What is the "Search was cancelled" message?

Jira stops a search at 1000 results and the app reports it. Narrow the filter, or raise the Jira search limit to change it.

When the Agile Tools & Filters for Jira Software search returns more results, the following message will be displayed:

There are two possible ways to fix this: 

• Narrow your search criteria to limit search results.

• The maximum search limit is defined by the jira.search.views.default.max property.
  Contact your Jira administrator to increase it.