I have a question about Elasticsearch.
If I have 2 indices IndexA and IndexB.
I put document docA with id "1" in IndexA, and I put document docB with id "1" in IndexB. The documents are of same doc type but different body (same structure but different values).
What will happen if I create an alias "alias1" which points to both IndexA and IndexB and do a get request of the following?
response = es_client.get(index="alias1", doc_type="doc_type", id="1")
It is very easy to test, but in short you cannot issue a GET for a document using and alias that points to more than one index !
PUT index1/doc/1
{ "test": 1 }
PUT index2/doc/1
{ "test": 2 }
POST _aliases
{
"actions" : [
{ "add" : { "index" : "index1", "alias" : "alias1" } },
{ "add" : { "index" : "index2", "alias" : "alias1" } }
]
}
GET alias1/doc/1
=>
{
"error": {
"root_cause": [
{
"type": "illegal_argument_exception",
"reason": "Alias [alias1] has more than one indices associated with it [[index2, index1]], can't execute a single index op"
}
],
"type": "illegal_argument_exception",
"reason": "Alias [alias1] has more than one indices associated with it [[index2, index1]], can't execute a single index op"
},
"status": 400
}
