BUG #15726: parallel queries failed ERROR: invalid name syntax CONTEXT: parallel worker

The following bug has been logged on the website:

Bug reference:      15726
Logged by:          Tiago ANASTACIO
Email address:      tiago_anastacio@yahoo.fr
PostgreSQL version: 11.2
Operating system:   Red Hat Enterprise Linux Server release 7.1 (Maipo
Description:        

Hello, I'am using the reporting procedure describe on wiki.

1 - Description
--------------------
I create a sample table, insert data, analyze it, select count(*) and
finally create index
All parallel queries display immediatly an error:
ERROR:  invalid name syntax
CONTEXT:  parallel worker

appli3=# create table test1(col1 bigint);
CREATE TABLE
appli3=# insert into test1 select generate_series(1,10000000);
INSERT 0 10000000
appli3=# analyse test1;
ANALYZE
appli3=# explain select count(*) from appli3adm.test1;
                                        QUERY PLAN
------------------------------------------------------------------------------------------
 Finalize Aggregate  (cost=97331.80..97331.81 rows=1 width=8)
   ->  Gather  (cost=97331.58..97331.79 rows=2 width=8)
         Workers Planned: 2
         ->  Partial Aggregate  (cost=96331.58..96331.59 rows=1 width=8)
               ->  Parallel Seq Scan on test1  (cost=0.00..85914.87
rows=4166687 width=0)
(5 rows)

appli3=# select count(*) from appli3adm.test1;
ERROR:  invalid name syntax
CONTEXT:  parallel worker
appli3=# create index test_1_col1_idx on appli3adm.test1(col1);
ERROR:  invalid name syntax
CONTEXT:  parallel worker
appli3=#

All postgresql Logs:
--------------------------
2019-04-01 12:38:27 CEST [22962]: [3-1]
user=dbaappli3,db=appli3,app=psql,xid=0,sqlstate=00000,client=[local] LOG: 
statement: create table test1(col1 bigint);
2019-04-01 12:38:47 CEST [22962]: [4-1]
user=dbaappli3,db=appli3,app=psql,xid=930,sqlstate=00000,client=[local] LOG:
 duration: 9747.640 ms  plan:
        Query Text: insert into test1 select generate_series(1,10000000);
        Insert on appli3adm.test1  (cost=0.00..17.52 rows=1000 width=8)
          ->  Subquery Scan on "*SELECT*"  (cost=0.00..17.52 rows=1000
width=8)
                Output: "*SELECT*".generate_series
                ->  ProjectSet  (cost=0.00..5.02 rows=1000 width=4)
                      Output: generate_series(1, 10000000)
                      ->  Result  (cost=0.00..0.01 rows=1 width=0)
2019-04-01 10:40:10.064 GMT [23473] ERROR:  invalid name syntax
2019-04-01 12:40:10 CEST [22962]: [5-1]
user=dbaappli3,db=appli3,app=psql,xid=0,sqlstate=42602,client=[local] ERROR:
 invalid name syntax
2019-04-01 12:40:10 CEST [22962]: [6-1]
user=dbaappli3,db=appli3,app=psql,xid=0,sqlstate=42602,client=[local]
CONTEXT:  parallel worker
2019-04-01 12:40:10 CEST [22962]: [7-1]
user=dbaappli3,db=appli3,app=psql,xid=0,sqlstate=42602,client=[local]
STATEMENT:  select count(*) from appli3adm.test1;
2019-04-01 10:40:10.065 GMT [23474] ERROR:  invalid name syntax
2019-04-01 12:40:10 CEST [22556]: [9-1]
user=,db=,app=,xid=0,sqlstate=00000,client= LOG:  background worker
"parallel worker" (PID 23473) exited with exit code 1
2019-04-01 12:40:10 CEST [22556]: [10-1]
user=,db=,app=,xid=0,sqlstate=00000,client= LOG:  background worker
"parallel worker" (PID 23474) exited with exit code 1
2019-04-01 12:40:21 CEST [22962]: [8-1]
user=dbaappli3,db=appli3,app=psql,xid=0,sqlstate=00000,client=[local] LOG: 
statement: create index test_1_col1_idx on appli3adm.test1(col1);
2019-04-01 10:40:21.784 GMT [23546] ERROR:  invalid name syntax
2019-04-01 10:40:21.784 GMT [23547] ERROR:  invalid name syntax
2019-04-01 12:40:21 CEST [22962]: [9-1]
user=dbaappli3,db=appli3,app=psql,xid=933,sqlstate=42602,client=[local]
ERROR:  invalid name syntax
2019-04-01 12:40:21 CEST [22962]: [10-1]
user=dbaappli3,db=appli3,app=psql,xid=933,sqlstate=42602,client=[local]
CONTEXT:  parallel worker
2019-04-01 12:40:21 CEST [22962]: [11-1]
user=dbaappli3,db=appli3,app=psql,xid=933,sqlstate=42602,client=[local]
STATEMENT:  create index test_1_col1_idx on appli3adm.test1(col1);
2019-04-01 12:40:21 CEST [22556]: [11-1]
user=,db=,app=,xid=0,sqlstate=00000,client= LOG:  background worker
"parallel worker" (PID 23547) exited with exit code 1
2019-04-01 12:40:21 CEST [22556]: [12-1]
user=,db=,app=,xid=0,sqlstate=00000,client= LOG:  background worker
"parallel worker" (PID 23546) exited with exit code 1
2019-04-01 12:40:36 CEST [22962]: [12-1]
user=dbaappli3,db=appli3,app=psql,xid=0,sqlstate=00000,client=[local] LOG: 
disconnection: session time: 0:02:18.357 user=dbaappli3 database=appli3
host=[local]


2 - postgresql version()
-------------------------------
appli3=# select version();
                                                 version
---------------------------------------------------------------------------------------------------------
 PostgreSQL 11.2 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5
20150623 (Red Hat 4.8.5-36), 64-bit
(1 row)

3 - Postgresql installation
-----------------------------------
community packages for red hat from
http://download.postgresql.org/pub/repos/yum/11/redhat/
lxts247a:/etc$yum list installed | grep ^postgresql11
postgresql11.x86_64                   11.2-2PGDG.rhel7        
@/postgresql11-11.2-2PGDG.rhel7.x86_64
postgresql11-contrib.x86_64           11.2-2PGDG.rhel7        
@/postgresql11-contrib-11.2-2PGDG.rhel7.x86_64
postgresql11-libs.x86_64              11.2-2PGDG.rhel7        
@/postgresql11-libs-11.2-2PGDG.rhel7.x86_64
postgresql11-llvmjit.x86_64           11.2-2PGDG.rhel7        
@/postgresql11-llvmjit-11.2-2PGDG.rhel7.x86_64
postgresql11-plpython.x86_64          11.2-2PGDG.rhel7        
@/postgresql11-plpython-11.2-2PGDG.rhel7.x86_64
postgresql11-server.x86_64            11.2-2PGDG.rhel7        
@/postgresql11-server-11.2-2PGDG.rhel7.x86_64

4 - Changes made to postgresql.conf from the sample file
/usr/pgsql-11/share/postgresql.conf.sample
----------------------------------------------------------------------------
listen_addresses = '*'
port = 54322
superuser_reserved_connections = 6
unix_socket_directories = '/var/run/postgresql
unix_socket_permissions = 0722
authentication_timeout = 20s
password_encryption = md5
ssl = on
ssl_ca_file = '/home/appli3/appli/connexion/dbaappli3/tls/root.crt'
ssl_cert_file = '/home/appli3/appli/connexion/dbaappli3/tls/server.crt'
ssl_key_file = '/home/appli3/appli/connexion/dbaappli3/tls/server.key'
shared_buffers =  2GB
temp_buffers = 32MB
work_mem = 128MB
maintenance_work_mem = 3GB
autovacuum_work_mem = 64MB
max_stack_depth = 6MB 
vacuum_cost_limit = 2000
effective_io_concurrency = 256
effective_io_concurrency = 256                
max_worker_processes = 8              
max_parallel_maintenance_workers = 2 
max_parallel_workers_per_gather = 2  
parallel_leader_participation = on
max_parallel_workers = 4              
wal_level = replica
fsync = on
synchronous_commit = remote_write
wal_compression = on
wal_log_hints = on
checkpoint_timeout = 30min
max_wal_size = 15GB
checkpoint_completion_target = 0.9
archive_mode = on
 archive_command = 'test ! -f /home/backupdb/appli3/archxlog/%f.gz && cp %p
/home/backupdb/appli3/archxlog/%f && gzip /home/backupdb/appli3/archxlog/%f'
              # command to use to archive a logfile segment
 archive_timeout = 60s
max_wal_senders = 18
wal_keep_segments = 0
max_replication_slots = 8
hot_standby = on
random_page_cost = 1.0
 effective_cache_size = 6GB
 jit = on
log_checkpoints = on
log_connections = on
log_disconnections = on
log_line_prefix = '%t [%p]: [%l-1]
user=%u,db=%d,app=%a,xid=%x,sqlstate=%e,client=%h ' 
log_statement = 'ddl'                 # none, ddl, mod, all
log_temp_files = 4MB                  # log temporary files equal or
larger
log_timezone = 'Europe/Paris'
 cluster_name = 'appli3' 
track_io_timing = on
track_functions = all                 # none, pl, all
track_activity_query_size = 65536     # (change requires restart)
 autovacuum = on
 log_autovacuum_min_duration = 60000
autovacuum_vacuum_scale_factor = 0.01
autovacuum_analyze_scale_factor = 0.10
search_path = 'appli3adm, common, dba, "$user"'
default_tablespace = 'data'
temp_tablespaces = 'data'
lc_messages = 'C'
lc_monetary = 'fr_FR.utf8'
lc_numeric = 'fr_FR.utf8'
lc_time = 'fr_FR.utf8' 
default_text_search_config = ''  #default 'pg_catalog.simple'
shared_preload_libraries = 'auto_explain, pg_stat_statements, auth_delay,
passwordcheck, plugin_debugger, repmgr'
 max_locks_per_transaction = 256
 include_dir = 'pg_includes'
include_if_exists =
'/home/appli3/appli/connexion/dbaappli3/custom/postgresql_custom.conf' 
 auth_delay.milliseconds = 100          
 auto_explain.log_min_duration = '5s'
 auto_explain.log_analyze = off         
 auto_explain.log_buffers = on          
 auto_explain.log_timing = on           
 auto_explain.log_triggers = on         
 auto_explain.log_verbose = on          
 auto_explain.log_format = text         
 auto_explain.log_nested_statements = on
 pg_stat_statements.max  = 10000        
 pg_stat_statements.track = all         
                                        
4 - OS details
------------------
OS
-----
Red Hat Enterprise Linux Server release 7.1 (Maipo)

Kernel
--------
lxts247a:/tmp$uname -a
Linux lxts247a 3.10.0-229.el7.x86_64 #1 SMP Thu Jan 29 18:37:38 EST 2015
x86_64 x86_64 x86_64 GNU/Linux

CPU:
-------
lxts247a:/etc$lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                12
On-line CPU(s) list:   0-11
Thread(s) per core:    1
Core(s) per socket:    12
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 63
Model name:            Intel(R) Xeon(R) CPU E5-2670 v3 @ 2.30GHz
Stepping:              2
CPU MHz:               2297.339
BogoMIPS:              4594.67
Hypervisor vendor:     VMware
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              30720K
NUMA node0 CPU(s):     0-11

MEMORY
-------------
lxts247a:/etc$free
              total        used        free      shared  buff/cache  
available
Mem:       32782068     1139348     2799556      686408    28843164   
30606124
Swap:       4194300         436     4193864

6 - full logs are describe on 1-
Full error message is:
 ERROR:  invalid name syntax
CONTEXT:  parallel worker

7- client
-----------
local psql 
lxts247a:/tmp$psql -V
psql (PostgreSQL) 11.2

8-log 
I ssee nothing special in the logs parallel_workers are new to me.


Thank you very much for your help guys

Tiago ANASTACIO
Independant DBA