#vulnerable code 
                                protected void releaseTemporaryWriter() {
        try {
            IoUtils.closeQuietly(getTemporaryFileWriter());
        } catch (IOException e) {
            // silently skip
        }
        if (temporaryFile != null) {
           temporaryFile.delete();
        }
        temporaryFile = null;

    } 
                            #location 8 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                protected void releaseTemporaryWriter() {
        try {
            IoUtils.closeQuietly(getTemporaryFileWriter());
        } catch (IOException e) {
            // silently skip
        }
        if (temporaryFile != null) {
            temporaryFile.delete();
        }
        temporaryFile = null;

    }