fix(NA): MaxListenersExceededWarning on getLoggerStream (#57133) (#57257

)

* fix(NA): possible EventEmitter memory leak detected with a passthrough for getLoggerStream

* chore(na): remove passthrough

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

src/legacy/server/logging/log_reporter.js

@@ -24,6 +24,14 @@ import LogFormatJson from './log_format_json';
 import LogFormatString from './log_format_string';
 import { LogInterceptor } from './log_interceptor';
 
+// NOTE: legacy logger creates a new stream for each new access
+// In https://github.com/elastic/kibana/pull/55937 we reach the max listeners
+// default limit of 10 for process.stdout which starts a long warning/error
+// thrown every time we start the server.
+// In order to keep using the legacy logger until we remove it I'm just adding
+// a new hard limit here.
+process.stdout.setMaxListeners(15);
+
 export function getLoggerStream({ events, config }) {
   const squeeze = new Squeeze(events);
   const format = config.json ? new LogFormatJson(config) : new LogFormatString(config);