#vulnerable code 
                                public void clear() {

        if (staticResourceHandlers != null) {
            staticResourceHandlers.clear();
            staticResourceHandlers = null;
        }

        if (jarResourceHandlers != null) {
            jarResourceHandlers.clear();
            jarResourceHandlers = null;
        }

        staticResourcesSet = false;
        externalStaticResourcesSet = false;
    } 
                            #location 9 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public void clear() {

        if (staticResourceHandlers != null) {
            staticResourceHandlers.clear();
            staticResourceHandlers = null;
        }

        staticResourcesSet = false;
        externalStaticResourcesSet = false;
    }