Mayank Jha Mayank Jha - 1 month ago 14
Python Question

How to check if an index exists in elasticsearch using a python script and perform exception handling over it?

How do I check whether an index exists or not using a python query?

I'm passing my index as a variable assigned outside the query as :-

i=int(datetime.datetime.now().strftime('%d'))+1
indextring="index"
for m in range (i-10,i):
d = datetime.datetime(2016, 10, m, 18, 00).strftime('%Y-%m-%d')
index1=datestring+d
subfix="_"+datetime.datetime(2016, 10, m, 18, 00).strftime('%Y-%m-%d')
es=Elasticsearch(['localhost:9200'])
res = **es.search(index='{0}'.format(index1)**, doc_type="log",size=10000, from_=0, body={ "query": {
"match": {
....Match condition follows
}
}
}})


Now, some of the index are not present for a particular date, however I want the process to run irrespective of that. I'm getting the following error when the index is not present-->

elasticsearch.exceptions.NotFoundError: TransportError(404, u'index_not_found_exception')

I'm not sure how the exception handling works in elasticsearch.

Answer

You have to call it on indices. Currently you are using exists of search class which tells you whether given document exists in the index and not the index itself.

Try this code

if es.indices.exists(index="index"):
    Your code for search

There are also more options if you want to use.