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From GitBox <...@apache.org>
Subject [GitHub] codelipenghui opened a new issue #2876: Limit the client reconnect behavior.
Date Mon, 29 Oct 2018 00:15:26 GMT
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:
   
   ![wechatimg113](https://user-images.githubusercontent.com/12592133/47623893-4ae29f80-db51-11e8-8a85-346644fbbd34.jpeg)
   
   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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