Java连接Hbase异常

Exception in thread "main" org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after attempts=36, exceptions:
Wed Mar 27 22:11:07 CST 2019, null, java.net.SocketTimeoutException: callTimeout=60000, callDuration=76606: Connection refused: no further information row 'userinfo,,' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=hd102,16020,1553671979431, seqNum=0

at org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas.throwEnrichedException(RpcRetryingCallerWithReadReplicas.java:276)
at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:210)
at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas.call(ScannerCallableWithReplicas.java:60)
at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:212)
at org.apache.hadoop.hbase.client.ClientScanner.call(ClientScanner.java:327)
at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:302)
at org.apache.hadoop.hbase.client.ClientScanner.initializeScannerInConstruction(ClientScanner.java:167)
at org.apache.hadoop.hbase.client.ClientScanner.<init>(ClientScanner.java:162)
at org.apache.hadoop.hbase.client.HTable.getScanner(HTable.java:796)
at org.apache.hadoop.hbase.MetaTableAccessor.fullScan(MetaTableAccessor.java:602)
at org.apache.hadoop.hbase.MetaTableAccessor.tableExists(MetaTableAccessor.java:366)
at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:408)
at com.zh.hbase.HbaseTest.isExist(HbaseTest.java:36)
at com.zh.hbase.HbaseTest.main(HbaseTest.java:155)
Caused by: java.net.SocketTimeoutException: callTimeout=60000, callDuration=76606: Connection refused: no further information row 'userinfo,,' on table 'hbase:meta' at region=hbase:meta,,1.1588230740, hostname=hd102,16020,1553671979431, seqNum=0
at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:171)
at org.apache.hadoop.hbase.client.ResultBoundedCompletionService$QueueingFuture.run(ResultBoundedCompletionService.java:65)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.ConnectException: Connection refused: no further information
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
at org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.setupConnection(RpcClientImpl.java:416)
at org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.setupIOstreams(RpcClientImpl.java:722)
at org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.writeRequest(RpcClientImpl.java:909)
at org.apache.hadoop.hbase.ipc.RpcClientImpl$Connection.tracedWriteRequest(RpcClientImpl.java:873)
at org.apache.hadoop.hbase.ipc.RpcClientImpl.call(RpcClientImpl.java:1244)
at org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:227)
at org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:336)
at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.scan(ClientProtos.java:35396)
at org.apache.hadoop.hbase.client.ScannerCallable.openScanner(ScannerCallable.java:404)
at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:211)
at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:65)
at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:212)
at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:364)
at org.apache.hadoop.hbase.client.ScannerCallableWithReplicas$RetryingRPC.call(ScannerCallableWithReplicas.java:338)
at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:137)
... 4 more
Disconnected from the target VM, address: '127.0.0.1:55381', transport: 'socket'

Process finished with exit code 1

　　今天学习Hbase，用idea编写Java程序连接Hbase，报以上的错误。

　　我仔细核对了Hbase的配置文件，并且确认了hosts文件的映射关系都是没有问题的。经过仔细阅读日志后，发现连接失败的是hd102这台服务器，登录服务器后发现hd102这台从服务器没有启动Hbase，启动后，再次尝试Java程序连接成功。