Re: Potential G2-item cycles under serializable isolation

On Thu, Jun 4, 2020 at 3:52 PM Kyle Kingsbury <aphyr@jepsen.io> wrote:
> Naw, that's ok. :homebrew-upsert-failed is just letting you know that we couldn't do the update-insert-update dance.
Shouldn'tbe any safety impact. :-)
 

I also notice some deadlocks when inserting -- not duplicate violations:

1591311225.473 170332 1197463 INSERT waiting 5ed97b3c.2995c jepsen
process 25 LOG:  process 170332 still waiting for ShareLock on
transaction 1197460 after 1000.091 ms
1591311225.473 170332 1197463 INSERT waiting 5ed97b3c.2995c jepsen
process 25 DETAIL:  Process holding the lock: 170418. Wait queue:
170332, 170450, 170478.
1591311225.473 170332 1197463 INSERT waiting 5ed97b3c.2995c jepsen
process 25 CONTEXT:  while inserting index tuple (3,176) in relation
"txn0_pkey"
1591311225.474 170450 1197458 INSERT waiting 5ed97b5b.299d2 jepsen
process 55 LOG:  process 170450 detected deadlock while waiting for
ShareLock on transaction 1197460 after 1000.086 ms
1591311225.474 170450 1197458 INSERT waiting 5ed97b5b.299d2 jepsen
process 55 DETAIL:  Process holding the lock: 170418. Wait queue:
170332, 170478.
1591311225.474 170450 1197458 INSERT waiting 5ed97b5b.299d2 jepsen
process 55 CONTEXT:  while inserting index tuple (5,279) in relation
"txn0_pkey"

Are they expected?

-- 
Peter Geoghegan