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Forwarded to devs Obsidian on CentOS 7: Deleting a subscription with several domains attached via Plesk API killed Dovecot

burnley

burnley

Regular Pleskian
User name: burnley

TITLE

Obsidian on CentOS 7: Deleting a subscription with several domains attached via Plesk API killed Dovecot

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE

OS CentOS Linux 7.7.1908 (Core)
Product Plesk Obsidian Version 18.0.25 Update #2, last updated on April 8, 2020 09:53 PM

PROBLEM DESCRIPTION

Deleting a hosting with a number of domains & aliases attached caused a service restart storm for Dovecot as well as triggering Postfix services reload. All in under 10 seconds.

Extras from /var/log/maillog
Apr 16 12:03:48 server dovecot: master: Warning: Killed with signal 15 (by pid=21284 uid=0 code=kill)
Apr 16 12:03:51 server dovecot: master: Warning: Killed with signal 15 (by pid=21398 uid=0 code=kill)
Apr 16 12:03:53 server dovecot: master: Warning: Killed with signal 15 (by pid=21469 uid=0 code=kill)
Apr 16 12:03:53 server postfix/smtpd[19826]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:03:53 server postfix/smtpd[20381]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:03:53 server postfix/smtpd[19805]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:03:53 server postfix/smtpd[20311]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:03:55 server dovecot: master: Warning: Killed with signal 15 (by pid=21573 uid=0 code=kill)
Apr 16 12:03:56 server postfix/smtpd[21471]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:03:57 server dovecot: master: Warning: Killed with signal 15 (by pid=21683 uid=0 code=kill)
Apr 16 12:03:59 server dovecot: master: Warning: Killed with signal 15 (by pid=21784 uid=0 code=kill)
Apr 16 12:04:09 server postfix/smtpd[21620]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:04:09 server postfix/smtpd[21690]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:04:09 server postfix/smtpd[21674]: table hash:/var/spool/postfix/plesk/certs(0,lock|fold_fix|src_rhs_is_file) has changed -- restarting
Apr 16 12:04:14 server postfix/smtpd[22019]: table hash:/var/spool/postfix/plesk/vmailbox(0,lock|fold_fix|utf8_request) has changed -- restarting

Extras from /var/log/messages
Apr 16 12:03:48 server systemd: Stopping Dovecot IMAP/POP3 email server...
Apr 16 12:03:51 server systemd: Stopped Dovecot IMAP/POP3 email server.
Apr 16 12:03:51 server systemd: Started Dovecot IMAP/POP3 email server.
Apr 16 12:03:51 server systemd: Stopping Dovecot IMAP/POP3 email server...
Apr 16 12:03:53 server systemd: Stopped Dovecot IMAP/POP3 email server.
Apr 16 12:03:53 server systemd: Started Dovecot IMAP/POP3 email server.
Apr 16 12:03:53 server systemd: Stopping Dovecot IMAP/POP3 email server...
Apr 16 12:03:54 server systemd: Stopped Dovecot IMAP/POP3 email server.
Apr 16 12:03:54 server systemd: Started Dovecot IMAP/POP3 email server.
Apr 16 12:03:55 server systemd: Stopping Dovecot IMAP/POP3 email server...
Apr 16 12:03:56 server systemd: Stopped Dovecot IMAP/POP3 email server.
Apr 16 12:03:56 server systemd: Started Dovecot IMAP/POP3 email server.
Apr 16 12:03:57 server systemd: Stopping Dovecot IMAP/POP3 email server...
Apr 16 12:03:58 server systemd: Stopped Dovecot IMAP/POP3 email server.
Apr 16 12:03:58 server systemd: Started Dovecot IMAP/POP3 email server.
Apr 16 12:03:59 server systemd: Stopping Dovecot IMAP/POP3 email server...
Apr 16 12:04:00 server systemd: Stopped Dovecot IMAP/POP3 email server.
Apr 16 12:04:00 server systemd: start request repeated too quickly for dovecot.service
Apr 16 12:04:00 server systemd: Failed to start Dovecot IMAP/POP3 email server.
Apr 16 12:04:00 server systemd: Unit dovecot.service entered failed state.
Apr 16 12:04:00 server systemd: dovecot.service failed.

STEPS TO REPRODUCE

Couldn't reproduce it yet

ACTUAL RESULT

Dovecot service ends up in failed state because it exceeds the systemd restart threshold.

EXPECTED RESULT

Dovecot isn't left in failed state

ANY ADDITIONAL INFORMATION



YOUR EXPECTATIONS FROM PLESK SERVICE TEAM

Help with sorting out
 
Thank you.
The bug has been confirmed and submitted as PPPM-11862
 
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