Applicable to:
- Plesk for Linux
- Plesk for Windows
Symptoms
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When clicking on Updates and Upgrades in Plesk, the page prompts for a root password or does not open at all with one of the following error messages in a web-browser:
The connection has timed out
This site can’t be reached
ERR_TIMED_OUT
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When starting Plesk Installer in a command-line interface, the following message is shown:
BUSY: Update operation was locked by another update process.
Error: Unable to start Plesk Installer. The following error has occurred: Installation could not be started: another installation procedure is currently running.
Cause
A Plesk Installer process is running on the server already, but only one Plesk Installer process can be launched at a time.
Resolution
Terminate active Plesk Installer processes:
Note: Before applying the solution below, make sure that other users on the Plesk server are not using Plesk Installer.
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Connect to the Plesk server via SSH (Linux) / RDP (Windows Server)
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Stop Plesk Installer processes (on Windows Server, use a command prompt as Administrator):
# plesk installer stop
For Plesk Onyx, apply the following steps:
-
Connect to the Plesk server via SSH
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Find the PIDs of Plesk Installer processes:
# ps aux | grep install | grep -v grep
root 12345 1.5 0.8 136856 18280 ? S 20:43 0:00 /var/cache/parallels_installer/parallels_installer_CentOS_7_x86_64_3.21.3 --service-mode --enable-xml-output --ssl-cert /usr/local/psa/admin/conf/httpsd.pem --branch release,stable --web-interface --with-ssl --disable-browser
root 12346 0.0 0.1 109776 2808 ? S 20:43 0:00 /var/cache/parallels_installer/parallels_installer_CentOS_7_x86_64_3.21.3 --service-mode --enable-xml-output --ssl-cert /usr/local/psa/admin/conf/httpsd.pem --branch release,stable --web-interface --with-ssl --disable-browser -
Kill found processes using the command below. Replace 12345 12346 with actual PIDs from the step above:
# kill -9 12345 12346
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Remove the
/tmp/psa-installer.lock
file, if it exists -
Start Plesk Installer
Apply one of the following solutions:
-
Terminate Plesk Installer processes using a command prompt:
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Connect to the Plesk server via RDP
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Start a command prompt
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Find the PID of a Plesk Installer process:
wmic process where "caption like '%installer%'" get processId,caption
Caption ProcessId
parallels_installer_Microsoft_10.0_x86_64_3.22.12.exe **6444
**Caption ProcessIdai.exe 6444 -
Kill the process using its PID:
taskkill /PID 6444 /F
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Kill the
ai.exe
process:taskkill /FI "IMAGENAME eq ai.exe" /F
-
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Terminate Plesk Installer processes using Windows Task Manager
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Open Task Manager (Open Windows Start > type "Task Manager")
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Right-click on each existing "Plesk Installer" process and click End Task:
Note: Plesk Installer processes can have one of the following names depending on Plesk version: Plesk Installer, ai.exe, parallels-installer.exe or plesk-installer.exe.
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