Azure Monitor Exporter: log exporter produces unparseable message content for complex body types

[lmolkova]

Sample code:

var azmon = new AzureMonitorExporterBuilder()
        .connectionString(...)
        .buildLogRecordExporter();
var logProvider = SdkLoggerProvider.builder()
        .addLogRecordProcessor(SimpleLogRecordProcessor.create(OtlpGrpcLogRecordExporter.getDefault()))
        .addLogRecordProcessor(SimpleLogRecordProcessor.create(azmon))
        .build();
EventLoggerProvider eventLoggerProvider = SdkEventLoggerProvider.create(logProvider);
var logger = eventLoggerProvider.get("test-logger");
var event = new GenAIChoice()
        .setId(1)
        .setFinishReasons(new String[]{"stop", "length"})
        .setMessage(new GenAIMessage().setContent("test content"));
logger.builder("test-event")
        .put("id", Value.of(event.getId()))
        .put("finishReasons", Value.of(Arrays.stream(event.getFinishReasons()).map(Value::of).toArray(Value[]::new)))
        .put("message", event.getMessage().toValue())
        .emit();

AppInsights:

Aspire:

It's effectively impossible to parse what the exporter produces. It should produce valid json since KQL provides extensive support for it making it easy to parse and query corresponding content.

[lmolkova]

/cc @heyams @jeanbisutti @trask

[lmolkova]

azure-json could be very helpful here :)