When multiple WAR files were deployed to WildFly with the OpenTelemetry subsystem enabled, logs were exported multiple times to the OTLP endpoint. The number of duplicate exports matched the number of deployed applications (N deployments = N duplicates of each log).

See for a thorough, user-submitted analysis and proposed fix: https://github.com/wildfly/wildfly/compare/main...vitecde:wildfly:otel-fix-38