The defect suppressed a Standby Status Update message when bytes flushed to disk had changed but bytes received had not changed. If pg_recvlogical then exited with no intervening Standby Status Update, the next pg_recvlogical repeated already-flushed records. The defect could also cause superfluous messages, which are functionally harmless. Back-patch to 9.5 (all supported versions).
cee9cadb59 Fix pg_recvlogical avoidance of superfluous Standby Status Update.
src/bin/pg_basebackup/pg_recvlogical.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)