Source includes triggers MapperParsingException/IllegalStateException if field is in an array #92480
Description
Elasticsearch Version
8.5.3
Installed Plugins
No response
Java Version
bundled
OS Version
n/a
Problem Description
In version 7.x of ES you can set an "includes" settings in the "_source" mapping definition for a field within a nested field.
If you are indexing a document that contains multiple nested fields where one of the fields does not contain a particular field, the document indexes without problems.
However, doing the same in version 8.5.3 fails with a "reason": "Unclosed object or array found".
Steps to Reproduce
Create a mapping like this:
PUT testnested
{
"mappings": {
"_source": {
"includes": [
"doc.field2","doc.field1.field3"
]
},
"properties": {
"doc": {
"properties": {
"field1": {
"type": "nested",
"properties": {
"field1n1": {
"type": "nested",
"properties": {
"name": {
"type": "text"
}
}
},
"field3": {
"type": "text"
}
}
},
"field2": {
"type": "object"
}
}
}
}
}
}
Then index a document like this:
POST testnested/_doc
{
"doc": {
"field1": [
{
"field1n1": [
{
"name": "peter"
},
{
"name": "parker"
}
],
"field3": "test"
},
{
"field4": "testfield3"
}
]
}
}
Receive error:
{
"error": {
"root_cause": [
{
"type": "mapper_parsing_exception",
"reason": "failed to parse"
}
],
"type": "mapper_parsing_exception",
"reason": "failed to parse",
"caused_by": {
"type": "illegal_state_exception",
"reason": "Failed to close the XContentBuilder",
"caused_by": {
"type": "i_o_exception",
"reason": "Unclosed object or array found"
}
}
},
"status": 400
}
Logs (if relevant)
No response