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no matter cause this site is too useful

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Ketola
I'm sorry about the problems caused by the servers. I've been trying to find a cause for the lockups, but have so far failed. What makes it particularly dificult is that the problems mostly occur at evenings EDT, which is around 4AM over here in Finland. =)

The 500 problems point to problems with the HTTP backends sending out empty responses when they're overloaded instead of either timing out or sending a proper error reply.

I've tuned some of the HTTP backend server settings. Please post to this thread if the problems keep appearing -- or if they have disappeared.

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Ketola
The servers have been acting up a bit again today. The application server is automatically restarted if our monitoring system detects a 10 second timeout. The restart will lead to a 503 error, and the service might be slow up until restart.

When you see the 503 page, is it a generic page or one with AfterDawn layout?

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Ketola
Thanks guys. The generic page should not show up at all, so that's something I'll have to look into.

We've made a change to one particular page which could have potentially killed an entire server when it's loaded -- especially under high loads.

I'll keep monitoring the servers. Hopefully that one change is enough to make the servers run smoothly again.

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