I suspect this is caused by an IIS6 setting, but posting here in case anyone has seen this. For this one particular site, we have 4 servers in the farm. 2 of those servers are fine. The other 2 (new) servers will generate probe failure after the site's app pool recycles. I then remove the 2 servers from service and re-activate (no inservice, then inservice) and the probe comes back as operational. It appears that the app pool recycle somehow is resetting the hash on the default page, though I'm not sure how. Any ideas are very much appreciated.
Yeah, the hash is inside the probe. Here's the config for the serverfarm and the probe. Public-007 and Public-008 are new servers...the other 6 have been in the farm for the last 2.5 years and they don't have this issue. It's only the 2 new boxes that the probe fails when the app pool is recycled.
We ran into same issue here. The documentation says that the ACE is taking the hash from the site that it gets from the server. So far so good, but if this hash is changing the server is marked offline. Problem is, I did not found any coomand to display this hash. Even the "show probe XXX detail" dont show anything. The old CSS was able to show the hash value so you can check it. Question the the crowd: Which command shows me the hash value of the probe?
Maybe you should check if the 2 new server are changing something in the website (maybe something in header) which is sent after the app pool is recycled!
We figured it out. You have to edit the machine.config to support a load balanced environment. We had already done that for .Net 2.0, but this was the only site running .Net 1.1 on these 2 new boxes. We hadn't edited 1.1 yet.
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