fe.warn.log日志文件中出现如下错误是什么原因？

2024-07-17 04:55:01,070 WARN (heartbeat mgr|26) [HeartbeatMgr.runAfterCatalogReady():144] get bad heartbeat response: type: BACKEND, status: BAD, msg: java.net.ConnectException: Connection refused (Connection refused), beId: 11034, beHost: 10.102.111.102, bePort: 0, httpPort: 0, brpcPort: 0, arrowFlightSqlPort: 0
2024-07-17 04:55:01,070 WARN (heartbeat mgr|26) [HeartbeatMgr.runAfterCatalogReady():144] get bad heartbeat response: type: BACKEND, status: BAD, msg: java.net.ConnectException: Connection refused (Connection refused), beId: 11035, beHost: 10.102.111.103, bePort: 0, httpPort: 0, brpcPort: 0, arrowFlightSqlPort: 0
2024-07-17 04:55:11,015 WARN (TopicPublisher|51) [TopicPublisherThread.runAfterCatalogReady():86] timed out waiting for all nodes to publish. (pending nodes: [Backend [id=10045, host=10.102.111.101, heartbeatPort=9050, alive=true, lastStartTime=2024-07-17 04:54:45, process epoch=1721163285770, tags: {location=default}]])
2024-07-17 04:55:11,077 WARN (heartbeat-mgr-pool-5|243) [HeartbeatMgr$BackendHeartbeatHandler.call():283] backend heartbeat got exception
org.apache.thrift.transport.TTransportException: java.net.ConnectException: Connection refused (Connection refused)
at org.apache.thrift.transport.TSocket.open(TSocket.java:255) ~[libthrift-0.16.0.jar:0.16.0]
at org.apache.doris.common.GenericPool$ThriftClientFactory.create(GenericPool.java:143) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.common.GenericPool$ThriftClientFactory.create(GenericPool.java:126) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.commons.pool2.BaseKeyedPooledObjectFactory.makeObject(BaseKeyedPooledObjectFactory.java:62) ~[commons-pool2-2.2.jar:2.2]
at org.apache.commons.pool2.impl.GenericKeyedObjectPool.create(GenericKeyedObjectPool.java:1012) ~[commons-pool2-2.2.jar:2.2]
at org.apache.commons.pool2.impl.GenericKeyedObjectPool.borrowObject(GenericKeyedObjectPool.java:356) ~[commons-pool2-2.2.jar:2.2]
at org.apache.commons.pool2.impl.GenericKeyedObjectPool