上次搭建HBase环境后，执行登陆服务器时，报下面的错误：Hadoop@gpmaster logs]$ hbase shellSLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/home/hadoop/hbase-1.0.1.1/lib/slf4j-log4j12-1.7.7.jar！/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/home/hadoop/hadoop-2.6.0/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar！/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] 2015-06-13 17:27:40,516 WARN [main] util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable HBase Shell; enter "help<RETURN>" for list of supported commands. Type "exit<RETURN>" to leave the HBase Shell Version 1.0.1.1, re1dbf4df30d214fca14908df71d038081577ea46, Sun May 17 12:34:26 PDT 2015
hbase（main）:001:0> status ERROR: org.apache.hadoop.hbase.PleaseHoldException: Master is initializing at org.apache.hadoop.hbase.master.HMaster.checkInitialized（HMaster.java:1875） at org.apache.hadoop.hbase.master.MasterRpcServices.getClusterStatus（MasterRpcServices.java:691） at org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod（MasterProtos.java:42406） at org.apache.hadoop.hbase.ipc.RpcServer.call（RpcServer.java:2031） at org.apache.hadoop.hbase.ipc.CallRunner.run（CallRunner.java:107） at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop（RpcExecutor.java:130） at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run（RpcExecutor.java:107） at java.lang.Thread.run（Thread.java:745） Here is some help for this command: Show cluster status. Can be "summary", "simple", "detailed", or "replication". The default is "summary". Examples: hbase> status hbase> status "simple" hbase> status "summary" hbase> status "detailed" hbase> status "replication" hbase> status "replication", "source" hbase> status "replication", "sink"
hbase（main）:002:0> 经查看日志/home/hadoop/hbase-1.0.1.1/logs/hbase-hadoop-regionserver-gpmaster.log后，发现关键错误信息： client.HConnectionManager$HConnectionImplementation: Can""t get connection to ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase。 根据信息可以判断zk无法连接。执行jps查看zk都正常。查看hbase-site.xml中zk节点配置正常。根据经验，应该是防火墙没有关闭，2181端口无法访问。 执行service iptables stop关闭防火墙，重启hbase。进入hbase shell，执行list:
hbase（main）:001:0> list TABLE SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/root/hadoop/hbase/lib/slf4j-log4j12-1.6.4.jar！/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/root/hadoop/hadoop-2.2.0/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar！/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. 2014-07-17 14:06:26,013 WARN [main] util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable0 row（s） in 1.0070 seconds=> []
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