Plesk upgrade fails: unpacking of archive failed on file : cpio: open

Symptoms

1. Plesk upgrade fails:

   PLESK_ERROR: Error unpacking rpm package plesk-core-17.5.3-cos7.build1705170317.16.x86_64
   plesk-core-12.5.30-cos7.build1205150826.19.x86_64 was supposed to be removed but is not!

2. Errors in /tmp/autoinstaller3.log:

   CONFIG_TEXT: error: unpacking of archive failed on file /etc/cron.monthly/50plesk-monthly;5a095bb2: cpio: open

3. The following permissions are set to the file mentioned in the error:

   # lsattr /etc/cron.monthly/50plesk-monthly
   ----i--------e-- /etc/cron.monthly/50plesk-monthly

Cause

Immutable bit restricts access to the file.

Resolution

1. Connect to Plesk server using SSH;
2. Remove immutable attribute from required file or directory, i.e.:
   

   # chattr -i /etc/cron.monthly/50plesk-monthly

   If it is needed to remove immutable flag from all files, for example, in /usr/bin/ directory:

   # lsattr /usr/bin/* | grep "\\-\\i\\-" | awk '{print $2}' | while read d; do chattr -i $d;done

Additional information

Plesk upgrade failed with error: cpio: rename failed - Operation not permitted