private boolean isFileModified() {
        //SHIRO-394: strip file prefix before constructing the File instance:
        String fileNameWithoutPrefix = this.resourcePath.substring(this.resourcePath.indexOf(":") + 1);
        File propertyFile = new File(fileNameWithoutPrefix);
        long currentLastModified = propertyFile.lastModified();
        if (currentLastModified > this.fileLastModified) {
            this.fileLastModified = currentLastModified;
            return true;
        } else {
            return false;
        }
    }
Destroy reload scheduler if one exists.
core/src/main/java/org/apache/shiro/realm/text/PropertiesRealm.java