On Wed, Mar 20, 2019 at 4:45 PM Romain Manni-Bucau <rmannibu...@gmail.com> wrote:
> Most of the time monitoring is done through a custom exporter in practise > based on other impl - sigar, library integration like > hibernate/eclipselinks ones, metrics, microprofile etc... - and JMX is not > then used - not judging it is good, bad, lack of knowledge or not, just > saying what i see. > Now I'm happy if JMX is made graal compatible. From what I saw, mainly the > MBeanServer and Notifier (through the hierarchy it goes until that point in > the JVM in standard mbeans) are blocking the compilation. I'm pretty sure > these parts of Tomcat can be extracted in a particular class and then > substrated which would make it graal compatible probably. > Ok, so I had a (quick) look, and this doesn't seem to be something that is adapted to Tomcat at this time. Steps: - I built the embedded packaging here https://github.com/apache/tomcat/tree/master/res/tomcat-maven - It produces a standalone jar in target/tomcat-maven-1.0.jar - Une the graal tool $GRAALVM/bin/native-image -jar target/tomcat-maven-1.0.jar Produces: Error: No instances are allowed in the image heap for a class that is initialized or reinitialized at image runtime: java.util.logging.SimpleFormatter Detailed message: Error: No instances are allowed in the image heap for a class that is initialized or reinitialized at image runtime: java.util.logging.SimpleFormatter Trace: object java.util.logging.ConsoleHandler object java.lang.Object[] object java.util.concurrent.CopyOnWriteArrayList object java.util.logging.LogManager$RootLogger object java.util.logging.Logger object org.apache.juli.logging.DirectJDKLog method org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleState, Object, boolean) Call path from entry point to org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleState, Object, boolean): at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:390) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:193) at org.apache.catalina.startup.Tomcat.start(Tomcat.java:455) at org.apache.catalina.startup.Tomcat.main(Tomcat.java:1444) at com.oracle.svm.core.JavaMainWrapper.run(JavaMainWrapper.java:152) at com.oracle.svm.core.code.IsolateEnterStub.JavaMainWrapper_run_5087f5482cc9a6abc971913ece43acb471d2631b(generated:0) If you want to work on this, you can (git makes it easy) but it looks a bit daunting at this point (java.util.logging is not supported either ? this is not documented at https://github.com/oracle/graal/blob/master/substratevm/LIMITATIONS.md ). Rémy
