Hbase Region Server中的例外情况

Question

我不断看到这些日志打印在hbase区域服务器日志中.10.0.5.133是存在hbase java客户端的机器.

它一直在断开和连接.出现这种情况的原因是什么？客户端库/服务器版本是否存在不匹配？还有其他原因吗？我试图谷歌这个,但找不到任何有用的链接.

2015-12-25 20:24:03,210 DEBUG [RpcServer.reader=9,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:54538 because read count=-1. Number of active connections: 30
2015-12-25 20:24:03,213 DEBUG [RpcServer.reader=2,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:54564 because read count=-1. Number of active connections: 29
2015-12-25 20:24:08,350 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:54642; # active connections: 26
2015-12-25 20:24:18,358 DEBUG [RpcServer.reader=8,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:54642 because read count=-1. Number of active connections: 29
2015-12-25 20:24:30,543 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:54799; # active connections: 28
2015-12-25 20:24:40,547 DEBUG [RpcServer.reader=0,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:54799 because read count=-1. Number of active connections: 29
2015-12-25 20:24:41,870 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:54864; # active connections: 29
2015-12-25 20:24:51,877 DEBUG [RpcServer.reader=8,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:54864 because read count=-1. Number of active connections: 28
2015-12-25 20:25:00,634 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:54982; # active connections: 27
2015-12-25 20:25:10,645 DEBUG [RpcServer.reader=6,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:54982 because read count=-1. Number of active connections: 30
2015-12-25 20:26:30,169 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:55511; # active connections: 26
2015-12-25 20:26:40,176 DEBUG [RpcServer.reader=3,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:55511 because read count=-1. Number of active connections: 32
2015-12-25 20:26:41,117 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:55594; # active connections: 30
2015-12-25 20:26:44,607 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:55623; # active connections: 31
2015-12-25 20:26:51,129 DEBUG [RpcServer.reader=7,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:55594 because read count=-1. Number of active connections: 26
2015-12-25 20:26:54,614 DEBUG [RpcServer.reader=2,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:55623 because read count=-1. Number of active connections: 23
2015-12-25 20:27:01,926 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:55731; # active connections: 31
2015-12-25 20:27:11,938 DEBUG [RpcServer.reader=5,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:55731 because read count=-1. Number of active connections: 29
2015-12-25 20:27:14,711 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:55776; # active connections: 28
2015-12-25 20:27:24,719 DEBUG [RpcServer.reader=3,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:55776 because read count=-1. Number of active connections: 28
2015-12-25 20:27:36,791 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:55938; # active connections: 24
2015-12-25 20:27:45,008 DEBUG [RpcServer.listener,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: connection from 10.0.5.133:56013; # active connections: 27
2015-12-25 20:27:46,799 DEBUG [RpcServer.reader=4,port=60020] ipc.RpcServer: RpcServer.listener,port=60020: DISCONNECTING client 10.0.5.133:55938 because read count=-1. Number of active connections: 29

Answer 1

看起来客户端连接负载远远超过默认的最大客户端连接限制 30。您可能需要考虑提高该配置。

以下是更多信息：http://archive.cloudera.com/cdh/3/hbase-0.90.1-cdh3u0/configuration.html

hbase.zookeeper.property.maxClientCnxns

来自 ZooKeeper 的配置zoo.cfg 的属性。限制单个客户端（由 IP 地址标识）可以与 ZooKeeper 整体的单个成员建立的并发连接数（在套接字级别）。设置高以避免独立运行和伪分布式运行时出现 zk 连接问题。

默认值：30