Код ошибки pthread_join 3

у меня проблема в моем проекте. мне выдает код ошибки 3.

Я просто добавляю часть своего кода, чтобы вы видели, что я сделал. в main.cpp, который я объявил в потоках, я отправляю в initRequestThreads(в thread.h) для создания потоков. затем в main.cpp я позволяю основному процессу ждать его.

main.cpp

pthread_t *requestersThreads = new pthread_t[Length_Tasks];
requestsPool->initRequestThreads(&requestersThreads);
void*  status;


// wait for all requests threads
for(t=0; t<Length_Tasks; t++) {
    rc = pthread_join(requestersThreads[t], &status);
    if (rc) {
        cout<<"ERROR; return code from pthread_join() is "<< rc <<endl;
        exit(-1);
    }
    cout<<"Main: completed join with REQUEST thread " << t <<" having a status of "<<(long)status<<endl;
}

// wait for all resolvers threads
for(t=0; t<resolveThreadsAmount; t++) {
    rc = pthread_join(reoslveThreads[t], &status);
    if (rc) {
        cout<<"ERROR; return code from pthread_join() is "<< rc <<endl;
        exit(-1);
    }
    cout<<"Main: completed join with RESOLVER thread " << t <<" having a status of "<<(long)status<<endl;
}


delete[] tasks;
delete[] TaskQueueRequests;
delete[] TaskQueueResolves; 
//delete[] requestersThreads;
//delete[] reoslveThreads;

pthread_mutex_destroy(&TaskQueueResolves_lock);
pthread_cond_destroy(&TaskQueueResolves_cond);

ThreadPool.h

        void initRequestThreads(pthread_t **threads)
    {

        // add the attribute join for the threads
        pthread_attr_t attr;
        pthread_attr_init(&attr);
        pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);

        int rc;

        cout << "DEBUG "<< __LINE__<<": numOfThreads:"<<numOfThreadsRequests<<endl;
        for(long i = 0; i < numOfThreadsRequests; i++)
        {   
            threads[i] =  new pthread_t;
            rc = pthread_create(&(*threads[i]), &attr, ThreadPool::OperationRequestThread, (void *)this);  // create thread that get all the thread pool object(this) and preform OperationRequest function
            if(rc)
            {
                cout <<"creating Request thread failed! Error code returned is:"+rc<<endl;
                exit(-1);
            }
            cout << "DEBUG "<< __LINE__<<": Creating Request Thread #" << i+1 << "!\n";
        }

        pthread_attr_destroy(&attr);

}