004_zookeeper运维之maxClientCnxns overflow

一、

线上默认设置:maxClientCnxns=120   #可通过修改这个值来进行解决

二、

在10.103.110.51这个ip上执行以下命令,进行查看连接情况

[root@10.103.101.94 ~]# netstat -napee | awk '{if ($5 == "10.103.101.93:2181") print $9;}'
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3186006/gunicorn:
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3186089/gunicorn:
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3186002/gunicorn:
[root@10.103.101.94 ~]# netstat -napee | awk '{if ($5 == "10.103.101.93:2181") print $9;}'|wc -c
160
[root@alta1-biz-zoom-1 ~]# echo "stat" | nc 10.103.101.93 2181
Zookeeper version: 3.4.9-1757313, built on 08/23/2016 06:50 GMT
Clients:
 /10.103.110.51:24051[1](queued=0,recved=94,sent=94)
 /10.103.110.51:24149[0](queued=0,recved=1,sent=0)
 /10.103.110.51:24054[1](queued=0,recved=94,sent=94)
 /10.103.110.51:24053[1](queued=0,recved=94,sent=94)
[root@alta1-biz-zoom-1 ~]# echo "cons" | nc 10.103.101.93 2181
 /10.103.102.214:47600[1](queued=0,recved=273,sent=273,sid=0x4262cde3063c0008,lop=GETD,est=1523872662825,to=10000,lcxid=0x10f,lzxid=0x2e0156864d,lresp=1523872663000,llat=0,minlat=0,avglat=0,maxlat=2)
 /127.0.0.1:21533[1](queued=0,recved=2,sent=2,sid=0x4262cde3063c0003,lop=GETC,est=1523872654572,to=30000,lcxid=0x1,lzxid=0x2e015685ea,lresp=1523872658103,llat=50,minlat=0,avglat=48,maxlat=50)
 /10.103.110.51:48686[0](queued=0,recved=1,sent=0)
 /127.0.0.1:21166[1](queued=0,recved=0,sent=0)

参考:https://community.hortonworks.com/articles/51191/understanding-apache-zookeeper-connection-rate-lim.html