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Print stream not initialized in DefaultUpdateHandler

See original GitHub issue

Hello @mordechaim - I’m encountering some kind of initialization problem that kicks of a NPE which prevents me from understanding why the update is failing.

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.io.PrintStream.println(String)" because "this.out" is null
        at org.update4j.service.DefaultUpdateHandler.clearln(DefaultUpdateHandler.java:153)
        at org.update4j.service.DefaultUpdateHandler.failed(DefaultUpdateHandler.java:74)
        at org.update4j.ConfigImpl.doUpdate(ConfigImpl.java:396)
        at org.update4j.Configuration.update(Configuration.java:915)
        at org.update4j.service.DefaultBootstrap.updateFirst(DefaultBootstrap.java:206)
        at org.update4j.service.DefaultBootstrap.main(DefaultBootstrap.java:147)
        at org.update4j.Bootstrap.start(Bootstrap.java:297)
        at org.update4j.Bootstrap.start(Bootstrap.java:280)
        at org.update4j.Bootstrap.start(Bootstrap.java:182)
        at org.update4j.Bootstrap.main(Bootstrap.java:113)

This is a fairly standard wrapper / business setup and I am inclined to believe that it could be a module-related problem, as it only happens when making an update using a custom jlinked JRE. The JRE is jlinked from Corretto and the release details are

JAVA_VERSION="17.0.0.35.1"
MODULES="java.base java.datatransfer java.xml java.prefs java.desktop java.logging java.management java.security.sasl java.naming java.net.http java.scripting java.transaction.xa java.sql jdk.crypto.ec jdk.jsobject jdk.unsupported jdk.unsupported.desktop jdk.xml.dom"

So what am I looking at? Is this a PBKAC? Am I missing a module that update4j requires but was afraid to ask? 😃