Hey all, I was wondering if/when a new release was going to drop supporting JDK20, or I guess - more, JDK21 now since that’s not too far off.
Anyway, I was updating my still-in-progress branch to switch up from JDK8 to JDK20 and noticed that it no longer seems to start up properly - all I get is: smx3 | karaf: Ignoring predefined value for KARAF_HOME smx3 | karaf: Enabling Java debug options: -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 smx3 | Listening for transport dt_socket at address: 5005 smx3 | Jul 11, 2023 11:12:25 PM org.apache.karaf.main.Main launch smx3 | INFO: Installing and starting initial bundles smx3 | Jul 11, 2023 11:12:25 PM org.apache.karaf.main.Main launch smx3 | INFO: All initial bundles installed and set to start smx3 | Jul 11, 2023 11:12:25 PM org.apache.karaf.main.Main$KarafLockCallback lockAcquired smx3 | INFO: Lock acquired. Setting startlevel to 100 and then nothing. No logging, not output, nadda. When running just ./bin/shell I get a very bare Karaf shell prompt with bundles starting. In order to run under JDK20, I’ve copied a manually patched jre.properties file with a jdk20 entry, and interestingly I note even tho jdk19 is already in the Karaf 4.4.3 distribution, I can only set javase in karaf-maven-plugin to 18 (but that’s a side track). When looking at the running process, I see a lot of JVM arguments for --add-exports=java.base/sun.net.www.protocol.file=ALL-UNNAMED with an = between —add-exports and its argument, altho when looking at https://docs.oracle.com/en/java/javase/20/migrate/migrating-jdk-8-later-jdk-releases.html#GUID-2F61F3A9-0979-46A4-8B49-325BA0EE8B66 it seems the format is documented as: --add-exports java.management/com.sun.jmx.remote.internal=ALL-UNNAMED with a space. I first noticed that when my own overriden KARAF_SYSTEM_OPTS variable was broken, so I don’t know if this is causing my issues, or if this has changed recently somewhere in JDK builds. Anyway, I’ve been scratching my head for a while now trying to eek out some form of error to be logged that might guide me, but so far nothing - anyone got any suggestions on where I should poke around next to try and diagnose things? Mark -- "Great artists are extremely selfish and arrogant things" — Steven Wilson, Porcupine Tree
