我们正在使用PostgreSQL 9.2版本。使用pg_dump备份数据库时，我们面临以下错误。
请指导我如何纠正此问题。
pg_dump: [archiver (db)] query was: COPY public.aclappliedtopep (id, instance_version, direction, aclname, ifname, owningentityid, protocolendpoint_id, deploypending, authentityid, authentityclass, accesscontrollist_id) TO stdout;
pg_dump: FATAL: terminating connection due to administrator command
pg_dump: [archiver (db)] query failed: server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
pg_dump: [archiver (db)] query was: COPY public.aclappliedtopep (id, instance_version, direction, aclname, ifname, owningentityid, protocolendpoint_id, deploypending, authentityid, authentityclass, accesscontrollist_id) TO stdout;
pg_dump: [archiver (db)] connection to database "qovr" failed: could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5433?
pg_dump: error reading large object 69417845: FATAL: terminating connection due to administrator command
FATAL: terminating connection due to administrator command
pg_dump: could not open large object 59087743: FATAL: terminating connection due to administrator command
FATAL: terminating connection due to administrator command