I check the network monitor. At that time, network is almost reach the celling.
<img width="1279" alt="wechatimg111" src="https://user-images.githubusercontent.com/12592133/47623827-b0825c00-db50-11e8-8573-d45290dd2e43.png">
So, I find the error log in pulsar cluster, something looks strange:
Than, i search the client logs in kibana:
<img width="1271" alt="wechatimg143" src="https://user-images.githubusercontent.com/12592133/47623928-88dfc380-db51-11e8-8dd4-5661e6d709fe.png">
<img width="895" alt="wechatimg144" src="https://user-images.githubusercontent.com/12592133/47623929-88dfc380-db51-11e8-9490-a30035dface1.png">
<img width="676" alt="wechatimg145" src="https://user-images.githubusercontent.com/12592133/47623930-88dfc380-db51-11e8-9fc4-54ff1f84f349.png">
Don't care about the client exception, just talk the client reconnect behavior, i think client reconnect to much and load data from bookie make the high network throughput, and for now pulsar client support updateServiceUrl() to user, this method will trigger reconnect behavior.
## conclusion
We should limit the client reconnect behavior to avoid the high load.
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