CCMET_Metrotesting: ERR_CONNECTION_TIMED_OUT To ensure that the web service is running normally, if it is running normally, check whether the 80 port rule exists, and if the server operator has a security group policy, you also need to add the releas...

The ClassCastException thrown to indicate that your code has attempted to cast an object to a subclass of which it is not an instance. Casting only works when the casted object follows an is a relationship to the type you are trying to cast to. When ...