> To: Pengchengliu <pengcheng...@tju.edu.cn> > Cc: Greg Nancarrow <gregn4...@gmail.com>; Andres Freund <and...@anarazel.de>; > PostgreSQL-development <pgsql-hack...@postgresql.org> > Subject: Re: Re: Parallel scan with SubTransGetTopmostTransaction assert > coredump
> I've also seen the reports of the same > Assert(TransactionIdFollowsOrEquals(xid, TransactionXmin)) with a subsequent > crash in a parallel worker in PostgreSQL v11-based > build, Though I was unable to investigate deeper and reproduce the issue. The > details above in the thread make me think it is a real and > long-time-persistent error that is > surely worth to be fixed. I followed Liu's reproduce steps and successfully reproduce it in about half an hour running. My compile option is : " ./configure --enable-cassert --prefix=/home/pgsql". After applying greg-san's change, the coredump did not happened in two hour(it is still running). Note, I have not taken a deep look into the change, just provide some test information in advance. Best regards, houzj
