我们正在使用kafka高级使用者，我们能够成功地使用消息，但是zookeeper连接不断过期并重新建立。
我想知道为什么没有心跳来维持连接：
Kafka Consumer Logs
====================
[localhost-startStop-1-SendThread(10.41.105.23:2181)] [ClientCnxn$SendThread] [line : 1096 ] - Client session timed out, have not heard from server in 2666ms for sessionid 0x153175bd3860159, closing socket connection and attempting reconnect
2016-03-08 18:00:06,750 INFO [localhost-startStop-1-SendThread(10.41.105.23:2181)] [ClientCnxn$SendThread] [line : 975 ] - Opening socket connection to server 10.41.105.23/10.41.105.23:2181. Will not attempt to authenticate using SASL (unknown error)
2016-03-08 18:00:06,823 INFO [localhost-startStop-1-SendThread(10.41.105.23:2181)] [ClientCnxn$SendThread] [line : 852 ] - Socket connection established to 10.41.105.23/10.41.105.23:2181, initiating session
2016-03-08 18:00:06,892 INFO [localhost-startStop-1-SendThread(10.41.105.23:2181)] [ClientCnxn$SendThread] [line : 1235 ] - Session establishment complete on server 10.41.105.23/10.41.105.23:2181, sessionid = 0x153175bd3860159, negotiated timeout = 4000
Zookeeper Logs
==================
[2016-03-08 17:44:37,722] INFO Accepted socket connection from /10.10.113.92:51333 (org.apache.zookeeper.server.NIOServerCnxnFactory)
[2016-03-08 17:44:37,742] INFO Client attempting to renew session 0x153175bd3860159 at /10.10.113.92:51333 (org.apache.zookeeper.server.ZooKeeperServer)
[2016-03-08 17:44:37,742] INFO Established session 0x153175bd3860159 with negotiated timeout 4000 for client /10.10.113.92:51333 (org.apache.zookeeper.server.ZooKeeperServer)
[2016-03-08 17:46:56,000] INFO Expiring session 0x153175bd3860151, timeout of 4000ms exceeded (org.apache.zookeeper.server.ZooKeeperServer)
[2016-03-08 17:46:56,001] INFO Processed session termination for sessionid: 0x153175bd3860151 (org.apache.zookeeper.server.PrepRequestProcessor)
[2016-03-08 17:46:56,011] INFO Closed socket connection for client /10.10.114.183:38324 which had sessionid 0x153175bd3860151 (org.apache.zookeeper.server.NIOServerCnxn)
2条答案
按热度按时间c0vxltue1#
[2016-03-08 17:46:56000]信息过期会话0x153175bd3860151，超时超过4000ms（org.apache.zookeeper.server.zookeeperserver）
什么是Zookeeper的
maxSessionTimeout? 如果它只有4000ms（4秒），那么它就太小了。在hadoop的cloudera发行版中，zk
maxSessionTimeout默认为40秒（40000毫秒）。如zk配置中所述-https://zookeeper.apache.org/doc/r3.4.5/zookeeperadmin.html 默认值为20
ticks（还有一个）tick默认值为2秒）。7d7tgy0s2#
zookeeper会话超时通常是由“软故障”引起的，这通常是垃圾收集暂停。打开gc日志记录，查看连接超时时是否发生长gc。另外，请阅读kafka中的jvm调优。