multithreading - Java shared condition between classes throws IllegalMonitorStateException: null -

i have structure this:
lock wrapper - used store lock, condition , object response

public class lockwrapper{     private lock lock;     private condition mycondition;     private myobject myobject;      public lockwrapper(lock lock, condition mycondition) {         this.lock = lock;         this.mycondition = mycondition;     }      public condition getmycondition() {         return mycondition;     }      public myobject getmyobject() {         return myobject;     }      public void setobject(myobject myobject) {         this.myobject = myobject;     }      public lock getlock() {         return lock;     }  } 

task - pushed thread pool execution. initiates requests server , waits server responses.

public class mytask implements runnable{     private lock lock = new reentrantlock();     private condition mycondition = lock.newcondition();     private mywebsocketapi api;      public mytask(mywebsocketapi api) {          this.api = api;     }      @override     public void run() {          lock.lock();          try {               // long randomlong = generaterandomlong();               api.sendrequest(randomlong, new lockwrapper(lock, mycondition));               mycondition.await();               //do after got response          } finally{               lock.unlock();          }     }  } 

websocket - gets requests , notifies tasks responses

 public abstract class mywebsocketapi extends websocketclient {     //...     private map<long, lockwrapper> lockwrappers = new concurrenthashmap<>();      public void sendrequest(long id, lockwrapper lockwrapper){         this.lockwrappers.put(id, lockwrapper);         //processrequest     }      @override     public void onmessage(string message) {         lockwrapper lockwrapper = lockwrappers.get(message.get(0).getaslong());          lockwrapper.getlock().lock();         try{             lockwrapper.setmyobject(new myobject(message));             this.lockwrappers.put(message.get(0).getaslong(), lockwrapper);             lockwrapper.getmycondition().signalall();         } {             lockwrapper.getlock().unlock();         }     }      //...  } 

line lockwrapper.getmycondition().signalall(); throws exception:

java.lang.illegalmonitorstateexception: null     @ java.util.concurrent.locks.abstractqueuedsynchronizer$conditionobject.signalall(abstractqueuedsynchronizer.java:1954) 

why conditions throw exception when try notify tasks got objects? did make mistake somewhere or java doesn't allow shared conditions?

it error in task. problem was creating lock , condition both global , local in method run. lock , condition had same name. in cases using lock , in cases this.lock (but 2 different locks). result, in method onmessage had condition , lock not connected together. after removed duplicates works.