authentication failure

Hi there

I have a process in place which runs several queries from one host to another one

All of a sudden I started noticing authentication failures

Like below

.009 ms statement: COPY NACDS.tf_show_code_response_person FROM STDIN with csv;",,,,,,,,,"psql"
2018-04-12 00:10:48.765 CDT,"csidba","birstdb",7553,"172.16.20.4:40330",5aceea2e.1d81,1,"UPDATE",2018-04-12 00:10:06 CDT,24/0,0,LOG,00000,"duration: 425
90.993 ms statement: UPDATE
csischema.tf_transaction_person
SET
is_deleted = 'TRUE',
birst_is_deleted = 'TRUE',
update_datetime = now()::timestamp(0)
WHERE
show_id = '984BIOWC18' AND
birst_is_deleted = 'FALSE' AND
person_transaction_id IN (
SELECT a.person_transaction_id
FROM csischema.tf_transaction_person a
LEFT JOIN BIOWC.tf_transaction_person b
ON a.person_transaction_id=b.person_transaction_id
WHERE a.show_id = '984BIOWC18' AND b.person_transaction_id IS NULL
)
;",,,,,,,,,"psql"
2018-04-12 00:10:48.823 CDT,"csidba","birstdb",7755,"172.16.20.4:40455",5aceea58.1e4b,1,"authentication",2018-04-12 00:10:48 CDT,3/20320168,0,FATAL,28P0
1,"password authentication failed for user ""csidba""","Connection matched pg_hba.conf line 84: ""host all all 0.0.0.0/0 md5""",,,,,,,,""
2018-04-12 00:10:48.841 CDT,"csidba","birstdb",7756,"172.16.20.4:40456",5aceea58.1e4c,1,"authentication",2018-04-12 00:10:48 CDT,3/20320169,0,FATAL,28P0
1,"password authentication failed for user ""csidba""","Connection matched pg_hba.conf line 84: ""host all all 0.0.0.0/0 md5""",,,,,,,,""
2018-04-12 00:10:48.957 CDT,"csidba","birstdb",7759,"172.16.20.4:40459",5aceea58.1e4f,1,"authentication",2018-04-12 00:10:48 CDT,3/20320172,0,FATAL,28P0

pg_hba.conf

# "local" is for Unix domain socket connections only
#local all all peer
local all all md5
# IPv4 local connections:
#host all all 127.0.0.1/32 ident
host all all 0.0.0.0/0 md5
# IPv6 local connections:
host all all ::1/128 ident
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local replication postgres peer
#host replication postgres 127.0.0.1/32 ident
#host replication postgres ::1/128 ident
local replication csidba md5
host replication csidba 127.0.0.1/32 md5
host replication csidba 0.0.0.0/0 md5
local replication repuser md5
host replication repuser 127.0.0.1/32 md5
host replication repuser 0.0.0.0/0 md5
local all repuser md5
host all repuser 127.0.0.1/32 md5
host all repuser 0.0.0.0/0 md5

Did I run in somthing similar to a racong condition ?

Any ideas ?

Many thanks

— Armand