Some Plesk functions are always stuck. IP managing or domain reconfiguration hang

Symptoms

• Some Plesk functions do not work, E.G:

  • Unable to manage IP addresses in Plesk > Tools & Settings > IP Addresses, tasks are always stuck.

  • The extensions updates in Plesk > Extensions > My extensions hang.

  • Migration is slow or stuck.

  • Attempt to install extensions via CLI fail:

    # plesk bin extension -i extension_name

  • Manual domain reconfiguration via command below is stuck:

    # /usr/local/psa/admin/bin/httpdmng –reconfigure-domain example.com

• Newly created domains have no webserver configuration files (*.conf) in /var/www/vhosts/system/example.com/conf/ and shows Web Server’s Default Page.

• Strace of the hung processes shows repetitive messages:

  # ps -auxfww | grep httpdmng

  …
  root 15248 0.0 1.4 305228 30672 ? S Jun19 0:28 /usr/bin/sw-engine -c /opt/psa/admin/conf/php.ini /opt/psa/admin/sbin/httpdmng –reconfigure-batch /opt/psa/tmp/apbZYMh2G

  # strace -p 15248

  …
  open(“/run/lock/lmlib/container_locks/plesk.0/global/service/sysuser/web.lock”, O_RDWR) = 11
  …
  futex(0x7f9fe5c0322c, FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, 152997, {1529514190, 328613000}, ffffffff) = -1 ETIMEDOUT (Connection timed out)

• Lock files are always presented and never released:

  # find /var/run/lock/lmlib/container_locks -name “*.lock”

  /var/run/lock/lmlib/container_locks/plesk.0/global/service/ip.lock
  /var/run/lock/lmlib/container_locks/plesk.0/global/service/sysuser/web.lock
  /var/run/lock/lmlib/container_locks/plesk.0/global/service/sysuser.lock
  /var/run/lock/lmlib/container_locks/plesk.0/global/service.lock
  /var/run/lock/lmlib/container_locks/plesk.0/global.lock
  /var/run/lock/lmlib/container_locks/plesk.0.lock

Cause

Resolution

Workaround

If update is not possible for some reason you may try the following