percolator registered on an alias is never triggered

[iksnalybok]

Actually, adding a percolator is always successful, regardless whether the targeted index exists or not. Currently, the targeted index should be a real index, and cannot be an alias. I don't know if this is the wanted behavior, but it's confused me; the percolate documentation is silent about this use case.

To reproduce:

# Create an index (idx), and an alias pointing to it (idxAlias).
curl -XPUT localhost:9200/idx
curl -XPOST localhost:9200/_aliases -d ' { "actions" : [ { "add" : { "index" : "idx", "alias" : "idxAlias" } } ] }'

# Create a percolator on the index it-self.
# Percolating a document via the index or the alias works in both cases. This is fine.
curl -XPUT localhost:9200/_percolator/idx/kuku -d '{ "query" : { "term" : { "field1" : "value1" } } }'
curl -XGET localhost:9200/idx/type1/_percolate -d '{ "doc" : { "field1" : "value1" } }'
    ~> {"ok":true,"matches":["kuku"]}
curl -XGET localhost:9200/idxAlias/type1/_percolate -d '{ "doc" : { "field1" : "value1" } }'
    ~> {"ok":true,"matches":["kuku"]}

# Create a percolator on the alias.
# Percolating a document via the index or the alias fails in both cases.
curl -XPUT localhost:9200/_percolator/idxAlias/kiki -d '{ "query" : { "term" : { "field2" : "value2" } } }'
    ~> {"ok":true,"_index":"_percolator","_type":"idxAlias","_id":"kiki","_version":1}
curl -XGET localhost:9200/idx/type1/_percolate -d '{ "doc" : { "field2" : "value2" } }'
    ~> {"ok":true,"matches":[]}
curl -XGET localhost:9200/idxAlias/type1/_percolate -d '{ "doc" : { "field2" : "value2" } }'
    ~> {"ok":true,"matches":[]}

[julianhille]

This is a very heavy issue for me, cause im relying on percolator and aliases.

• Percolators will be created with the name of the alias as a type.
• Percolators querying will be with the real index name.

[martijnvg]

The percolate api just doesn't support resolving aliases. The redesigned percolate api does support resolving aliases to concrete indices.

[martijnvg]

Now fully supported via #3420