org.openide.filesystems.FileAlreadyLockedException: org-netbeans-api-project-libraries/libraries-timestamps.properties
   at org.openide.filesystems.StreamPool$2.write(StreamPool.java:147)
   at java.io.OutputStream.write(OutputStream.java:116)
   at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
   at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)
   at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:295)
   at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
   at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
   at java.io.BufferedWriter.flush(BufferedWriter.java:254)
   at java.util.Properties.store0(Properties.java:844)
   at java.util.Properties.store(Properties.java:818)
   at org.netbeans.modules.project.libraries.LibrariesStorage.saveTimeStamps(LibrariesStorage.java:524)
   at org.netbeans.modules.project.libraries.LibrariesStorage.fileChanged(LibrariesStorage.java:478)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEventImpl(FCLSupport.java:178)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapperSingle.dispatchAllEventsSync(FCLSupport.java:224)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEvent(FCLSupport.java:137)
   at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:105)
   at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:1398)
   at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:213)
   at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:188)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:129)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:519)
   at org.netbeans.modules.project.libraries.LibrariesStorage.writeLibrary(LibrariesStorage.java:305)
   at org.netbeans.modules.project.libraries.LibrariesStorage.addLibrary(LibrariesStorage.java:357)
   at org.netbeans.api.project.libraries.LibraryManager.createLibrary(LibraryManager.java:357)
   at org.netbeans.api.project.libraries.LibraryManager.createLibrary(LibraryManager.java:314)
   at org.netbeans.modules.glassfish.javaee.JavaEEServerModuleFactory.addLibrary(JavaEEServerModuleFactory.java:427)
   at org.netbeans.modules.glassfish.javaee.JavaEEServerModuleFactory.addLibrary(JavaEEServerModuleFactory.java:326)
   at org.netbeans.modules.glassfish.javaee.JavaEEServerModuleFactory.ensureGlassFishApiSupport(JavaEEServerModuleFactory.java:320)
   at org.netbeans.modules.glassfish.javaee.JavaEEServerModuleFactory.access$200(JavaEEServerModuleFactory.java:79)
   at org.netbeans.modules.glassfish.javaee.JavaEEServerModuleFactory$1.run(JavaEEServerModuleFactory.java:150)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)