1、執行命令list_namespace報錯：
hbase(main):006:0> list_namespace
NAMESPACE
ERROR: org.apache.hadoop.hbase.PleaseHoldException: Master is initializing
at org.apache.hadoop.hbase.master.HMaster.checkInitialized(HMaster.java:2975)
at org.apache.hadoop.hbase.master.HMaster.getNamespaces(HMaster.java:3271)
at org.apache.hadoop.hbase.master.MasterRpcServices.listNamespaceDescriptors(MasterRpcServices.java:1237)
at org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:132)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)
2、檢查下面的日誌文件，報如下錯誤
2019-10-08 01:16:33,742 ERROR [RS_OPEN_META-regionserver/gfs01:16020-0] handler.OpenRegionHandler: Failed open of region=hbase:meta,,1.1588230740
java.lang.NoClassDefFoundError: Could not initialize class org.apache.hadoop.hbase.io.asyncfs.FanOutOneBlockAsyncDFSOutputHelper
at org.apache.hadoop.hbase.io.asyncfs.AsyncFSOutputHelper.createOutput(AsyncFSOutputHelper.java:51)
at org.apache.hadoop.hbase.regionserver.wal.AsyncProtobufLogWriter.initOutput(AsyncProtobufLogWriter.java:169)
at org.apache.hadoop.hbase.regionserver.wal.AbstractProtobufLogWriter.init(AbstractProtobufLogWriter.java:166)
at org.apache.hadoop.hbase.wal.AsyncFSWALProvider.createAsyncWriter(AsyncFSWALProvider.java:113)
at org.apache.hadoop.hbase.regionserver.wal.AsyncFSWAL.createWriterInstance(AsyncFSWAL.java:615)
at org.apache.hadoop.hbase.regionserver.wal.AsyncFSWAL.createWriterInstance(AsyncFSWAL.java:126)
at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.rollWriter(AbstractFSWAL.java:763)
at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.rollWriter(AbstractFSWAL.java:497)
at org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL.init(AbstractFSWAL.java:438)
at org.apache.hadoop.hbase.wal.AbstractFSWALProvider.getWAL(AbstractFSWALProvider.java:156)
at org.apache.hadoop.hbase.wal.AbstractFSWALProvider.getWAL(AbstractFSWALProvider.java:61)
at org.apache.hadoop.hbase.wal.WALFactory.getWAL(WALFactory.java:284)
at org.apache.hadoop.hbase.regionserver.HRegionServer.getWAL(HRegionServer.java:2136)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.openRegion(OpenRegionHandler.java:284)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler.process(OpenRegionHandler.java:107)
at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:104)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
3、解決：
vi /usr/hbase-2.1.6/conf/hbase-site.xml
添加：
<property>
<name>hbase.wal.provider</name>
<value>filesystem</value>
</property>
4、重啓hbase
stop-hbase.sh
start-hbase.sh
5、驗證
hbase(main):001:0> list
TABLE
0 row(s)
Took 0.9442 seconds
=> []
hbase(main):002:0> list_namespace
NAMESPACE
default
hbase
2 row(s)
Took 0.0902 seconds
hbase(main):003:0>