when SN 1 create to SN 2 and SN 1 send CHG no to SN 1 but SN1 side it is not updated .

[ashishsawan]

SN 2 HTTP Response :

response error -1
response length-1
Response:  [ERROR CODE:-1] Read timed out

SN 1 sending CHG no to SN 2 in response but SN 2 is not set above error is showing how to solve and which ServiceNow instance is server issue.\?