[ https://issues.redhat.com/browse/DROOLS-5932?page=com.atlassian.jira.plug... ] Toshiya Kobayashi updated DROOLS-5932: -------------------------------------- Description: If you use JRE instead of JDK, ToolProvider.getSystemJavaCompiler() returns null and will result in NPE later. https://github.com/kiegroup/drools/blob/996e8f40dec9f25650dfb0457eb09bad3... Probably should add a null check and throw an error message, something like "Cannot perform native java compilation: could not find the System's Java compiler. Maybe install a JDK?" FYI) https://groups.google.com/g/optaplanner-dev/c/2UkiCjPua5w/m/BebSTW0zCAAJ https://stackoverflow.com/questions/2543439/null-pointer-exception-while-... https://stackoverflow.com/questions/65682295/course-timetabling-and-confe... was: If you use JRE instead of JDK, ToolProvider.getSystemJavaCompiler() returns null and will result in NPE later. https://github.com/kiegroup/drools/blob/996e8f40dec9f25650dfb0457eb09bad3... Probably should add a null check and throw an error message, something like "Cannot perform native java compilation: could not find the System's Java compiler. Maybe install a JDK?" FYI) https://groups.google.com/g/optaplanner-dev/c/2UkiCjPua5w/m/BebSTW0zCAAJ https://stackoverflow.com/questions/2543439/null-pointer-exception-while-... -- This message was sent by Atlassian Jira (v8.13.1#813001)