@Override public boolean authenticateUser(String principal, AuthenticationToken token) throws AccumuloSecurityException { if (!(token instanceof PasswordToken)) throw new AccumuloSecurityException(principal, SecurityErrorCode.INVALID_TOKEN); PasswordToken pt = (PasswordToken) token; byte[] pass; String zpath = ZKUserPath + "/" + principal; pass = zooCache.get(zpath); boolean result = ZKSecurityTool.checkPass(pt.getPassword(), pass); if (!result) { zooCache.clear(zpath); pass = zooCache.get(zpath); result = ZKSecurityTool.checkPass(pt.getPassword(), pass); } return result; }