This seems to be an OOM exception, thus leads to db disconnection.

OperationalError: (psycopg2.OperationalError) SSL SYSCALL error: EOF detected

Retrying with exponential backoff could help.

Ref:
https://stackoverflow.com/questions/24130305/postgres-ssl-syscall-error-eof-detected-with-python-and-psycopg
https://github.com/psycopg/psycopg2/issues/533
https://dba.stackexchange.com/questions/175085/postgresql-ssl-syscall-error-eof-detected