Forum Discussion
Matvey_182654
Nimbostratus
Dear Hannes Rapp, It is doesn't matter. We tryed to update an other device without any virtual servers, but with just few http monitors, so the problem consistently repeated.
Hannes_Rapp
Nov 23, 2015Nimbostratus
There are many potential causes, and it does matter for one of the possible root causes. With that said, its indeed a quite common error that can be triggered by a number of problems. For instance, a malformed pool member response.
Have a look at this thread for more ideas to troubleshoot your error: https://devcentral.f5.com/questions/http_process_state_prepend-invalid-action0x109010