Issue Summary

Using basic search or text with a single term in a Japanese Lucene JQL search returns only issues that include the term in all text fields

Steps to Reproduce

1. Ensure Jira is using Lucene as the search platform
2. In General Configuration, edit the Indexing language to Chinese/Japanese/Korean
3. Create one issue with the summary "検索" and description "したい"
4. In basic mode, search for 検索
5. Or in advanced mode search for "text ~ 検索"

Expected Results

JQL search return one issue

Actual Results

No issue is returned.

This is because the JQL is attempting to match the term in every text field using AND instead of OR

Workaround

A workaround is to search against a single field. e.g. instead of searching "text ~ 検索", search for "summary ~ 検索".

A limited workaround is to search for more than one bigram (for example 検索したい instead of 検索).