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[Octave-bug-tracker] [bug #55174] java warning about java.system.class.l
From: |
Carnë Draug |
Subject: |
[Octave-bug-tracker] [bug #55174] java warning about java.system.class.loader property |
Date: |
Thu, 6 Dec 2018 14:36:51 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0 |
URL:
<https://savannah.gnu.org/bugs/?55174>
Summary: java warning about java.system.class.loader
property
Project: GNU Octave
Submitted by: carandraug
Submitted on: Thu 06 Dec 2018 07:36:50 PM UTC
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: GNU/Linux
_______________________________________________________
Details:
Initializing the JVM with OpenJDK 11 gets the following warning:
octave:1> __java_init__ ;
OpenJDK 64-Bit Server VM warning: Archived non-system classes are disabled
because the java.system.class.loader property is specified (value =
"org.octave.OctClassLoader"). To use archived non-system classes, this
property must be not be set
I'm not sure what that means.
When Octave starts the JVM, it uses the flag
"-Djava.system.class.loader=org.octave.OctClassLoader" (see
https://hg.savannah.gnu.org/hgweb/octave/file/0a145a1600e3/libinterp/octave-value/ov-java.cc#l723
) which I believe is required to support the dynamic class path (source
https://hg.savannah.gnu.org/hgweb/octave/file/0a145a1600e3/scripts/java/org/octave/OctClassLoader.java
)
This new error message comes from OpenJDK and the commit that added it is
http://hg.openjdk.java.net/jdk/jdk/rev/840e26123940 However, I can't make much
sense of it. I don't quite get what CDS is and the two issues mentioned on the
commit message don't make much sense to me
https://bugs.openjdk.java.net/browse/JDK-8193213 and
https://bugs.openjdk.java.net/browse/JDK-8182731
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