| 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. |
