Recently on one of my projects I had to replace the Web Front End (WFE) due to some memory problems. Switching the WFE went smoothly, but after a day I had errors popping in the ULS logs and I was getting "Request time out" issues. Ther error in ULS log was:
UserAgent not available, file operations may not be optimized. at Microsoft.SharePoint.SPFileStreamManager.CreateCobaltStreamContainer(SPFileStreamStore spfs, ILockBytes ilb, Boolean copyOnFirstWrite, Boolean disposeIlb)…………….
I came across couple of posts about clearing blob cache etc but it didn't work for me.
After spending couple of hours investigating and comparing the settings with old WFE, the issue turned out to be firewall settings, the WFE didn't have access to internet. A weather webpart on the home page was quering the net for weather info on the server side. Once the (appropriate) firewall rules were applied everything worked fine....
hth
UserAgent not available, file operations may not be optimized. at Microsoft.SharePoint.SPFileStreamManager.CreateCobaltStreamContainer(SPFileStreamStore spfs, ILockBytes ilb, Boolean copyOnFirstWrite, Boolean disposeIlb)…………….
I came across couple of posts about clearing blob cache etc but it didn't work for me.
After spending couple of hours investigating and comparing the settings with old WFE, the issue turned out to be firewall settings, the WFE didn't have access to internet. A weather webpart on the home page was quering the net for weather info on the server side. Once the (appropriate) firewall rules were applied everything worked fine....
hth
