It seems like we have a different problem every day. I was opening up the CI (TeamCity) site to public access so I did a bit of changes in Build agent configuration and TeamCity server configuration. After that, I am not able to connect the build agent from Teamcity server.

Are you also having the same problem?

If yes then the first thing that you should check is the teamcity-agent.log file which is located under C:\BuildAgent\logs folder.

[2013-10-29 14:29:41,264] INFO – buildServer.AGENT.registration – Registering on server http:://localhost:5534, AgentDetails{Name=‘my-agent-name’, AgentId=null, BuildId=null, AgentOwnAddress=‘null’, AlternativeAddresses=[100.90.98.83], Port=9090, Version=‘27540′, PluginsVersion=‘27540-md5-5b7544cdf3432ba89ca2a172e2a1e21f’, AvailableRunners=[Ant, dotnet-tools-dupfinder, dotnet-tools-inspectcode, Duplicator, FxCop, gradle-runner, Inspection, Ipr, jb.nuget.installer, jb.nuget.pack, jb.nuget.publish, jetbrains.dotNetGenericRunner, jetbrains.mspec, jetbrains_powershell, JPS, Maven2, MSBuild, MSTest, NAnt, NUnit, rake-runner, simpleRunner, sln2003, VS.Solution], AvailableVcs=[perforce, mercurial, jetbrains.git, tfs, svn, cvs], AuthorizationToken=‘c’}

[2013-10-29 14:29:41,312] WARN – buildServer.AGENT.registration – Call http:://localhost:5534/RPC2 buildServer.registerAgent3: org.apache.xmlrpc.XmlRpcClientException: Unexpected exception in client processing

[2013-10-29 14:29:41,313] WARN – buildServer.AGENT.registration – Connection to TeamCity server is probably lost. Will be trying to restore it. Take a look at logs/teamcity-agent.log for details (unless you’re using custom logging).

Do you see the error? Yes. There is two colons (http::localhost) in URL. You can open up the buildAgent.properties file under C:\BuildAgent\conf.

Here is the most typical buildAgent.properties file look like. After that, you can restart the “Team City Build Agent” service.

#Generated properties (see buildAgent.dist.properties for description) #Tue Oct 29 14:17:24 UTC 2013 name=my-agent-name ownPort=9090 serverUrl=http://localhost:5534 workDir=C:\BuildAgent\work tempDir=C:\BuildAgent\temp #User defined properties #Tue Oct 29 14:17:24 UTC 2013 authorizationToken=c05cf77775ac4fb52321b3f23f66e882 env.TEAMCITY_JRE=C:\BuildAgent\jre