请问，这个异常什么原因会造成扎样的异常出现！

java.util.concurrent.ExecutionException: Ocurrs time out with specfied time 299993 MILLISECONDS
at com.baidu.jprotobuf.pbrpc.client.ProtobufRpcProxy$2.get(ProtobufRpcProxy.java:551) ~[jprotobuf-rpc-core-3.5.21.ja
r:?]
at org.apache.doris.qe.ResultReceiver.getNext(ResultReceiver.java:79) ~[palo-fe.jar:3.4.0]
at org.apache.doris.qe.Coordinator.getNext(Coordinator.java:683) ~[palo-fe.jar:3.4.0]
at org.apache.doris.qe.StmtExecutor.handleQueryStmt(StmtExecutor.java:823) ~[palo-fe.jar:3.4.0]
at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:337) ~[palo-fe.jar:3.4.0]
at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:284) ~[palo-fe.jar:3.4.0]
at org.apache.doris.qe.ConnectProcessor.handleQuery(ConnectProcessor.java:206) ~[palo-fe.jar:3.4.0]
at org.apache.doris.qe.ConnectProcessor.dispatch(ConnectProcessor.java:344) ~[palo-fe.jar:3.4.0]
at org.apache.doris.qe.ConnectProcessor.processOnce(ConnectProcessor.java:545) ~[palo-fe.jar:3.4.0]
at org.apache.doris.mysql.nio.ReadListener.lambda$handleEvent$0(ReadListener.java:50) ~[palo-fe.jar:3.4.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_101]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_101]
Caused by: java.util.concurrent.TimeoutException: Ocurrs time out with specfied time 299993 MILLISECONDS
at com.baidu.jprotobuf.pbrpc.client.ProtobufRpcProxy.doWaitCallback(ProtobufRpcProxy.java:598) ~[jprotobuf-rpc-core-
3.5.21.jar:?]
at com.baidu.jprotobuf.pbrpc.client.ProtobufRpcProxy.access$000(ProtobufRpcProxy.java:51) ~[jprotobuf-rpc-core-3.5.2
1.jar:?]
at com.baidu.jprotobuf.pbrpc.client.ProtobufRpcProxy$2.get(ProtobufRpcProxy.java:549) ~[jprotobuf-rpc-core-3.5.21.ja
r:?]
... 12 more