session cookie persistence question

Pending rule event HTTP_REQUEST aborted for ... (listener: /Common/Drupal_HTTP)

i may be wrong but i think it means connection is terminated (for whatever reason) before irule is complete.

by the way, these are my comments.

1) for static variable (e.g. maxReqs, cooldownTimer, sampleTimer, timeout),

static

https://clouddocs.f5.com/api/irules/static.html

2) in No session cookie found. Quitting section, you may use "return" to exit the current event. event disable does not exit from the event.

event

https://clouddocs.f5.com/api/irules/event.html

 irule

[root@ve11a:Active:In Sync] config  tmsh list ltm rule qux
ltm rule qux {
    when HTTP_REQUEST {
  log local0. "priority 500: before"
  event HTTP_REQUEST disable
  log local0. "priority 500: after"
}
when HTTP_REQUEST priority 600 {
  log local0. "priority 600"
}
when HTTP_RESPONSE {
  log local0. "priority 500"
}
}

 /var/log/ltm

[root@ve11a:Active:In Sync] config  tail -f /var/log/ltm
Jun  8 11:45:34 ve11a info tmm[9801]: Rule /Common/qux HTTP_REQUEST: priority 500: before
Jun  8 11:45:34 ve11a info tmm[9801]: Rule /Common/qux HTTP_REQUEST: priority 500: after
Jun  8 11:45:35 ve11a info tmm[9801]: Rule /Common/qux HTTP_RESPONSE: priority 500

3) in set currCount [table add $key 1] section, when will table add return null?

table

https://clouddocs.f5.com/api/irules/table.html