spring data elasticsearch can't deserialize "single or array" object field

[puppylpg]

The problem is posted here at first time.

Here is the repo i created by spring boot to reproduce it:

1. start a elasticsearch of version 7.12, maybe with docker - docker run --name es01-test --net elastic -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms1024m -Xmx1024m" docker.elastic.co/elasticsearch/elasticsearch:7.12.1;
2. see resources/insert.txt: add 4 docs manually;
3. just click and run the project(or through maven: mvn clean spring-boot:run);

Errors will be logged into logs/log.

I'll also try to sovle it(if free this weekend, not guaranteed :D)

Thanks for your efforts.

[sothawo]

Interesting finding while working on this: Your one-hobby case only works because Lombok is providing an all-args constructor. Using a normal POJO it fails.

Glad I removed all that lombok stuff over a year ago

[sothawo]

Implemented in main and backported to 4.4.x and 4.3.x.

[rishiraj88]

@sothawo , please give me a resource link to read how backporting is implemented.

[sothawo]

check the branches 4.4.x and 4.3.x