HitsOpenSearch throws an ArrayIndexOutOfBoundsException

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE
• Fix Version/s: 6.2.X EE
• Component/s: Search Infrastructure, Search Infrastructure > Framework
• Labels:
  • 6.2.x-only
  • ee-ts
  • liferay-fixpack-portal-86-6210
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/12151

LPS-47341 fixed this very same problem for PortalOpenSearchImpl, but left it unsolved for HitsOpenSearchImpl.

Steps to reproduce:

• Start a 6.2.x bundle
• Create a blog entry in the default site. Make sure it contains the word "hello"
• Deploy attached portlet (TestHitsOpenSearch)
• Add TestHitsOpenSearch portlet to the page

Expected result:
Portlet shows the XML with search results

Observed result:
Portlet shows an error message.
Log shows the exception:

Caused by: com.liferay.portal.kernel.search.SearchException: java.lang.ArrayIndexOutOfBoundsException: 0
         at com.liferay.portal.kernel.search.HitsOpenSearchImpl.search(HitsOpenSearchImpl.java:212)
         at org.apache.jsp.view_jsp._jspService(view_jsp.java:265)

Root Cause
Same as LPS-47341

Additional notes
Incidentally, LPS-53730 solved this in master