In Java 8 and prior there exists the mechanism to use an endorsed directory(java.endorsed.dirs), which is a collection of libraries which overrides JDK internal implementations.
How can I solve this in Java-9? As endorsed dirs where removed there?
In JDK 9, you can use upgradeable modules or put the JAR files on the classpath.
The Java 9 migration guide states:
The
java.endorsed.dirssystem property and thelib/endorseddirectory are no longer present. Thejavaccompiler andjavalauncher will exit if either one is detected.
You would end up finding the error if any of these exists as :
<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs in modular form will be supported via the concept of upgradeable modules. Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.
These endorsed-standards override mechanism was removed to attain Modular Run-Time Images and would now use the modular image.
A modular image is composed of modules rather than JAR files. Going forward, endorsed standards and standalone APIs are supported in modular form only, via the concept of upgradeable modules.