Hbase自动关闭问题

最新推荐文章于 2024-01-27 20:59:30 发布

kokopop007

最新推荐文章于 2024-01-27 20:59:30 发布

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分类专栏： Hbase

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博客内容提及，Hbase在运行过程中遇到无法连接Zookeeper的问题，经检查Zookeeper服务正常，但Zookeeper日志显示'too many connections from host - max is 10'的错误。原因是每个客户端到Zookeeper的最大连接数默认为10。为解决此问题，可以在Zookeeper的zoo.cfg配置文件中将`maxClientCnxns`参数设置为300，然后重启Zookeeper服务，问题得到解决。

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查看日志：

java.lang.RuntimeException: Failed construction of Master: class org.apache.hadoop.hbase.master.HMaster. 
        at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:2462)
        at org.apache.hadoop.hbase.master.HMasterCommandLine.startMaster(HMasterCommandLine.java:231)
        at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:137)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
        at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:127)
        at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2472)
Caused by: org.apache.hadoop.hbase.ZooKeeperConnectionException: master:600000x0, quorum=hadoop01:2181, baseZNode=/hbase Unexpected KeeperException creating base node
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.createBaseZNodes(ZooKeeperWatcher.java:206)
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:187)
        at org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:592)
        at org.apache.hadoop.hbase.master.HMaster.<init>(HMaster.java:392)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
        at org.apache.hadoop.hbase.master.HMaster.constructMaster(HMaster.java:2455)
        ... 5 more
Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
        at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
        at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.createNonSequential(RecoverableZooKeeper.java:575)
        at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.create(RecoverableZooKeeper.java:554)
        at org.apache.hadoop.hbase.zookeeper.ZKUtil.createWithParents(ZKUtil.java:1204)
        at org.apache.hadoop.hbase.zookeeper.ZKUtil.createWithParents(ZKUtil.java:1182)
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.createBaseZNodes(ZooKeeperWatcher.java:194)
        ... 13 more

在这里插入图片描述
如图所示，连不上zookeeper，检查zookeeper服务一切都正常，zookeeper的日志文件时候发现报too many connections from host - max is 10 的错误，hbase连接zookeeper的连接数太多了，在zookeeper的zoo.cfg配置文件中加上如下配置：
maxClientCnxns=300 （zookeeper默认配置给每个哭护短的连接数是10个）
然后重启zookeeper，问题解决。