Seems all process blocked by a system service "fapolicy.d", when I stop the service, defunct process got disappeared and pending backends got released or moving on, and database started to accept new connection again. This fapolicy.d in RHEL8.4 is enabled by system admin to support security compliance requirements. systemctl stop fapolicyd , after that, everything go back to be normal soon.
Regards, James -----Original Message----- From: James Pang (chaolpan) Sent: Monday, May 30, 2022 11:00 AM To: Tom Lane <[email protected]> Cc: Justin Pryzby <[email protected]>; [email protected] Subject: RE: postgres backend process hang on " D " state Maybe any bugs from these extensions ? I can try that removing all extensions, but we need these extensions. Thanks, James -----Original Message----- From: Tom Lane <[email protected]> Sent: Monday, May 30, 2022 10:21 AM To: James Pang (chaolpan) <[email protected]> Cc: Justin Pryzby <[email protected]>; [email protected] Subject: Re: postgres backend process hang on " D " state "James Pang (chaolpan)" <[email protected]> writes: > 1. extensions > shared_preload_libraries = > 'orafce,pgaudit,pg_cron,pg_stat_statements,set_user' Can you still reproduce this if you remove all of those? regards, tom lane
