Running on 64 bit Ubuntu

[tmiranda]

I'm having problems getting the server to start on 64 bit Ubuntu. I Get the following errors:

Starting server mode
OpenJDK 64-Bit Server VM warning: -XX:ThreadPriorityPolicy requires root privilege on Linux
OpenJDK 64-Bit Server VM warning: You have loaded library /opt/sagetv/server/libSage.so which migException in thread "main" java.lang.UnsatisfiedLinkError: /opt/sagetv/server/libSage.so: /opt/sagetv/server/libSage.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
	at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965)
	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890)
	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1880)
	at java.lang.Runtime.loadLibrary0(Runtime.java:849)
	at java.lang.System.loadLibrary(System.java:1088)
	at sage.Sage.<clinit>(Unknown Source)
	at SecuredLoader.main(SecuredLoader.java:5)

I think it's because Sage needs 32 bit Java and not 64 bit. I manually removed the 64 bit Java JRE and installed the 32 bit JRE but still get this message. It looks to me like the 64 bit JRE is still there but I have no clue as to why.

I removed the 64 bit version by using:

sudo apt-get remove openjdk-7-jdk openjdk-7-jre

[jreichen]

Yes you'll need a 32-bit JVM but I don't think this particular error message is a JVM issue. It's complaining about not being able to load a 32-bit native library (Sage has some native pieces). You'll need to use apt-get to install 32-bit compatibility libraries for Linux. Sorry I don't have access to my Linux box right now so I can't tell you the name of them, but Google it and you should find what you need.

[tmiranda]

Did a bunch of googling and I do have 64 bit Java installed. The problem is that I'm just not smart enough to figure out how to uninstall it, or at least tell Sage to use the 32 bit version I also have installed.

Everything I read tells me to use "apt-get remove openjdk...." I've done that many times and it still doesn't work

[jreichen]

Run 'java -v' from the terminal to see which java is being used.

Try setting the JAVA_HOME variable to the 32-bit Java path. You may also need to add JAVA_HOME/bin to the PATH environment variable.

IIRC you can add these to the 'sagesettings' script file so it only affects Sage and you don't need to set them manually every time.

[tmiranda]

That worked Thank you very much. I did have to set JAVA_HOME and PATH as you suggested.

[stuckless]

FYI... on most linux distributions, today, there isn't a 32bit compatiblity library (as there was in the past)... Instead you can simply install the 32bit packages by prefixing :i386 to the package.

ie for openjdk...

sudo apt-get install openjdk-7-jdk:i386

For my setup, I manually downloaded the 32bit java, and then I reference in my /opt/sagetv/server/sagesettings file, and that way, I don't need to worry about the system jre.

sagesettings

export JAVA_HOME=/opt/java/current/
export PATH=$JAVA_HOME/bin:$PATH

JAVAMEM=-Xmx984m
JAVAOPTS=-Dhttps.protocols=SSLv3

# for vlc streaming
export SUDO_UID=1001

My /opt/java/ (where I manually download javas

lrwxrwxrwx 1 root root    5 Mar 28 10:46 current -> java7
lrwxrwxrwx 1 root root   11 Mar 28 10:45 java7 -> jdk1.7.0_72
lrwxrwxrwx 1 root root   15 Mar 28 10:46 java8 -> jre1.8.0_40_x86
drwxr-xr-x 8 uucp  143 4096 Sep 26  2014 jdk1.7.0_72
drwxr-xr-x 6 uucp  143 4096 Feb 11 01:26 jre1.8.0_40_x86