#fixed code
                                @Override
    protected void processEvents(int readyCount) throws IOReactorException {
        processSessionRequests();
        
        if (readyCount > 0) {
            Set<SelectionKey> selectedKeys = this.selector.selectedKeys();
            for (Iterator<SelectionKey> it = selectedKeys.iterator(); it.hasNext(); ) {
                
                SelectionKey key = it.next();
                processEvent(key);
                
            }
            selectedKeys.clear();
        }
        
        long currentTime = System.currentTimeMillis();
        if ((currentTime - this.lastTimeoutCheck) >= this.selectTimeout) {
            this.lastTimeoutCheck = currentTime;
            Set<SelectionKey> keys = this.selector.keys();
            processTimeouts(keys);
        }
    }
#vulnerable code 
                                @Override
    protected void processEvents(int readyCount) throws IOReactorException {
        processSessionRequests();
        
        if (readyCount > 0) {
            Set<SelectionKey> selectedKeys = this.selector.selectedKeys();
            for (Iterator<SelectionKey> it = selectedKeys.iterator(); it.hasNext(); ) {
                
                SelectionKey key = it.next();
                processEvent(key);
                
            }
            selectedKeys.clear();
        }
        
        long currentTime = System.currentTimeMillis();
        if ((currentTime - this.lastTimeoutCheck) >= this.selectTimeout) {
            this.lastTimeoutCheck = currentTime;
            Set<SelectionKey> keys = this.selector.keys();
            synchronized (keys) {
                processTimeouts(keys);
            }
        }
    } 
                            #location 17 
                            #vulnerability type THREAD_SAFETY_VIOLATION