hbas连接异常

java.io.IOException: Call to dmhadoop005/192.168.28.76:60020 failed on local exception: java.io.IOException: Call 246130 not added as the connection dmhadoop005/192.168.28.76:60020/ClientService/dub (auth:SIMPLE)/10000000 is closing
        at org.apache.hadoop.hbase.ipc.RpcClient.wrapException(RpcClient.java:1489)
        at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1461)
        at org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1661)
        at org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1719)
        at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.scan(ClientProtos.java:30387)
        at org.apache.hadoop.hbase.client.ScannerCallable.close(ScannerCallable.java:291)
        at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:160)
        at org.apache.hadoop.hbase.client.ScannerCallable.call(ScannerCallable.java:59)
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:117)
        at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:93)
        at org.apache.hadoop.hbase.client.ClientScanner.nextScanner(ClientScanner.java:246)
        at org.apache.hadoop.hbase.client.ClientScanner.next(ClientScanner.java:439)
        at org.apache.hadoop.hbase.client.AbstractClientScanner$1.hasNext(AbstractClientScanner.java:91)
        at hbase.HBaseDAOImp.getBatchRowKey(HBaseDAOImp.java:1457)
        at hbase.HBaseDAOImp$BatchRowKeyCallable.call(HBaseDAOImp.java:1487)
        at hbase.HBaseDAOImp$BatchRowKeyCallable.call(HBaseDAOImp.java:1)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Call 246130 not added as the connection dmhadoop005/192.168.28.76:60020/ClientService/dub (auth:SIMPLE)/10000000 is closing
        at org.apache.hadoop.hbase.ipc.RpcClient$Connection.addCall(RpcClient.java:495)
        at org.apache.hadoop.hbase.ipc.RpcClient.getConnection(RpcClient.java:1534)
        at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1442)

        ... 18 more