Unable to send warning e-mails about subscriptions during upgrade from 3.7.2 to 3.13.

Upgrading from 3.7.2 and before may produce the following error messages.

2008-11-11 20:54:24,553 http-8090-Processor3 INFO [jira.upgrade.tasks.UpgradeTask_Build232] Lossy subscription converted for user [ccho]. No matching searchrequest could be found. No e-mail will be sent to user. Please run the Integrity checker 'Check for invalid subscriptions'

This can mean one of two things:

1. The database indeed does not have the associated SearchRequest (good).
2. The subscription is to a shared, but valid filter. This is wrong.

The UpgradeTask_Build232 uses the SearchRequestService.getFilter(ctx, filterId) method. This method return null for valid shared filters until after UpgradeTask_Build319 runs.

I believe the upgrade of the subscription works, its just the notification e-mail that fails.