I am having a problem with ElasticSearch 7.9.1 which seems to be caused by
Lucene 8.6.2. If I perform a search with >288 filter terms using the
unified highlighter I get a too_complex_to_determinize_exception error but
if I switch to the plain highlighter it works fine. Is this a bug or am I
doing something wrong?
This throws the error
```
{
"highlight": {
"type": "unified",
"fields": {
"title": {
"require_field_match": false
}
}
},
"query": {
"bool": {
"must": [{
"query_string": {
"query": "*"
}
}],
"filter": [{
"bool": {
"must": [{
"terms": {
"id": [ ">288 terms here" ]
}
}]
}
}]
}
}
}
```
But this works fine
```
{
"highlight": {
"type": "plain",
"fields": {
"title": {
"require_field_match": false
}
}
},
"query": {
"bool": {
"must": [{
"query_string": {
"query": "*"
}
}],
"filter": [{
"bool": {
"must": [{
"terms": {
"id": [ ">288 terms here" ]
}
}]
}
}]
}
}
}
```
Or if I adjust the search to use the copy_to field it works as well (note
"id" is now "_id")
```
{
"highlight": {
"type": "unified",
"fields": {
"title": {
"require_field_match": false
}
}
},
"query": {
"bool": {
"must": [{
"query_string": {
"query": "*"
}
}],
"filter": [{
"bool": {
"must": [{
"terms": {
"_id": [ ">288 terms here" ]
}
}]
}
}]
}
}
}
```
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