HTTPS Redirection issue

  We are having redirection issue when replaying scripts(HTTP Protocol) in controller . ALL the web request links start with HTTPS. The scripts execute all transactions  successfully until 30 minutes into the test. After 30 minutes  mark all transactions were Redirected to log in page causing response time to minimal.The loadrunner logs  show  request is redirecting to Log on.jsp.( Log on page).Pleaseseehe examplelogmessage below

Action.c(35): Redirecting "https://xxx.1907.com/xxxapp/checkSession.html" (redirection depth is 0)                  [MsgId: MMSG-26694]

Action.c(35): To location "https://xxxx.1907.com/pub/logon.jsp"         [MsgId: MMSG-26693]

I will highly appreciate any help  to resolve above  issue

Thanks