Allow retry when UrlConnectionHttpClient encounters a NullPointerException wrapped in RuntimeException

[jencymaryjoseph]

Motivation and Context

HttpURLConnection can throw a RuntimeException wrapping a NullPointerException (e.g., this.http is null) when the underlying connection fails unexpectedly. The SDK's UrlConnectionHttpClient already handles bare NullPointerException from getResponseCode(), but does not handle the case where the NPE is wrapped in a RuntimeException. This causes the unhandled RuntimeException to propagate up instead of being converted to an IOException, which breaks the SDK's retry logic since retries only trigger on IOException.

Modifications

In UrlConnectionHttpClient, added handling for RuntimeException with an NPE cause in three places:

• getResponseCode() — wraps it as IOException
• getAndHandle100Bug() (covers getOutputStream()/getInputStream()) — wraps it as UncheckedIOException

Testing

Added unit tests in UrlConnectionHttpClientWithCustomCreateWireMockTest that simulate RuntimeException(NullPointerException) from getResponseCode(), getOutputStream(), and getInputStream(), verifying they are wrapped as IOException/UncheckedIOException

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING document
• Local run of mvn install succeeds
• My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed
• I have added a changelog entry. Adding a new entry must be accomplished by running the scripts/new-change script and following the instructions. Commit the new file created by the script in .changes/next-release with your changes.
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• I confirm that this pull request can be released under the Apache 2 license

[dagnir]

Since "handle" is a vague term, we can replace it with something more specific like "treat as IOException to allow a retry" or something like that

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

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