SpringbootAdmin 配置好了服务器和客户端之后显示客户端离线的问题

Question

服务器配置如下

<dependency>
    <groupId>de.codecentric</groupId>
    <artifactId>spring-boot-admin-starter-server</artifactId>
    <version>1.5.7</version>
</dependency>

<dependency>
    <groupId>de.codecentric</groupId>
    <artifactId>spring-boot-admin-server-ui</artifactId>
    <version>1.5.7</version>
</dependency>

服务器端报错信息

org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [interface java.util.Map] and content type [text/html;charset=UTF-8]
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:110) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:917) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:901) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:655) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:628) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:549) ~[spring-web-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at de.codecentric.boot.admin.web.client.ApplicationOperations.doGet(ApplicationOperations.java:68) ~[spring-boot-admin-server-1.5.7.jar:na]
    at de.codecentric.boot.admin.web.client.ApplicationOperations.getHealth(ApplicationOperations.java:58) ~[spring-boot-admin-server-1.5.7.jar:na]
    at de.codecentric.boot.admin.registry.StatusUpdater.queryStatus(StatusUpdater.java:111) [spring-boot-admin-server-1.5.7.jar:na]
    at de.codecentric.boot.admin.registry.StatusUpdater.updateStatus(StatusUpdater.java:65) [spring-boot-admin-server-1.5.7.jar:na]
    at de.codecentric.boot.admin.registry.StatusUpdateApplicationListener$1.run(StatusUpdateApplicationListener.java:47) [spring-boot-admin-server-1.5.7.jar:na]
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) [spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_181]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_181]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_181]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_181]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_181]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_181]
    at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]