[BUG] dynamic_template throws class_cast_exception #12298
Description
Describe the bug
I trying to use dynamic_templates to map nested objects in a document as flat_object but receive the following error which has something to do with dotted field names:
{
"error": {
"root_cause": [
{
"type": "class_cast_exception",
"reason": "class_cast_exception: class org.opensearch.index.mapper.FlatObjectFieldMapper cannot be cast to class org.opensearch.index.mapper.ObjectMapper (org.opensearch.index.mapper.FlatObjectFieldMapper and org.opensearch.index.mapper.ObjectMapper are in unnamed module of loader 'app')"
}
],
"type": "mapper_parsing_exception",
"reason": "failed to parse",
"caused_by": {
"type": "class_cast_exception",
"reason": "class_cast_exception: class org.opensearch.index.mapper.FlatObjectFieldMapper cannot be cast to class org.opensearch.index.mapper.ObjectMapper (org.opensearch.index.mapper.FlatObjectFieldMapper and org.opensearch.index.mapper.ObjectMapper are in unnamed module of loader 'app')"
}
},
"status": 400
}
Related component
Indexing
To Reproduce
PUT _index_template/test_logs
{
"index_patterns": [
"test*"
],
"template": {
"mappings": {
"dynamic_templates": [
{
"nested_object_fields": {
"match": "*",
"match_mapping_type": "object",
"mapping": {
"type": "flat_object"
}
}
}
]
}
}
}
PUT test_logs/_doc/1
{
"k8s.application.name": "test-app",
"k8s.container.restart_count": "0",
"k8s.namespace.name": "test",
"k8s.pod.name": "test-app-9f45bf4b-v76fr",
"network": {
"ip_address": "10.10.1.10",
"security_group_id": "sg-111111111111111",
"subnet_id": "subnet-111111111111111",
"vpc_id": "vpc-111111111111111"
}
}
Expected behavior
The dotted field names should be mapped as text and nested objects should be mapped as flat_object when indexed.
Additional Details
Plugins
None
Screenshots
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Host/Environment (please complete the following information):
- OS: AWS Opensearch
- Version 2.11
Additional context
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