项目使用springBoot2.3.0集成ElasticSearch7.6.2久不久就出现这个报错

Question

项目使用springBoot2.3.0集成ElasticSearch7.6.2久不久就出现这个报错，不知道怎么回事：
2021-04-15 10:53:37.600 ERROR 35036 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataAccessResourceFailureException: 30,000 milliseconds timeout on connection http-outgoing-0 [ACTIVE]; nested exception is java.lang.RuntimeException: 30,000 milliseconds timeout on connection http-outgoing-0 [ACTIVE]] with root cause

java.net.SocketTimeoutException: 30,000 milliseconds timeout on connection http-outgoing-0 [ACTIVE]

at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.timeout(HttpAsyncRequestExecutor.java:387) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:92) ~[httpasyncclient-4.1.4.jar:4.1.4]
at org.apache.http.impl.nio.client.InternalIODispatch.onTimeout(InternalIODispatch.java:39) ~[httpasyncclient-4.1.4.jar:4.1.4]
at org.apache.http.impl.nio.reactor.AbstractIODispatch.timeout(AbstractIODispatch.java:175) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.BaseIOReactor.sessionTimedOut(BaseIOReactor.java:261) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.timeoutCheck(AbstractIOReactor.java:502) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.BaseIOReactor.validate(BaseIOReactor.java:211) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:280) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ~[httpcore-nio-4.4.13.jar:4.4.13]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]

或者是另一个报错：
2021-04-14 22:47:42.956 ERROR 4880 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.DataAccessResourceFailureException: 远程主机强迫关闭了一个现有的连接。; nested exception is java.lang.RuntimeException: 远程主机强迫关闭了一个现有的连接。] with root cause

java.io.IOException: 远程主机强迫关闭了一个现有的连接。

at sun.nio.ch.SocketDispatcher.read0(Native Method) ~[na:1.8.0_181]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43) ~[na:1.8.0_181]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223) ~[na:1.8.0_181]
at sun.nio.ch.IOUtil.read(IOUtil.java:197) ~[na:1.8.0_181]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380) ~[na:1.8.0_181]
at org.apache.http.impl.nio.reactor.SessionInputBufferImpl.fill(SessionInputBufferImpl.java:231) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.codecs.AbstractMessageParser.fillBuffer(AbstractMessageParser.java:136) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:241) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81) ~[httpasyncclient-4.1.4.jar:4.1.4]
at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39) ~[httpasyncclient-4.1.4.jar:4.1.4]
at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) ~[httpcore-nio-4.4.13.jar:4.4.13]
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ~[httpcore-nio-4.4.13.jar:4.4.13]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]

不知道怎么解决