[BUGS] BUG #14839: failed archive log messages are merged as 1 message

The following bug has been logged on the website:

Bug reference:      14839
Logged by:          Evan Rempel
Email address:      evan.r.rempel@gmail.com
PostgreSQL version: 9.6.5
Operating system:   Redhat EL6.9
Description:

A description of what you are trying to achieve and what results you
expect.:

Just letting the server run with a failing archive command. The messages
logged by the postgresql process get merged together.

PostgreSQL version number you are running:

9.6.5

How you installed PostgreSQL:

Installed from pgdb RPM repository.

Changes made to the settings in the postgresql.conf file:  see Server
Configuration for a quick way to list them all.

max_connections = 500                   # (change requires restart)
listen_addresses = '*,localhost'   # what IP address(es) to listen on;
shared_buffers = '3996MB'
work_mem = '8MB'
wal_level = replica                    # minimal, replica, or logical
max_wal_size = 10GB
min_wal_size = 80MB
archive_mode = on             # enables archiving; off, on, or always
archive_command =
'/home1l/postgres/UVIC/common/scripts/postgres/pg_backup.sh PGPOOL2
walBackup "%p"'
log_destination = 'syslog'
syslog_facility = 'LOCAL0'
syslog_ident = 'postgres'
syslog_sequence_numbers = on
syslog_split_messages = off
client_min_messages = log
log_min_messages = info
log_min_error_statement = info
log_min_duration_statement = 10000
log_checkpoints = on
log_connections = on
log_disconnections = on
log_line_prefix = 'PGPOOL2:%d:%u:%h '                     # special
values:
cluster_name = 'PGPOOL2'


Operating system and version:

Redhat EL6.9
Linux myhost 2.6.32-696.el6.x86_64 #1 SMP Tue Feb 21 00:53:17 EST 2017
x86_64 x86_64 x86_64 GNU/Linux

What program you're using to connect to PostgreSQL:

No program connecting. Strictly a PostgreSQL server bug.
Is there anything relevant or unusual in the PostgreSQL server logs?:

Server syslog is the bug and shows:

2017-09-28T08:59:48.097 myhostname local0.err postgres[33550]: [5]
PGPOOL2::: FATAL:  archive command was terminated by signal 9: Killed
PGPOOL2::: DETAIL:  The failed archive command was:
/home1l/postgres/UVIC/common/scripts/postgres/pg_backup.sh PGPOOL2 walBackup
"pg_xlog/000000010000000000000001"

For questions about any kind of error:

no questions

What you were doing when the error happened / how to cause the error:

A misconfigured archive command.

The EXACT TEXT of the error message you're getting, if there is one: (Copy
and paste the message to the email, do not send a screenshot)

The bug I am reporting is that the logged messages includes two messages.
The above log message should have been logged as:

2017-09-28T08:59:48.097 myhostname local0.err postgres[33550]: [5]
PGPOOL2::: FATAL:  archive command was terminated by signal 9: Killed

2017-09-28T08:59:48.097 myhostname local0.err postgres[33550]: [6]
PGPOOL2::: DETAIL:  The failed archive command was:
/home1l/postgres/UVIC/common/scripts/postgres/pg_backup.sh PGPOOL2 walBackup
"pg_xlog/000000010000000000000001"




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