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Diffstat (limited to 'src/backend/postmaster/postmaster.c')
| -rw-r--r-- | src/backend/postmaster/postmaster.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c index 9bcbf212f8c..412bc96465c 100644 --- a/src/backend/postmaster/postmaster.c +++ b/src/backend/postmaster/postmaster.c @@ -2317,6 +2317,26 @@ reaper(SIGNAL_ARGS) pmState = PM_RUN; /* + * Kill any walsenders to force the downstream standby(s) to + * reread the timeline history file, adjust their timelines and + * establish replication connections again. This is required + * because the timeline of cascading standby is not consistent + * with that of cascaded one just after failover. We LOG this + * message since we need to leave a record to explain this + * disconnection. + * + * XXX should avoid the need for disconnection. When we do, + * am_cascading_walsender should be replaced with RecoveryInProgress() + */ + if (max_wal_senders > 0) + { + ereport(LOG, + (errmsg("terminating walsender all processes to force cascaded" + "standby(s) to update timeline and reconnect"))); + SignalSomeChildren(SIGUSR2, BACKEND_TYPE_WALSND); + } + + /* * Crank up the background writer, if we didn't do that already * when we entered consistent recovery state. It doesn't matter * if this fails, we'll just try again later. |