HTTP Request Error: Unreachable Status
https://wdgd.jnj.com:8400/sap/wdisp/admin/public/session_logon.html 
1 . Detailed description of the Issue: The alert was generated for HTTP Request Error: Unreachable Status 
2 . GXP impact : No 
3. Actions taken: Checked web dispatcher status and link status by manually visiting the link. 
4. Root cause: the alert was generated due to wrong port being user. that is instead of 8100 it should be 8400. 
5. Workaround: NA 
6. Solution: the correct link is https://wdgd.jnj.com:8400/sap/wdisp/admin/public/session_logon.html. screenshot has been provided in the logs. 
7. customer feedback : NA 
8. Change reference: NA