Exception while removing reference: java.util.concurrent.RejectedExecutionException
java.util.concurrent.RejectedExecutionException
at java.util.concurrent.ThreadPoolExecutor$AbortPolic y.rejectedExecution(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.reject(Unk nown Source)
at java.util.concurrent.ThreadPoolExecutor.execute(Un known Source)
at java.util.concurrent.AbstractExecutorService.submi t(Unknown Source)
at sun.awt.shell.Win32ShellFolder2$ComTask.execute(Un known Source)
at sun.awt.shell.Win32ShellFolder2$FolderDisposer.dis pose(Unknown Source)
at sun.java2d.Disposer.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)