java.util.concurrent.ExecutorService.isShutdown()' on a null object reference

[MrR0990]

Non-fatal Exception: java.lang.NullPointerException: Attempt to invoke interface method 'boolean java.util.concurrent.ExecutorService.isShutdown()' on a null object reference
at com.easysocket.connection.dispatcher.CallbackResponseDispatcher$1.run(CallbackResponseDispatcher.java:89)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)