Python: decryption failed or bad record mac when calling from Thread

Ok, looks like I've fixed the problem. I was creating too many connections and seems I was running out of memory or something. I gathered all the queries and do cursor.execute(...) once with a huge query, instead performing hundreds of small queries/connections.

conn = psycopg2.connect(...)
cursor = conn.cursor()
cursor.execute("SELECT id, ip FROM schema.table;")
rows = cursor.fetchall()
cursor.close()
conn.commit()
conn.close()
conn = None

The cause of this issue could be, there were too many processes(multi) were trying to access PostGres, it was not able to handle that. I was using Django & PostGres in BeanStalk.

Adding 'OPTIONS': {'sslmode': 'disable'} in the database config helped.

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': ...
        'USER': ....
        'PASSWORD': ...
        'HOST': ....
        'PORT': '5432',
        'OPTIONS': {
           'sslmode': 'disable',
        }
    }
}