class file has wrong version 55.0, should be 52.0

[opariha]

we are using java 8 to run on local

Error Showing

java: cannot access org.opensearch.client.opensearch.OpenSearchClient
bad class file: .../org/opensearch/client/opensearch-java/2.1.0/opensearch-java-2.1.0.jar!/org/opensearch/client/opensearch/OpenSearchClient.class
class file has wrong version 55.0, should be 52.0
Please remove or make sure it appears in the correct subdirectory of the classpath.

[lizsnyder]

@opariha can you please share the file you're referring to?

[opariha]

hi @lizsnyder
PFA

OpenSearchClient java File

OpenSearchClient.zip

OpenSearch Jar which is used by us

opensearch-java-2.1.0.zip

[lizsnyder]

@opariha you opened this issue in the developer guide repository. What documentation page are you referring to / leaving feedback on?

[opariha]

@lizsnyder we are referring to this document page- https://docs.aws.amazon.com/opensearch-service/latest/developerguide/request-signing.html
and https://github.com/awsdocs/amazon-opensearch-service-developer-guide/tree/master/sample_code/java/opensearch-java-aws-sdk2-transport repository

[lizsnyder]

@dblock @arunx2 FYI, can you please have a look at this?

For reference: #63

[dblock]

opensearch-java 2.x requires Java 11+, see opensearch-project/opensearch-java#156

So this issue is “by design” and we need to document it, and unfortunately there’s no quick fix to re-add Java 8 support :(