使用elasticsearch在django-haystack中执行rebuild_index时的MapperParsingException

Question

I'm using java 1.7.0_95 , Django 1.8.4 , Python 3.4.0 , Django Rest Framework 3.1.3 , ElasticSearch 2.3.1 , pyelasticsearch 1.4 and Django Haystack 2.4.1

I'm experiencing an error in elasticsearch every time I try to do python manage.py rebuild_index . This is the error:

MapperParsingException[Root mapping definition has unsupported parameters:  [_boost : {null_value=1.0, name=boost}]]
        at org.elasticsearch.index.mapper.DocumentMapperParser.checkNoRemainingFields(DocumentMapperParser.java:171)
        at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:159)
        at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:99)
        at org.elasticsearch.index.mapper.MapperService.parse(MapperService.java:498)
        at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.applyRequest(MetaDataMappingService.java:257)
        at org.elasticsearch.cluster.metadata.MetaDataMappingService$PutMappingExecutor.execute(MetaDataMappingService.java:230)
        at org.elasticsearch.cluster.service.InternalClusterService.runTasksForExecutor(InternalClusterService.java:468)
        at org.elasticsearch.cluster.service.InternalClusterService$UpdateTask.run(InternalClusterService.java:772)
        at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:231)
        at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:194)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)

Here is my configuration:

HAYSTACK_CONNECTIONS = {
    'default': {
        'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
        'URL': 'http://127.0.0.1:9200/',
        'INDEX_NAME': 'haystack',
    },
}

HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'

HAYSTACK_SEARCH_RESULTS_PER_PAGE = 40

Answer 1

There is a relevant django-haystack issue to remove the boost parameter which is no longer supported in ElasticSearch >= 2:

• Remove boost which is now unsupported

Before that change, django-haystack was using the _boost parameter in the mapping for the ElasticSearch backend. The change was made to the master branch. You can do things at this moment:

• install the development version of django-haystack directly from github:

   pip install -e git+https://github.com/toastdriven/django-haystack.git@master#egg=django-haystack 

• downgrade ElasticSearch to the latest stable version before the upgrade to the 2nd, I think it is 1.7.3

Also, here is the relevant discussion:

• Django haystack LocationField created as string instead of geo_point in elasticsearch