org.sonar.runner.kevinsawicki.HttpRequest$HttpRequestException - sonarqube

Question

I've installed Sonarqube on my Docker container.
It was working very well up to a point, and I able to access it from the Web UI.
I'm a running it like this:
sonar.sh start
sonar-runner -e
However, out of the blue I am getting
SonarQube Runner 2.4
Java 1.8.0_111 Oracle Corporation (64-bit)
Linux 4.4.27-moby amd64
INFO: Error stacktraces are turned on.
INFO: Runner configuration file: /root/sonar-runner-2.4/conf/sonar-runner.properties
INFO: Project configuration file: NONE
INFO: Default locale: "en", source code encoding: "UTF-8" (analysis is platform dependent)
INFO: Work directory: /root/sonarqube-6.2/bin/linux-x86-64/./.sonar
ERROR: Sonar server 'http://localhost:9000' can not be reached
INFO: ------------------------------------------------------------------------
INFO: EXECUTION FAILURE
INFO: ------------------------------------------------------------------------
Total time: 0.104s
Final Memory: 1M/31M
INFO: ------------------------------------------------------------------------
ERROR: Error during Sonar runner execution
org.sonar.runner.kevinsawicki.HttpRequest$HttpRequestException: java.net.ConnectException: Connection refused (Connection refused)
at org.sonar.runner.kevinsawicki.HttpRequest.code(HttpRequest.java:1392)
at org.sonar.runner.kevinsawicki.HttpRequest.ok(HttpRequest.java:1417)
at org.sonar.runner.impl.ServerConnection.downloadString(ServerConnection.java:93)
at org.sonar.runner.impl.ServerVersion.downloadVersion(ServerVersion.java:47)
at org.sonar.runner.impl.ServerVersion.version(ServerVersion.java:38)
at org.sonar.runner.impl.ServerVersion.is37Compatible(ServerVersion.java:58)
at org.sonar.runner.impl.JarDownloader.checkVersionAndDownload(JarDownloader.java:36)
at org.sonar.runner.impl.BatchLauncher$1.run(BatchLauncher.java:71)
at java.security.AccessController.doPrivileged(Native Method)
at org.sonar.runner.impl.BatchLauncher.doExecute(BatchLauncher.java:69)
at org.sonar.runner.impl.BatchLauncher.execute(BatchLauncher.java:50)
at org.sonar.runner.api.EmbeddedRunner.doExecute(EmbeddedRunner.java:102)
at org.sonar.runner.api.Runner.execute(Runner.java:100)
at org.sonar.runner.Main.executeTask(Main.java:70)
at org.sonar.runner.Main.execute(Main.java:59)
at org.sonar.runner.Main.main(Main.java:53)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1926)
at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1921)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1920)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1490)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at org.sonar.runner.kevinsawicki.HttpRequest.code(HttpRequest.java:1390)
... 15 more
Sonarqube logs have the following 4 errors:
ce.log:2017.01.31 13:22:29 ERROR ce[][o.s.s.c.t.CeWorkerCallableImpl] Failed to pop the queue of analysis reports
sonar.log:2017.01.31 18:13:00 ERROR app[][o.s.p.m.Monitor] Process[web] failed to start
web.2017-01-30.log:2017.01.30 18:25:59 ERROR web[AVnwoF863qSCVt7PAAAA][o.s.s.ui.JRubyFacade] Fail to render: http://localhost:9000/
web.log:2017.01.31 18:13:00 ERROR web[][o.a.c.c.StandardContext] Context [] startup failed due to previous errors
I am really surprised by this, since I haven't changed anything. I only added a jar to /extensions/plugins/ and then I deleted it.
What's the cause of this error?

Answer 1

As reflected by your server log excerpts, the connection to your SonarQube server is refused because it is not online. Why? Because
failed to start
and
startup failed due to previous errors
Get your server up and running. Then you'll be able to perform analysis.