Horton

Re: More race conditions in logical replication

Alvaro Herrera <alvherre@2ndquadrant.com>

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From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Petr Jelinek <petr.jelinek@2ndquadrant.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers@postgreSQL.org, Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Date: 2017-07-15T20:15:52Z
Lists: pgsql-hackers 
After going over this a bunch more times, I found other problems.  For
example, I noticed that if I create a temporary slot in one session,
then another session would rightly go to sleep if it tries to drop that
slot.  But the slot goes away when the first session disconnects, so I'd
expect the sleeping session to get a signal and wake up, but that
doesn't happen.

I'm going to continue to look at this and report back Tuesday 18th.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Commits

  1. Fix vertical spanning in table "wait_event Description".

  2. Fix replication origin-related race conditions

  3. Fix inadequacies in recently added wait events

  4. Fix race conditions in replication slot operations