Aaron Ogburn created MODCLUSTER-427:
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Summary: mod_cluster can break stickiness for the first request on new child
processes
Key: MODCLUSTER-427
URL:
https://issues.jboss.org/browse/MODCLUSTER-427
Project: mod_cluster
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: Native (httpd modules)
Affects Versions: 1.3.1.Alpha1, 1.2.9.Final
Environment: -JBoss EAP 6.3.0
Reporter: Aaron Ogburn
Assignee: Jean-Frederic Clere
mod_cluster can break stickiness for the first request on new child processes. It looks
like this occurs specifically when "CreateBalancers 1" is used. Prefork
typically makes this much worse as well.
My debugging showed that the proxy_balancer would exist, but it would essentially be empty
in the new child process. find_session_route/find_route_worker would be called as
expected, but the for loop in find_route_worker wasn't even doing anything because
balancer->workers->nelts was 0. The balancer would then finally be populated in the
new child when the first request hits internal_find_best_byrequests and calls
update_workers_node.
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