Have you ever got this error in PHP? I bet no, never.
Basically, it happens when you serialize an object
of class A and try to unserialize it when class
A doesn’t exist anymore.
How (the hell) do I get there?
If you are working with auto-generated proxy classes, store objects in the session and then clear your cache, once you retrieve an object from the session you are going to face it. A solution is to re-generate all the proxies before retrieving objects from the session1.
Notes
- in an ideal world, at every deployment you clear and re-generate proxies ↩