Ross Lamont created NETBEANS-659:
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             Summary: Exception on startup
                 Key: NETBEANS-659
                 URL: https://issues.apache.org/jira/browse/NETBEANS-659
             Project: NetBeans
          Issue Type: Bug
    Affects Versions: 9.0
         Environment: Mac OS X 10.13.4,
Netbeans Build 401 (also occurs Build 406)
            Reporter: Ross Lamont


When starting up Netbeans get the following exception which the exception 
reporter wants to report:

WARNING [org.netbeans.core.windows.WindowManagerImpl]

java.lang.IllegalStateException: Problem in some module which uses Window 
System: Window System API is required to be called from AWT thread only, see 
http://core.netbeans.org/proposals/threading/

at 
org.netbeans.core.windows.WindowManagerImpl.warnIfNotInEDT(WindowManagerImpl.java:1747)

at 
org.netbeans.core.windows.WindowManagerImpl.topComponentDisplayNameChanged(WindowManagerImpl.java:1336)

at org.openide.windows.TopComponent.setName(TopComponent.java:953)

at 
com.peter.mavenrunner.MavenRunnerTopComponent.<init>(MavenRunnerTopComponent.java:114)

at 
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native
 Method)

at 
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at 
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488)

at org.openide.loaders.InstanceSupport.instanceCreate(InstanceSupport.java:197)

at 
org.openide.loaders.InstanceDataObject$Ser.instanceCreate(InstanceDataObject.java:1417)

at 
org.openide.loaders.InstanceDataObject.instanceCreate(InstanceDataObject.java:821)

at org.openide.loaders.FolderLookup$ICItem.getInstance(FolderLookup.java:572)

at 
org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:1030)

at 
org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:1010)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.computeSingleResult(ProxyLookup.java:1260)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.computeDelegate(ProxyLookup.java:1098)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.delegate(ProxyLookup.java:1065)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.delegate(ProxyLookup.java:1048)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.toArray(ProxyLookup.java:1154)

at java.base/java.util.ArrayList.addAll(ArrayList.java:596)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.computeDelegate(ProxyLookup.java:1118)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.delegate(ProxyLookup.java:1065)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.delegate(ProxyLookup.java:1048)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.isEmpty(ProxyLookup.java:1138)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.computeDelegate(ProxyLookup.java:1109)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection.access$900(ProxyLookup.java:1026)

at 
org.openide.util.lookup.ProxyLookup$LazyCollection$1.hasNext(ProxyLookup.java:1226)

at 
org.netbeans.spi.project.support.DelegatingLookupImpl.doDelegate(DelegatingLookupImpl.java:115)

at 
org.netbeans.spi.project.support.DelegatingLookupImpl.<init>(DelegatingLookupImpl.java:72)

at 
org.netbeans.spi.project.support.LookupProviderSupport.createCompositeLookup(LookupProviderSupport.java:86)

at 
org.netbeans.modules.maven.NbMavenProjectImpl.<init>(NbMavenProjectImpl.java:245)

at 
org.netbeans.modules.maven.NbMavenProjectFactory.loadProject(NbMavenProjectFactory.java:95)

at 
org.netbeans.modules.projectapi.nb.NbProjectManager.createProject(NbProjectManager.java:376)

at 
org.netbeans.modules.projectapi.nb.NbProjectManager.access$300(NbProjectManager.java:69)

at 
org.netbeans.modules.projectapi.nb.NbProjectManager$2.run(NbProjectManager.java:289)

at 
org.netbeans.modules.projectapi.nb.NbProjectManager$2.run(NbProjectManager.java:218)

at 
org.netbeans.modules.openide.util.DefaultMutexImplementation.readAccess(DefaultMutexImplementation.java:188)

at org.openide.util.Mutex.readAccess(Mutex.java:225)

at 
org.netbeans.modules.projectapi.nb.NbProjectManager.findProject(NbProjectManager.java:218)

at org.netbeans.api.project.ProjectManager.findProject(ProjectManager.java:142)

at 
org.netbeans.modules.projectapi.SimpleFileOwnerQueryImplementation.getOwner(SimpleFileOwnerQueryImplementation.java:136)

at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:91)

at 
org.netbeans.modules.java.project.ProjectClassPathProvider.findClassPath(ProjectClassPathProvider.java:43)

at org.netbeans.api.java.classpath.ClassPath.getClassPath(ClassPath.java:667)

at 
org.netbeans.modules.parsing.impl.indexing.errors.Utilities.getSourceClassPathFor(Utilities.java:63)

at 
org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.computePersistentFile(TaskCache.java:434)

at 
org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.getErrors(TaskCache.java:119)

at 
org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.isInError(TaskCache.java:359)

at 
org.netbeans.modules.parsing.ui.indexing.errors.ErrorAnnotator$1.run(ErrorAnnotator.java:286)

at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)

at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)

at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)

at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)



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