I've posted my question on StackOverFlow before:https://stackoverflow.com/questions/47214725/xcode-integration-bot-hangs-on-processing-warnings
But no reponse yet.
So I checked my Xcode server build log carefully, and finally found something.
Here is part of the log in 'buildService.log'
```
Mar 1 14:15:10 [751] <Info>: Integration commit history are needed but not loaded yet, fetching.
Mar 1 14:15:10 [751] <Info>: Integration commits loaded successfully.
Mar 1 14:15:11 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=com.apple.dt.SourceControlErrorDomain Code=-1 "Access to '/svnrepos/Vendors/SVG/TrafoParser.m' forbidden (1)" UserInfo={com.apple.dt.sourcecontrol.UnderlyingErrorString=Authentication realm: <https://placeholder:443> subversion
Password for 'john': svn: E170013: Unable to connect to a repository at URL 'https://john@placeholder/TrafoParser.m//john@placeholdersvnrepos/Vendors/SVG/TrafoParser.m'
svn: E175013: Access to '/svnrepos/Vendors/SVG/TrafoParser.m' forbidden
(1), NSLocalizedDescription=Access to '/svnrepos/Vendors/SVG/TrafoParser.m' forbidden (1)}
Mar 1 14:15:12 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=com.apple.dt.SourceControlErrorDomain Code=-1 "Access to '/svnrepos/Vendors/SVG/TrafoParser.m' forbidden (1)" UserInfo={com.apple.dt.sourcecontrol.UnderlyingErrorString=Authentication realm: <https://placeholder:443> subversion
Password for 'john': svn: E170013: Unable to connect to a repository at URL 'https://john@placeholder/TrafoParser.m//john@placeholder.com/svnrepos/Vendors/SVG/TrafoParser.m'
svn: E175013: Access to '/svnrepos/Vendors/SVG/TrafoParser.m' forbidden
(1), NSLocalizedDescription=Access to '/svnrepos/Vendors/SVG/TrafoParser.m' forbidden (1)}
another part :
Mar 1 14:15:13 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=com.apple.dt.SourceControlErrorDomain Code=-1 "Access to '/svnrepos/Vendors/SVG/TrafoParser.m' forbidden (1)" UserInfo={com.apple.dt.sourcecontrol.UnderlyingErrorString=Authentication realm: <https://placeholder:443> subversion
Mar 1 14:15:55 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." UserInfo={NSLocalizedDescription=Couldn’t communicate with a helper application., NSLocalizedRecoverySuggestion=Try your operation again. If that fails, quit and relaunch the application and try again.}
Mar 1 14:15:56 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." UserInfo={NSLocalizedDescription=Couldn’t communicate with a helper application., NSLocalizedRecoverySuggestion=Try your operation again. If that fails, quit and relaunch the application and try again.}
Mar 1 14:15:58 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." UserInfo={NSLocalizedDescription=Couldn’t communicate with a helper application., NSLocalizedRecoverySuggestion=Try your operation again. If that fails, quit and relaunch the application and try again.}
Mar 1 14:16:00 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." UserInfo={NSLocalizedDescription=Couldn’t communicate with a helper application., NSLocalizedRecoverySuggestion=Try your operation again. If that fails, quit and relaunch the application and try again.}
Mar 1 14:16:01 [751] <Error>: Could not fetch some items from the source control cache: Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." UserInfo={NSLocalizedDescription=Couldn’t communicate with a helper application., NSLocalizedRecoverySuggestion=Try your operation again. If that fails, quit and relaunch the application and try again.}
```
It has more than 1000 such messages above.
So my quesion is what does ‘NSCocoaErrorDomain Code=4097’ mean? and What could I do to prevent Xcode server keep doing this ?
