java.util.concurrent.TimeoutException

Hi
i have a problem, in my application when i get a first row
"ViewRow row=viewResult.allRows().get(0);"
i receive in log a this error:
Error in xxxxx: java.util.concurrent.TimeoutException…
Why ?
How can I fix ?

In the past, we’ve seen causes for this to be things like ports being blocked or incorrect DNS configurations. What can you tell us about the network between your client and server?