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follow-ups for compare-and-swap in governor

Georgy Moshkin requested to merge gmoshkin/more-cas-tweaks into master

Summary

  • fix: add instance id to cas predicate when changing replicaset's target master

Strictness!

  • fix: move automatic cas-predicate construction to the server side

  • refactor: Predicate::check_entry -> check_predicate

  • fix: retry "not a leader" errors when self-activating on startup

  • fix: picodata expel calls proc_expel_redirect

  • fix: make sure local compare-and-swap requests are never redirected

  • fix: don't block the event loop in pico.raft_log()

  • Close #785 (closed)
  • Relates to #856 (closed)
  • Follow-up for !1254 (merged)
  • Cherry-pick to: none
  • Docs follow-up: proc_cas behaviour: if predicate has empty ranges, they'll be auto-generated based on the raft operation. Spefically if it's a dml the ranges will just check for equality with the primary key of the operations
Edited by Yaroslav Dynnikov

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