Could not extract response due to missing HttpMessageConverter

[urswiss]

I have a Spring Boot 1.5.4 application which exposes various actuator endpoints:
endpoints:
hypermedia:
enabled: true
apidocs:
enabled: true
sensitive: false
auditevents:
enabled: false
autoconfig:
enabled: true
sensitive: false
beans:
enabled: true
sensitive: false
configprops:
enabled: true
sensitive: false
docs:
enabled: true
sensitive: false
dump:
enabled: true
sensitive: false
env:
enabled: true
sensitive: false
flyway:
enabled: true
sensitive: false
heapdump:
enabled: true
sensitive: false
health:
enabled: true
sensitive: false
h2-console:
enabled: false
sensitive: false
internal-mail:
enabled: true
sensitive: false
liquibase:
enabled: false
logfile:
enabled: true
sensitive: false
loggers:
enabled: true
sensitive: false
mappings:
enabled: true
sensitive: false
metrics:
enabled: true
sensitive: false
monitoring:
application: ${info.build.name}
server-name: override this
group-for-alerts: java
enabled: true
sensitive: false
pause:
enabled: false
refresh:
enabled: true
sensitive: false
restart:
enabled: true
sensitive: false
resume:
enabled: false
shutdown:
enabled: true
sensitive: false
trace:
enabled: true
sensitive: false

In the application-local.yml I configured Spring Boot Admin as follows
boot:
admin:
url: http://localhost:8081/spring-boot-admin
username: web
password: bla
client:
name: clearview
service-url: http://127.0.0.1:8080/offer-ug/api
management-url: http://127.0.0.1:8080/offer-ug/manage
health-url: http://127.0.0.1:8080/offer-ug/manage/health
prefer-ip: true

The pom.xml has the below additional dependency:
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-client</artifactId>
<version>1.5.1</version>
</dependency>

The application comes up without any errors.

When I now start the Spring Boot Admin Server I get the following exception:
2017-06-21 10:07:59.020 INFO 5068 --- [0.1-8081-exec-1] d.c.b.a.registry.ApplicationRegistry : New Application Application [id=701cde23, name=clearview, managementUrl=http://127.0.0.1:8080/offer-ug/manage, healthUrl=http://127.0.0.1:8080/offer-ug/manage/health, serviceUrl=http://127.0.0.1:8080/offer-ug/api] registered
2017-06-21 10:07:59.084 INFO 5068 --- [ updateTask1] d.c.boot.admin.registry.StatusUpdater : Couldn't retrieve status for Application [id=701cde23, name=clearview, managementUrl=http://127.0.0.1:8080/offer-ug/manage, healthUrl=http://127.0.0.1:8080/offer-ug/manage/health, serviceUrl=http://127.0.0.1:8080/offer-ug/api]

org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [interface java.util.Map] and content type [application/octet-stream]
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:110) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:917) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.web.client.RestTemplate$ResponseEntityResponseExtractor.extractData(RestTemplate.java:901) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:655) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:628) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:549) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at de.codecentric.boot.admin.web.client.ApplicationOperations.doGet(ApplicationOperations.java:74) ~[spring-boot-admin-server-1.5.0.jar:1.5.0]
at de.codecentric.boot.admin.web.client.ApplicationOperations.getHealth(ApplicationOperations.java:64) ~[spring-boot-admin-server-1.5.0.jar:1.5.0]
at de.codecentric.boot.admin.registry.StatusUpdater.queryStatus(StatusUpdater.java:111) [spring-boot-admin-server-1.5.0.jar:1.5.0]
at de.codecentric.boot.admin.registry.StatusUpdater.updateStatus(StatusUpdater.java:65) [spring-boot-admin-server-1.5.0.jar:1.5.0]
at de.codecentric.boot.admin.registry.StatusUpdateApplicationListener$1.run(StatusUpdateApplicationListener.java:47) [spring-boot-admin-server-1.5.0.jar:1.5.0]
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) [spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_121]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_121]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_121]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]

I'm aware that the Response MIME type changed from Spring Boot 1.4 to 1.5 (details).

On the other hand I can see in the code of Spring Boot Admin Server that the accept header is set to APPLICATION_JSON (details, line 65).

Any idea why this exception occurs? Thanks for your help.

[joshiste]

Looks like your client application is responding with the wrong content-type