SOLR-18066: Fix hideIgnoreStackTrace from the solr.xml

[utsav00]

https://issues.apache.org/jira/browse/SOLR-18066

Description

Solr has a hideStackTrace setting in solr.xml that's meant to strip Java stack traces from HTTP error responses,

The setting was being respected for core-level endpoints but completely ignored for coreless endpoints like logging/levels that aren't tied to any specific Solr index.

Solution

The fix adds a two-tier fallback:

1. If there's a core -> read hideStackTrace from it (existing)
2. If there's no core -> fall back to the CoreContainer directly from the request context

Tests

After building, fetch a coreless point -

curl -s -X PUT http://localhost:8983/api/node/logging/levels \
  -H "Content-Type: application/json" \
  -d '{"logger": "org.apache.solr", "level": "DEBUG"}' | python3 -m json.tool

Same endpoint after toggling hideStackTrace in the solr.xml in the build folder

The response after the fix and turning the respective config true -

{
    "responseHeader": {
        "status": 500,
        "QTime": 159
    },
    "error": {
        "code": 500,
        "errorClass": "com.fasterxml.jackson.databind.exc.MismatchedInputException",
        "msg": "Cannot deserialize value of type `java.util.ArrayList<org.apache.solr.client.api.model.LogLevelChange>` from Object value (token `JsonToken.START_OBJECT`)\n at [Source: REDACTED (`StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION` disabled); line: 1, column: 1]"
    }
}

No trace in the response body

Checklist

Please review the following and check all that apply:

• I have reviewed the guidelines for How to Contribute and my code conforms to the standards described there to the best of my ability.
• I have created a Jira issue and added the issue ID to my pull request title.
• I have given Solr maintainers access to contribute to my PR branch. (optional but recommended, not available for branches on forks living under an organisation)
• I have developed this patch against the main branch.
• I have run ./gradlew check.
• I have added tests for my changes.
• I have added documentation for the Reference Guide (nothing to do I believe)
• I have added a changelog entry for my change

[igiguere]

+1 for me.

Good catch, and thank you! I remember woking on the ticket to hide stack traces, I should probably have paid attention to that when wroking on JAX-RS resources.

[utsav00]

Was happy to work on this, @igiguere!

This is a dumb question but I am not able to find an option to rerun the workflow - doesn't seem to be failing due to the changes on this PR. Can you please help retrigger the workflow run?

[epugh]

I have retriggered the solr tests