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This is an odd problem and I’m not sure how to
describe it exactly. About 2 months ago (at least that’s when we first noticed)
we started having weird problems with our website. The types of problems we
would see are the following:
The problem is VERY intermittent, about once a day, and
usually only lasts for < 2 minutes. It will then go away with no
intervention. Most of the time, the problem is gone by the time we can start
troubleshooting, which makes it hard to get specifics. When the problem occurs,
all 3 of those problems are happing. I can click on a link and get text,
click reload and get some completely different page, click reload again and get
the correct page displayed properly, click reload again and the formatting is
all messed up, etc. And then the problem will just go away. This is how our system is configured: We are running 64-bit Apache 2.0.59 on Suse 10.2. The Apache
server is responsible for server static pages and images, doing SSL and load
balancing. It load balances between 2-64-bit JBoss 4.2.1 servers, also running
on Suse 10.2 Apache is configured with 3 virtual hosts on their own IP
addresses. It communicates with JBoss via mod_jk (v. 1.2.25) These are the facts about the problem:
We have only had 1 time where the problem persisted for
about 20 minutes while we tried to fix it. That’s when we restarted all
the JBoss services and Apache, but the problem was still there. We then
actually reboot the Apache server, and the problem was gone. Since the server
took about 15 minutes to reboot, we can’t be sure that the problem didn’t
just go away on its own during that time making it just a coincidence. We are just hoping that maybe someone has seen this before.
Despite all our scrambling when it happens and searches on Google, we really
aren’t any closer to an answer. Sean |
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