原因:客户端程序通过zookeeper访问hbase的连接数超过设置的默认链接数(默认数是30),连接数不够用会导致后续的连接连接不上去。
解决办法:设置hbase-site.xml配置文件,添加如下属性
<property> <name>hbase.zookeeper.property.maxClientCnxns</name> <value>300</value> <description>Property from ZooKeeper's config zoo.cfg. Limit on number of concurrent connections (at the socket level) that a single client, identified by IP address, may make to a single member of the ZooKeeper ensemble. Set high to avoid zk connection issues running standalone and pseudo-distributed. </description> </property>
将最大连接数我这设置成了300,后来发现仍然提示同样的问题,最大连接数并没有起作用,根据属性提示,直接修改zoo.cfg配置文件
添加:maxClientCnxns=300
重启下zookeeper,hbase,重新测试,问题解决。
文章转自:http://blog.csdn.net/chlaws/article/details/7101020 |