hbase运行时ERROR:org.apache.hadoop.hbase.PleaseHoldException:Master is initializing的解决方法
ERROR: org.apache.hadoop.hbase.PleaseHoldException: Master is initializing
at org.apache.hadoop.hbase.master.HMaster.checkInitialized(HMaster.java:1869)
at org.apache.hadoop.hbase.master.MasterRpcServices.getTableDescriptors(MasterRpcServices.java:775)
at org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java:42402)
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:744)
Here is some help for this command:
List all tables in hbase. Optional regular expression parameter could
be used to filter the output. Examples:
hbase> list
hbase> list 'abc.*'
hbase> list 'ns:abc.*'
hbase> list 'ns:.*'
出现这种问题的原因是因为多台节点的时间不同步,导致节点之间的连接时间超时,这时只需要通过 ntpdate 0.cn.pool.ntp.org 命令使各个节点的时间跟网络时间同步即可。
在完成上部操作之后,重启hbase服务时又会报错:
ERROR: Can't get master address from ZooKeeper; znode data == null
Here is some help for this command:
List all tables in hbase. Optional regular expression parameter could
be used to filter the output. Examples:
hbase> list
hbase> list 'abc.*'
hbase> list 'ns:abc.*'
hbase> list 'ns:.*'
这时,出现的问题是由于节点多次或长期挂起导致的zookeeper不稳定,我们可以通过多次重启hbase服务或者是格式化namenode和DataNode,解决问题。