hbase错误 ZooKeeperConnectionException

用hbase的rest服务给业务方提供web访问接口，

经常会遇到服务不可用的情况，查看日志，发现以下错误：

 

2012-11-08 06:10:37,447 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server hd0149-sw36.dc.sh-wgq.sdo.com/10.133.10.191:
2181
2012-11-08 06:10:37,447 WARN org.mortbay.log: /fh_spread_mes/ZTVzZmJ1cHNiYW90dWk=/: org.apache.hadoop.hbase.ZooKeeperConnectionException: HBas
e is able to connect to ZooKeeper but the connection closes immediately. This could be a sign that the server has too many connections (30 is
the default). Consider inspecting your ZK server logs for that error and then make sure you are reusing HBaseConfiguration as often as you can
. See HTable's javadoc for more information.
2012-11-08 06:10:37,448 INFO org.apache.zookeeper.ClientCnxn: EventThread shut down
2012-11-08 06:10:37,454 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to hd0149-sw36.dc.sh-wgq.sdo.com/10.133.10.191:218
1, initiating session
2012-11-08 06:10:37,454 INFO org.apache.zookeeper.ClientCnxn: Unable to read additional data from server sessionid 0x0, likely server has clos
ed socket, closing socket connection and attempting reconnect
2012-11-08 06:10:37,961 INFO org.apache.zookeeper.ClientCnxn: Opening socket connection to server hd0003-sw1.dc.sh-wgq.sdo.com/10.133.10.14:21
81
2012-11-08 06:10:37,962 INFO org.apache.zookeeper.ClientCnxn: Socket connection established to hd0003-sw1.dc.sh-wgq.sdo.com/10.133.10.14:2181,
 initiating session
2012-11-08 06:10:37,964 WARN org.apache.zookeeper.ClientCnxn: Session 0x0 for server hd0003-sw1.dc.sh-wgq.sdo.com/10.133.10.14:2181, unexpecte
d error, closing socket connection and attempting reconnect
java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcher.read0(Native Method)
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21)
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:202)
        at sun.nio.ch.IOUtil.read(IOUtil.java:169)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:243)
        at org.apache.zookeeper.ClientCnxn$SendThread.doIO(ClientCnxn.java:858)
        at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1130)

 

说是hbase连接数过多，默认30，

 org.apache.hadoop.hbase.ZooKeeperConnectionException: HBas
e is able to connect to ZooKeeper but the connection closes immediately. This could be a sign that the server has too many connections (30 is
the default). 

 

在网上找了下解决方法：

 

修改hbase master的/etc/security/limits.conf

在最后加上：

 

hdfs  -       nofile  32768

hbase  -       nofile  32768

然后重启下hbase master。

看看是否有用。。