fix: Use json file extension for log files

CHANGELOG.md

@@ -11,7 +11,13 @@ All notable changes to this project will be documented in this file.
     (or via `--rolling-logs <DIRECTORY>`).
   - Replace stackable-operator `print_startup_string` with `tracing::info!` with fields.
 
+
+### Fixed
+
+- Use `json` file extension for log files ([#553]).
+
 [#547]: https://github.com/stackabletech/spark-k8s-operator/pull/547
+[#553]: https://github.com/stackabletech/spark-k8s-operator/pull/553
 
 ## [25.3.0] - 2025-03-21
 

rust/operator-binary/src/main.rs

@@ -102,7 +102,7 @@ async fn main() -> anyhow::Result<()> {
                     Settings::builder()
                         .with_environment_variable(ENV_VAR_CONSOLE_LOG)
                         .with_default_level(LevelFilter::INFO)
-                        .file_log_settings_builder(log_directory, "tracing-rs.log")
+                        .file_log_settings_builder(log_directory, "tracing-rs.json")
                         .with_rotation_period(rotation_period)
                         .build()
                 }))