No route to host error from bitbucket to jenkins webhook

[pavan]

When I defined a webhook the jenkins url test connection it self getting failed , earlier it was working fine...

[Nic Brough -Adaptavist-]

Your question suggests you're getting a "no route to host" error.  This is a network problem, it means the server cannot reach the other one over the network.

Did you get this fixed?  Was it the network connection?