I am working on moving my Java application development from Java 8 and JavaFX 8 to Java 11 and JavaFX 11, and am seeing a large performance degradation in log4j between Java 8 and Java 11.
I've found these two issues that appear to have been addressed. Assuming whatever changes/fixes were involved got included in the latest releases, they have not fixed the issue I am seeing. https://github.com/line/armeria/issues/2306 https://issues.apache.org/jira/browse/LOG4J2-2537 For Java 11 I am using AdoptOpenJDK version 11.0.2, OpenJFX version 11.0.2, log4j version 2.14.0 (also tried 2.13.3, and 2.12.1), and NetBeans 12.0. In my Java 8 implementation I'm using log4j 2.12.1. I can supply JDK version if needed. Below is a general representation of what my log4j xml config file looks like. It's the same for Java 8 as for Java 11. I have a Loggers entry for each class in my application. They are all specified the same as the one shown here. In each class file I have code that looks like this: private static final Logger logger = LogManager.getLogger(ClassName.class.getName()); XML File Sample <?xml version="1.0" encoding="UTF-8"?> <Configuration status="warn" monitorinterval="15"> <Appenders> <Console name="Console" target="SYSTEM_OUT"> <PatternLayout pattern="%d{ISO8601} [%t] %-5level %logger{36} - %L - %msg%n"/> </Console> <RollingFile name="RollingLogFile" fileName="logs/app.log" filePattern="logs/app-%i.log" > <PatternLayout> <pattern>%d{ISO8601}_%-5level_[%replace{%t}{stateofmyestate\.}{}]_%replace{%logger{36}}{stateofmyestate\.}{}_%L_%msg%n%ex</pattern> </PatternLayout> <Policies> <SizeBasedTriggeringPolicy size="5 MB" /> </Policies> <DefaultRolloverStrategy max="5"/> </RollingFile> </Appenders> <Loggers> <Logger name = "appname.classname" level = "trace" additivity="false"> <AppenderRef ref="RollingLogFile"/> <AppenderRef ref="Console"/> </Logger> <Root level="trace"> <AppenderRef ref="Console"/> </Root> </Loggers> </Configuration> I have a lot of log messages, many of which are logged as the application is starting. When using Java 11 the logging is causing my application to take at least 6 times longer to start than with Java 8. With Java 8 it takes between 3 and 4 seconds. With Java 11 it takes 25 seconds. I have some other functionality that also does a lot of logging when the log level is set to trace, and in that case the performance goes from seconds in Java 8 to several minutes in Java 11. I've tried various things to troubleshoot, and it appears to be something related to Console logging that is causing the performance issue. If I remove the Console Appenders from my configuration and leave only the RollingFile Appenders, the problem goes away. If I do the opposite and remove the RollingFile Appenders and leave the Console Appenders, I see a tiny improvement in the performance, but it's still way worse than in Java 8. So far I'm testing by running the application through NetBeans. I haven't tried starting the application from a Windows Command window yet. Running into some other issues doing that. Can anyone help me figure out if this is a log4j issue, or if there is something I can change in how I'm using log4j with Java 11, so I can resolve this issue? Thank you. Lisa Ruby --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org
