Troubleshooting Migration Issues

Possible Issues on Windows Systems

If the migration manager shows the error message Network connection failed. Cannot connect to Plesk Migration Agent on the remote host, it means that a machine or network configuration causes connectivity problems between the migration manager and migration agent.

If you encounter this issue, do the following:

1. Stop migration.
2. Check the IP address key value in the migration agent configuration file WINAgentMng.exe.config.
   • If the key is not specified, or is set to 0.0.0.0, specify a valid IP address for the key, and do the following:
   1. Start migration. On the Remote Host Connection Setup screen, type the IP address specified in the IP address key in the WINAgentMng.exe.config file into the Source host field under Remote host connection settings.
   2. Proceed with migration as described in the chapter Performing Migration.
   • If a specific IP address is set for the IP address key in the WINAgentMng.exe.config file, make sure that it is a valid address and that it is the same as the address entered in Source host field on the Remote Host Connection Setup screen during migration setup. If it is different, either set the value of the key to "0.0.0.0" or remove the key from the WINAgentMng.exe.config file altogether.

If Plesk Migration Manager is installed behind a NAT and you experience this problem, it cannot be resolved in such a way. You should get both servers to connect without the NAT between them and enable the migration.

Possible Issues on Linux/Unix Systems

If you are migrating data by means of command-line backup and restore utilities, restoration mail fail with the following error: Unable to resolve all conflicts. This can happen when some settings or services on the destination server are not configured, and for this reason, migration is impossible.

For example, a website on the source server used PostgreSQL databases, but on the destination server, PostgreSQL database server is not installed or configured.

You can learn about the unresolved conflicts in the log located in the file /usr/local/psa/PMM/rsessions/YYYYMMDDhhmmnnnnn/conflict_description, where YYYYMMDDhhmmnnnnn is the directory name consisting of date and time when migration or restoration was performed (the YYYYMMDDhhmm part) and a randomly generated number (the nnnnn part).

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