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I need to configure Jenkins to send notification on our Slack channel #builds. I configured the Jenkins CI integration in Slack. As a result, I have a token "abcdefgh666", and when I expand the "Setup instructions", I can see our team domain is "mysuperteam". We connect to slack with the url http://mysuperteam.slack.com

I am stuck on step 3. On Slack doc, the screenshot is the following:

slack screen

But in our Jenkins version, the view looks like:

my screen

Obviously, the Test Connection button always return a Failure. In Jenkins logs, I have this many times:

Mar 30, 2017 2:14:38 PM WARNING jenkins.plugins.slack.StandardSlackService publish
Error posting to Slack
java.lang.IllegalStateException: Target host is null
    at org.apache.http.util.Asserts.notNull(Asserts.java:46)
    at org.apache.http.impl.client.InternalHttpClient.determineRoute(InternalHttpClient.java:125)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106)
    at jenkins.plugins.slack.StandardSlackService.publish(StandardSlackService.java:126)
    at jenkins.plugins.slack.SlackNotifier$DescriptorImpl.doTestConnection(SlackNotifier.java:510)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:335)
    at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:175)
    at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:108)
    at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:124)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
    at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:236)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
    at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:236)
    at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
    at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
    at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
    at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669)
    at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:135)
    at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:126)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:80)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
    at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
    at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
    at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
    at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
    at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:553)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:499)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
    at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

I tried using the credentials menu to avoid putting the token directly, I tried to put "slack.com" in "Base URL" field, I tried to check or uncheck the "Is Bot User ?" field, and I tried to put "http://mysuperteam.slack.com" in "Base URL" field.

Is my configuration correct ? What could prevent Jenkins to connect to Slack ?

Antwane
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4 Answers4

11

leave "baseUrl" empty, and save before test via "TestConnection".

Taejun Jang
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  • This should be the accepted answer. Straight to the point and helped to solve my issue after hours of trial and error. – Doug Aug 03 '17 at 11:27
5

Finally, the issue was a temporary bug. Our configuration was valid, and re-testing a few days later seems to work well.

We filled Team Subdomain and Integration Token inputs with information found in our Slack apps management page. In addition, we set the name of the Channel were Jenkins will push notifications:

global config

We didn't set nothing in Slack Webhooks Settings:

webhooks

Important: Remember to save your settings before clicking on "Test Connection" button.

Versions: Jenkins 2.46 / Slack Notification Plugin 2.2. Settings info found on https://github.com/jenkinsci/slack-plugin

Antwane
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    Just wanted to emphasize the importance of saving your settings before testing the connection, especially if you previously had anything in 'Base URL'. This worked perfectly for me. – djangodude Jun 06 '18 at 15:27
1

I had the same issue and found out that I had to create an incoming webhook on the slack interface (https://slack.com/apps/A0F7XDUAZ-incoming-webhooks)
But still I cant get it working...

edit: I may have misinterpreted the installation instruction at https://github.com/jenkinsci/slack-plugin, anyway it's not up to date

Banibal
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0

I am running Jenkins in windows environment as a service. Our Jenkins is behind the firewall and corprate proxy, so i was getting "407 - Proxy Auth Required" Error. Resolved this issue by starting the Jenkins service using my domain ID.

Karthik
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