Unable to start migration from cPanel to Plesk: Error creating migration dump

Symptoms

• Migration from cPanel to Plesk server fails with following error message in Plesk GUI:

  PLESK_ERROR: Failed to perform action: Fetch data from source cPanel
  Cause: Error creating migration dump: Command execution failed on the source server ‘cpanel’ (203.0.113.2) with non-zero exit code.
  command: cd /root/plesk_migrator/plesk_migrator-57zza0a6g4hap8msesqs1qwe4dnntffj/pmm_agent; /usr/bin/perl createDump.pl –dump-all –configuration-only –server -v 5 > dump.log 2>&1
  exit code: 2
  stdout:
  stderr:
  That is a critical error, migration was stopped.

• Checking migration agent log file located in /usr/local/psa/var/modules/panel-migrator/sessions/<session-date>/pmm-agent.<session-date>/configuration-dump.log provides more details:

  # cat /usr/local/psa/var/modules/panel-migrator/sessions/20180927224353/pmm-agent.2018.09.27.22.43.54/configuration-dump.log
  Can’t locate JSON/PP.pm in @INC (@INC contains: . /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at Dumper.pm line 19.
  BEGIN failed–compilation aborted at Dumper.pm line 19.
  …

• Package Perl-JSON-PP package is missing in cPanel source server:

  # rpm -qa | egrep -i perl-JSON-PP
  (Empty Output)

Cause

Required Perl-JSON-PP package is not installed in cPanel source server.

Resolution

1. Connect to cPanel source server via SSH
2. Install Perl-JSON-PP package on cPanel source server:

   # yum install perl-JSON-PP

3. Finish the current migration session on the target server and start new migration.