Hi, On 2018-08-29 17:43:17 +0200, Erik Rijkers wrote: > To test postgres 11, I still regularly run series of short sessions of > pgbench-over-logical-replication (basically the same thing that I used last > year [1] - now in a perl incarnation). Most of the time the replication is > stable and finishes correctly but sometimes (rarely) I get: > > TRAP: FailedAssertion("!(TransactionIdPrecedesOrEquals(safeXid, > snap->xmin))", File: "snapbuild.c", Line: 580) > > This will probably be difficult to reproduce and to act upon but I wanted to > report it anyway as in the course of the last few months I have seen it > several times, on several machines. Always rarely, always postgres 11 (I did > not try other versions).
Thanks for testing! Could you possibly run the tests with core files enabled, so we at get a backtrace in case of trouble? Knowing what the values here are would be tremendously helpful... Greetings, Andres Freund