A database or content import stopped partway.
WHAT IT MEANS
The import took longer than PHP permits and was terminated.
The database is now partly imported, which is worse than not starting.
THE FIX FOR DATABASE IMPORTS
Use the command line. Feeding a SQL file into the mysql client has no execution limit and is the correct method for anything substantial.
Over SSH, or ask us to run it.
IF YOU HAVE NO SSH
Raise max_execution_time and memory_limit in cPanel, then retry.
Split the SQL file into sections and import them in order.
Use cPanel partial backups rather than phpMyAdmin, which handle larger files.
FOR CONTENT IMPORTS
Most importers process in batches. If yours does not, look for one that does.
Reduce the batch size in the importer's settings where available.
BEFORE RETRYING
Drop the partly imported tables. Importing again over a partial result produces duplicate key errors on every row.
THE UNDERLYING POINT
Web requests are not the right tool for long operations. Use the command line.
