测试时启动kylin报错Failed to find metadata store by url: kylin_metadata@hbase和一堆 org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(org.apache.hadoop.hbase.NotServingRegionException): org.apache.hadoop.hbase.NotServingRegionException: hbase:meta,1 is not online on hadoop105,16020,1603268879438
ServingRegionException: org.apache.hadoop.hbase.NotServingRegionException: hbase:meta,,1 is not online on hadoop105,16020,1603269880380 at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegionByEncodedName(HRegionServer.java:3272) at org.apache.hadoop.hbase.regionserver.HRegionServer.getRegion(HRegionServer.java:3249) at org.apache.hadoop.hbase.regionserver.RSRpcServices.getRegion(RSRpcServices.java:1414) at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2429) at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:41998) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)出现bug一定要冷静分析下自己捅下的日志。我的hbase都正常启动。 首先报错Failed to find metadata store by url: kylin_metadata@hbase 可以分析出并不是kylin的原因，而是启动kylin时找不到元数据，kylin的元数据存在hbase中，那就很有可能是我的hbase有问题。 接下来在报出一条Failed to find metadata store by url: kylin_metadata@hbase后报出一堆
org.apache.hadoop.hbase.ipc.RemoteWithExtrasException(org.apache.hadoop.hbase.NotServingRegionException): org.apache.hadoop.hbase.NotServingRegionException: hbase:meta,,1 is not online on hadoop105,16020,1603268879438可能是hbase找不到region的文件，无奈删除了zookeeper下的hbase节点数据，然后重启hbase，再启动kylin正常。具体步骤： 1.切换到zookeeper的bin目录，执行zkCli.sh 2.输入ls / 查看节点 3.执行rmr /hbase 删除hbase的记录（这里会提示你用deleteall，不用管），看节点删除没 4.退出zookeeper 重启hbase，zookeeper，hdfs，yarn。再启动kylin，成功，问题解决。
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