ProxyPass ttl property does not work with prefork MPM on Apache httpd 2.2/2.4

Solution Unverified - Updated 2025-03-06T08:06:14+00:00 -

English

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Environment

• Apache httpd
  • 2.2
  • 2.4

Issue

• The ttl setting of ProxyPass does not work with prefork setting. Is there any other configuration to make ttl setting valid?

Resolution

The ttl setting of ProxyPass does not become effective with prefork MPM. It works with worker and event MPM.
Unfortunately, there's any alternative configuration. So, please use worker or event MPM if you would like to tune ttl setting.

Root Cause

• Enhancement request Bug 54976 was filled in the upstream bug tracker more than 10 years ago, but ttl is still not read when using prefork.
  • Bug 54976 - ProxyPass parameter "acquire" and "ttl" ignored in prefork MPM

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