javax.crypto.BadPaddingException: Given final block not properly padded. Such issues can arise if a bad key is used during decryption. java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at io.moquette.imhandler.IMHandler.getDataObject(IMHandler.java:112) at io.moquette.imhandler.IMHandler.lambda$doHandler$0(IMHandler.java:204) at cn.wildfirechat.server.ThreadPoolExecutorWrapper.lambda$execute$0(ThreadPoolExecutorWrapper.java:37) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:750) Caused by: java.lang.NullPointerException at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:188) at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:193) at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:49) at cn.wildfirechat.proto.WFCMessage$Message.parseFrom(WFCMessage.java:25813) ... 14 more