This error is very generic timeout error. It would be better if you could share the exact problem and share thread dumps. This timeout error is very common and you will be getting it when you are not able to communicate to a service.
"connection-pending remote" .. whatever the remote IP is, this system is not able to connect to it, masy be even to a specific port. This can happen if the remote system is busy or just the port to which the connection is being tried is busy or not open.
You need to check your network settings and/or the service state that is running on the unresponsive port.