We recently updated Hibernate Search from 5.10.5 to 5.11.0/1. During the last update of our application, we altered index mappings and dropped the index. On startup, the index was created and re-indexing worked as expected. But executing any search for a tenant with a hyphen ("-") in its name returns no results.

What we're seeing is that Hibernate 5.10.5 generates the field __HSearch_TenantId like this:

...
"properties": {
  "__HSearch_TenantId": {
    "type": "keyword"
  },
...

while beginning from Hibernate Search 5.11.0, index definition is as follows:

...
"properties": {
  "__HSearch_TenantId": {
    "type": "text",
    "fields": {
      "keyword": {
        "type": "keyword",
        "ignore_above": 256
      }
    }
  },
...

The query executed by Hibernate Search looks like this

...
"filter": [
  {
    "term": {
      "__HSearch_TenantId": "foo-bar"
    }
  },
...

and will never return any result.

In our opinion, either the index definition of field __HSearch_TenantId has to be reverted to the original behaviour, or the generated filter query by the FullTextEntityManager should use the keyword field.