I am trying to migrate my CCK types to Fields using CCK module in D7, using content_migrate, following the documentation. After migrating all fields of a certain content types, I got a server reset when trying to view any node of this content type.
See also https://www.drupal.org/node/2665208
In Chrome the message is "No data received ERR_EMPTY_RESPONSE", Firefox says "Secure Connection Failed The connection to the server was reset while the page was loading". The server log is completely empty for loading this page, so I guess php dies pretty early.
I migrated all fields one by one and tracked it down to a text field that was using an optionwidgets_button widget in D6.
Edit: We found a second broken field. This field does not cause a server reset but a 'The website encountered an unexpected error' from Drupal upon display of any node where this field is set. This field is of type user_reference.
This is the output of from the migration process of the offending field:
- Changed field type: The 'field_myfield' field uses a 'optionwidgets_buttons' widget. The field type will be changed from 'text' to 'list_text'.
Rolling back the field suppresses the error; re-migrating this field fully reproduces the error.
no pending dbupdates, Postgres 8.4, PHP 5.3