[Scilab-Dev] Scilab GUI and adv-cli fail to launch with java 9

[Clément David]

Hello Atri,

Thanks for your work on porting Scilab to jdk9 ; this NoClassDefFoundError usually comes from a mis-
compilation check the jar content and be sure to load it correctly. About the patches, I just
started to review them and will push them on the 6.0 branch after fixing the build on my machine;
please continue your great work, keeping the patches as small as possible. 

--
Clement

Le mercredi 21 février 2018 à 13:19 +0100, Atri Bhattacharya a écrit :
> Hi,
> After several patches to fix building against java 9, I have been
> finally able to get scilab 6.0.1 building on openSUSE Tumbleweed.
> However, during run time, I now see a ClassNotFoundError, as follows:
> --------------------
> :~> SCIVERBOSE=1 scilab
> SCILABBIN : scilab-bin
> DISABLE_JAVA_DETECTION : 0
> SCILAB_MODE : gui
> OS : Linux
> MODEL : x86_64
> IS_SCILAB_BINARY : 0
> Using specified vm: /usr/lib64/jvm/java
> JAVA_HOME : /usr/lib64/jvm/java
> SCI : /usr/share/scilab/
> SCIBIN : /usr/bin/scilab-bin
> PATH :
> /usr/share/scilab/:/usr/share/scilab//bin:/usr/bin:/home/badshah400/bin
> :/usr/local/bin:/usr/bin:/bin:/usr/lib/mit/bin:/usr/lib/mit/sbin
> CLASSPATH :
> /usr/share/scilab//modules/core/jar/org.scilab.modules.core.jar
> EGL_DRIVER : 
> LD_LIBRARY_PATH :
> /usr/lib64/jvm/java/lib/:/usr/lib64/jvm/java/lib/server/:/usr/lib64/jvm
> /java/lib/native_threads/
> DOCBOOK : /usr/share/xml/docbook/stylesheet/nwalsh/current/
> WARNING: An illegal reflective access operation has occurred
> WARNING: Illegal reflective access by
> org.scilab.modules.jvm.LibraryPath
> (file:/usr/share/scilab/modules/jvm/jar/org.scilab.modules.jvm.jar) to
> field java.lang.ClassLoader.sys_paths
> WARNING: Please consider reporting this to the maintainers of
> org.scilab.modules.jvm.LibraryPath
> WARNING: Use --illegal-access=warn to enable warnings of further
> illegal reflective access operations
> WARNING: All illegal access operations will be denied in a future
> release
> Could not access to the Main Scilab Class:
> Exception in thread "main" java.lang.NoClassDefFoundError:
> org/scilab/modules/core/Scilab
> Caused by: java.lang.ClassNotFoundException:
> org.scilab.modules.core.Scilab
> 	at
> java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClass
> Loader.java:582)
> 	at
> java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Cla
> ssLoaders.java:185)
> 	at
> java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:496)
> 
> Scilab cannot create Scilab Java Main-Class (we have not been able to
> find the main Scilab class. Check if the Scilab and thirdparty packages
> are available).
> --------------
> 
> All patches are available at [1], and also documented on
> http://bugzilla.scilab.org/show_bug.cgi?id=15328
> where unfortunately, I have not seen the needle move much over the
> recent days.
> 
> Scilab does work with java 1.8.0 (have to adapt the JRE paths
> appropriately in bin/scilab); however, as soon as java 9 is used the
> above error is manifested. If someone can help fix this issue, that
> will be very helpful.
> 
> openSUSE uses Java 9 by default now, which means as of now scilab is
> badly broken -- only scilab-cli works -- on openSUSE Tumbleweed and
> soon to be released Leap 15.0. Unless Scilab's compatibility issues are
> fixed, we will have to drop it from the distro unfortunately. 
> 
> Thanks and best wishes.
> 
> [1] https://build.opensuse.org/package/show/home:badshah400:branches:science/scilab
>