Symptoms
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On a server that runs Plesk Obsidian version 18.0.41, the backup process upload to remote FTP can be stuck indefinitely (since Plesk update to 18.0.41), while it keeps spawning a lot of
backupmngprocesses -
Messages that are similar to the following can be found in the backup logs at
/var/log/plesk/PMM/backup-YYYY-MM-DD-hh-mm-ss-ms:INFO: TransportError Transport error: unable to check directory existence: Curl error: (7) Couldn't connect to server: Last FTP request: Last FTP response: [common/plesk-utils/PMM/repository-transport/transport.cpp:TransportError]
virtual bool plesk::tRepositoryFtp::IsDirExist(const string&)
INFO: pmm-ras finished. Exit code: 125
INFO: The utility succesfully executed.
INFO: Curl error: (28) Timeout was reached: Last FTP request: STOR backup_2202161157.tar: Last FTP response: 150 Opening BINARY mode data connection for backup_2202161157.tar
INFO: Unable to resume upload. Have got 550 error code from FTP server
INFO: Cancel export
INFO: Data sending interrupted, because of lost connection to FTP
INFO: Error occured while writing archive to FTP Curl error: Unable to resume an interrupted upload: (25) Upload failed (at start/before it took off): Last FTP request: STOR backup_2202200441.tar: Last FTP response: 550 backup_2202200441.tar: Disc quota exceeded: Connection to the FTP server has lost
Cause
This behavior was caused by a product issue:
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#PPPM-13411 "Scheduled backup processes no longer get stuck indefinitely when backing up to FTP storage if the configured FTP server is unavailable or if the provided credentials do not match."
Fixed in:
Resolution
How to update Plesk Obsidian to the latest build?
Workaround
If updating Plesk to the latest build is not possible for some reason, you may execute the following workaround:
Connect to the Plesk server via SSH
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Stop the
cronserviceOn Debian/Ubuntu:
# systemctl stop cron
On CentOS/RHEL/CloudLinux:
# systemctl stop crond
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Kill the stuck backup processes by using their PID:
# kill -9 `ps auxfw | grep -i pmm | grep -v grep | awk {'print $2'}`
# kill -9 `ps auxfw | grep -i backup | grep -v grep | awk {'print $2'}`
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Start the
cronserviceOn Debian/Ubuntu:
# systemctl stop cron
On CentOS/RHEL/CloudLinux:
# systemctl stop crond
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Either wait until the next scheduled backup is launched or launch the process manually through the following command:
# /opt/psa/admin/sbin/backupmng
Warning: If the tasks are launched manually through the command above, all the pending scheduled backups will be launched at the same time. Consider this for resource usage.