• Article Type: General
• Product: Primo
• Product Version: 4.8

Problem Symptoms:

Local Search Engine Blending settings ('Minimum hit rank for combining:'='Medium') not working in SP4.8.0, no results returned

* Using a 'blended' search scope (at least one local scope + Primo Central adaptor, may also include EBSCO adaptor, etc)

* 'Minimum hit rank for combining:' is set to 'Medium' for 'Local Search Engine' in Back Office> Advanced> Search Engine Configuration> Blending

* The following error may be observed in library_server.log (SSH access to FE server is required to see this):
ERROR [t-Thread-579] [c-Cache] - The record cashing failed in blended search.
java.lang.NullPointerException
at com.exlibris.primo.server.blender.ForceBlendingParameters.init(ForceBlendingParameters.java:81)
at com.exlibris.primo.server.blender.ForceBlendingParameters.getParameters(ForceBlendingParameters.java:105)
at com.exlibris.primo.server.blender.caching.Cache.put(Cache.java:152)
at com.exlibris.primo.server.blender.BlendedSearchEnginesImpl.search(BlendedSearchEnginesImpl.java:151)
at com.exlibris.primo.server.searchManager.SearchManagerImpl.search(SearchManagerImpl.java:53)
at com.exlibris.primo.api.searchManager.SearchManagerBean.search(SearchManagerBean.java:41)
at com.exlibris.primo.srvinterface.PrimoSearch.search(PrimoSearch.java:244)
at com.exlibris.primo.srvinterface.PrimoSearch.search(PrimoSearch.java:200)
at com.exlibris.primo.search.parallelSearch.PrimarySearchRunnable.performSearch(PrimarySearchRunnable.java:46)
at com.exlibris.primo.search.parallelSearch.SearchRunnable.run(SearchRunnable.java:44)
at java.lang.Thread.run(Thread.java:662)

Cause:
defect

Resolution:
Fixed in version 4.9

The instructions given here will function as a workaround:
1. Navigate to Back Office> Advanced> Search Engine Configuration> Blending
2. Adjust settings for 'Local Search Engine' as follows:
Minimum hit rank for combining: Low
Combine Location: Top
Number of Results to reward: 5
Constant factor: 2.0

3. Adjust settings for 'Primo Central' as follows:
Minimum hit rank for combining: High
Combine Location: Bottom
Number of Results to reward: 5
Constant factor: 1.0

4. Save and Deploy Search Engine Configuration

Category: Search Engine - Primo

Subject: Configuration - Primo

• Article last edited: 18-May-2017