$print_fail();
echo <<< END
At least one index is invalid. That can happen, e.g. when index creation was
- disrupted and later restarted. You should run the index stage of setup again.
+ disrupted and later restarted. You should delete the affected indices and
+ run the index stage of setup again.
See the question 'Can a stopped/killed import process be resumed?' in the
troubleshooting guide.
Affected indices: