Nexus Repository Health Check (RHC) unauthorized proxy

"The components in the repository were inspected, but their identity could not be confirmed. This may have happened for the following reasons:

The repository does not contain enough identified components for the results to be meaningful
The components were built from source instead of pulled from the Central Repository
The components were obtained from a repository other than the Central Repository
"

The connection to the Sonatype server is at rhc.sonatype.com port 443, that is IP address 207.223.241.78, which corresponds also to clm.sonatype.com and insight.sonatype.com

Apparently for the PRO version it's rhc-pro.sonatype.com 443 which is 207.223.241.78

Apparently one can have only ONE health check every 24 hours.


Incidentally, if you are using a proxy, and you are not authenticated, you get this error message

org.apache.http.impl.execchain.TunnelRefusedException pxpool-1-thread-4 CONNECT refused by proxy: HTTP/1.1 407 Proxy Authentication Required


with this stacktrace



java.lang.Throwable.(String) 1
java.lang.Exception.(String) 1
org.apache.http.HttpException.(String) 1
org.apache.http.impl.execchain.TunnelRefusedException.(String, HttpResponse) 1
org.apache.http.impl.execchain.MainClientExec.createTunnelToTarget(AuthState, HttpClientConnection, HttpRoute, HttpRequest, HttpClientContext) 1
org.apache.http.impl.execchain.MainClientExec.establishRoute(AuthState, HttpClientConnection, HttpRoute, HttpRequest, HttpClientContext) 1
org.apache.http.impl.execchain.MainClientExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) 1
org.apache.http.impl.execchain.ProtocolExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) 1
org.apache.http.impl.execchain.RetryExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) 1
org.apache.http.impl.execchain.RedirectExec.execute(HttpRoute, HttpRequestWrapper, HttpClientContext, HttpExecutionAware) 1
org.apache.http.impl.client.InternalHttpClient.doExecute(HttpHost, HttpRequest, HttpContext) 1
org.apache.http.impl.client.CloseableHttpClient.execute(HttpUriRequest, HttpContext) 1
org.apache.http.impl.client.CloseableHttpClient.execute(HttpUriRequest) 1
org.apache.http.impl.client.CloseableHttpClient.execute(HttpUriRequest) 1
com.sonatype.nexus.plugins.healthcheck.service.impl.InsightServiceImpl.execute(HttpUriRequest) 1
com.sonatype.nexus.plugins.healthcheck.service.impl.InsightServiceImpl.doGet(String) 1
com.sonatype.nexus.plugins.healthcheck.service.impl.InsightServiceImpl.getNextRunDeltas(String) 1
com.sonatype.nexus.plugins.healthcheck.task.HealthCheckTask.doDeltaCheck(String) 1
com.sonatype.nexus.plugins.healthcheck.task.HealthCheckTask.doRunSafe() 1
com.sonatype.nexus.plugins.healthcheck.task.HealthCheckTask.doRun() 1
org.sonatype.nexus.scheduling.AbstractNexusTask.call() 1
org.sonatype.scheduling.DefaultScheduledTask.call() 1
org.sonatype.nexus.threads.MDCAwareCallable.call() 1
org.apache.shiro.subject.support.SubjectCallable.doCall(Callable) 1
org.apache.shiro.subject.support.SubjectCallable.call() 1
java.util.concurrent.FutureTask.run() 1
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor$ScheduledFutureTask) 1
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run() 1
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor$Worker) 1
java.util.concurrent.ThreadPoolExecutor$Worker.run() 1
java.lang.Thread.run() 1





So https://support.microsoft.com/en-us/help/248020/iis-5-0-error-message-http-1-1-407-proxy-authentication-required you have to talk to the proxy administrator