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  1. Jenkins
  2. JENKINS-50219

Jenkins agent windows service fails to restart with an unhandled COMException in WinSw's log

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Minor Minor
    • windows-slave-installer-module
    • None
    • Jenkins 2.9.84
      windows-slave-installer 1.9.2
      jenkins-slave.exe running on Windows 10 + jre 1.8.0.161 under local admin credentials.

      We have noticed that our Windows 10 nodes have been intermittently failing to come back online after Jenkins / master restarts.

       

      The following entries are shown in WinSw's Jenkins-slave.wrapper.log file at the time of the failures. In particular it appears that the unhandled COMException is preventing the service restarting successfully.

       

      2018-03-16 12:26:38,011 DEBUG - Starting ServiceWrapper in the CLI mode
2018-03-16 12:26:38,589 INFO  - Restarting the service with id 'jenkinsslave-c__jenkins'
2018-03-16 12:26:38,682 DEBUG - Completed. Exit code is 0
2018-03-16 12:26:38,870 DEBUG - Starting ServiceWrapper in the CLI mode
2018-03-16 12:26:39,151 INFO  - Restarting the service with id 'jenkinsslave-c__jenkins'
2018-03-16 12:26:39,276 INFO  - Stopping jenkinsslave-c__jenkins
2018-03-16 12:26:39,292 DEBUG - ProcessKill 332
2018-03-16 12:26:39,386 INFO  - Found child process: 420 Name: conhost.exe
2018-03-16 12:26:39,433 INFO  - Stopping process 420
2018-03-16 12:26:39,448 INFO  - Send SIGINT 420
2018-03-16 12:26:39,464 WARN  - SIGINT to 420 failed - Killing as fallback
2018-03-16 12:26:39,464 INFO  - Stopping process 332
2018-03-16 12:26:39,479 INFO  - Send SIGINT 332
2018-03-16 12:26:39,495 WARN  - SIGINT to 332 failed - Killing as fallback
2018-03-16 12:26:39,511 INFO  - Finished jenkinsslave-c__jenkins
2018-03-16 12:26:39,511 DEBUG - Completed. Exit code is 0
2018-03-16 12:26:40,342 FATAL - Unhandled exception
System.Runtime.InteropServices.COMException (0x80040150): Could not read key from registry (Exception from HRESULT: 0x80040150 (REGDB_E_READREGDB))
   at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   at System.Management.ManagementObjectSearcher.Get()
   at WMI.WmiRoot.ClassHandler.Invoke(Object proxy, MethodInfo method, Object[] args)
   at winsw.WrapperService.Run(String[] _args, ServiceDescriptor descriptor)
   at winsw.WrapperService.Main(String[] args)

      After some inspection of WinSw's source code we have determined that the exception is being thrown from the line "s = svc.Select(d.Id);" in the following snippet (found in the "Run" method in "src/Core/ServiceWrapper/Main.cs lines 687-704). When a secondary WinSw process is run with the "restart!" parameter by Jenkins.

       

      if (args[0] == "restart")
{
    Log.Info("Restarting the service with id '" + d.Id + "'");
    if (s == null) 
        ThrowNoSuchService();
    if(s.Started)
        s.StopService();
    while (s.Started)
    {
        Thread.Sleep(1000);
        s = svc.Select(d.Id);
    }
    s.StartService();
    return;
}

      We are currently able to work around the problem by restarting the service manually on affected nodes.

       

       

            oleg_nenashev Oleg Nenashev
            tom_m_third_dimension Tom Manning
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              Created:
              Updated: