I am trying to run a Bioinformatics program for MRS spectrosopy analysis called "jMRUI". The executable for this program is a .sh with the following code:
java -Xss2m -mx1200m -Djava.library.path=lib -jar lib/mrui.jar
I have both the 64bit and 32bit JDK 1.8 installed on my PC at the directory /usr/lib/jvm/.
64bit found at: /usr/lib/jvm/jdk1.8.0_x64/bin/java
32bit found at: /usr/lib/jvm/jdk1.8.0_x86/bin/java
The pointer symbolic link at /usr/bin/java points to /etc/alternatives/java which points to /usr/lib/jvm/jdk1.8.0_x64/bin/java if the 64bit version is currently selected or /usr/lib/jvm/jdk1.8.0_x86/bin/java if 32bit is currently selected. Permissions of all three are below.
lrwxrwxrwx 1 root root 22 Jul 2 17:34 /usr/bin/java -> /etc/alternatives/java
lrwxrwxrwx 1 root root 34 Jul 2 18:29 /etc/alternatives/java -> /usr/lib/jvm/jdk1.8.0_x(VER#)/bin/java
-rwxr-xr-x 1 lillian lillian 5730 Mar 18 02:58 /usr/lib/jvm/jdk1.8.0_x64/bin/java
-rwxr-xr-x 1 lillian lillian 5730 Mar 18 02:58 /usr/lib/jvm/jdk1.8.0_x86/bin/java
I can switch between java versions simply with a bash script that runs the following code: From 32bit java back to 64bit java:
#!/bin/sh
#the next 3 commands are only run initially to install the link alternative
#associations. I give everything the same priority of 1.
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.8.0_x64/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.8.0_x64/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.8.0_x64/bin/javaws" 1
echo 1 | sudo update-alternatives --config java
echo 1 | sudo update-alternatives --config javac
echo 1 | sudo update-alternatives --config javaws
From 64bit to 32bit:
#!/bin/sh
#the next 3 commands are only run initially to install the link alternative
#associations. I give everything the same priority of 1.
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.8.0_x86/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.8.0_x86/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.8.0_x86/bin/javaws" 1
echo 1 | sudo update-alternatives --config java
echo 1 | sudo update-alternatives --config javac
echo 1 | sudo update-alternatives --config javaws
This post told me to also install the following packages for 32bit java. Here is output from all of the suggested test commands.
readelf -l /usr/bin/java
Elf file type is EXEC (Executable file) Entry point 0x8048420 There are 8 program headers, starting at offset 52 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align PHDR 0x000034 0x08048034 0x08048034 0x00100 0x00100 R E 0x4 INTERP 0x000134 0x08048134 0x08048134 0x00013 0x00013 R 0x1 [Requesting program interpreter: /lib/ld-linux.so.2] LOAD 0x000000 0x08048000 0x08048000 0x00710 0x00710 R E 0x1000 LOAD 0x000710 0x08049710 0x08049710 0x00144 0x0014c RW 0x1000 DYNAMIC 0x00072c 0x0804972c 0x0804972c 0x00108 0x00108 RW 0x4 NOTE 0x000148 0x08048148 0x08048148 0x00044 0x00044 R 0x4 GNU_EH_FRAME 0x00069c 0x0804869c 0x0804869c 0x0001c 0x0001c R 0x4 GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x4 Section to Segment mapping: Segment Sections... 00 01 .interp 02 .interp .note.ABI-tag .note.gnu.build-id .hash .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_d .gnu.version_r .rel.dyn .rel.plt .init .plt .text .fini .rodata .eh_frame_hdr .eh_frame 03 .ctors .dtors .jcr .data.rel.ro .dynamic .got .got.plt .data .bss 04 .dynamic 05 .note.ABI-tag .note.gnu.build-id 06 .eh_frame_hdr 07ls -l /lib/ld-linux.so.2
lrwxrwxrwx 1 root root 25 Apr 12 05:44 /lib/ld-linux.so.2 -> i386-linux-gnu/ld-2.19.soldd java
linux-gate.so.1 => (0xf775c000) libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xf7728000) libjli.so => not found libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xf7722000) libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf7573000) /lib/ld-linux.so.2 (0xf775d000)Since libjli.so was not found, I have tried to apt-get at pretty much any recommended package involved with i386. None have changed the "not found" status of libjli.so to found.
When /usr/bin/java points to the 64bit java, jMRUI launches, but crashes when I try to upload an .SDAT file (basically when I open any file). When I try to open a file, I get this error message and then it hangs until you kill the process:
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library
/home/lillian/Downloads/jMRUI-4.0/lib/libfftw.so which might have disabled stack
guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>',
or link it with '-z noexecstack'.
Exception in thread "Thread-1" java.lang.UnsatisfiedLinkError:
/home/lillian/Downloads/jMRUI-4.0/lib/libfftw.so: /home/lillian/Downloads/jMRUI-
4.0/lib/libfftw.so:
wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1929)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1847)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1119)
at fft.Fft.<clinit>(Unknown Source)
at mrui.data.FID.constructSpectrum(Unknown Source)
at mrui.data.Data.constructSpectrum(Unknown Source)
at mrui.data.Data.constructSpectrum(Unknown Source)
at mrui.data.Data.addSignal(Unknown Source)
at mrui.conversion.philips.FilePhil.loadData(Unknown Source)
at mrui.plugin.conversion.ConversionManager.loadFile(Unknown Source)
at mrui.plugin.conversion.FileManagementRead.loadInBackground(Unknown Source)
at mrui.plugin.conversion.FileManagementRead.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
When /usr/bin/java points to the 32bit java, jMRUI does not launch at all, and I get this error message:
./jmrui.sh
Jul 02, 2014 6:56:04 PM mrui.Launcher main
INFO: Log properties loaded
Exception in thread "main" java.lang.UnsatisfiedLinkError:
/usr/lib/jvm/jdk1.8.0_x86/jre/lib/i386/libawt_xawt.so: libXrender.so.1:
cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1929)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1814)
at java.lang.Runtime.load0(Runtime.java:809)
at java.lang.System.load(System.java:1083)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1929)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1835)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1119)
at java.awt.Toolkit$3.run(Toolkit.java:1651)
at java.awt.Toolkit$3.run(Toolkit.java:1649)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.loadLibraries(Toolkit.java:1648)
at java.awt.Toolkit.<clinit>(Toolkit.java:1683)
at sun.awt.AppContext$2.run(AppContext.java:275)
at sun.awt.AppContext$2.run(AppContext.java:264)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.AppContext.initMainAppContext(AppContext.java:264)
at sun.awt.AppContext.access$400(AppContext.java:133)
at sun.awt.AppContext$3.run(AppContext.java:319)
at sun.awt.AppContext$3.run(AppContext.java:302)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.AppContext.getAppContext(AppContext.java:301)
at javax.swing.SwingUtilities.appContextGet(SwingUtilities.java:1860)
at javax.swing.UIManager.getLAFState(UIManager.java:243)
at javax.swing.UIManager.setLookAndFeel(UIManager.java:529)
at javax.swing.UIManager.setLookAndFeel(UIManager.java:579)
at mrui.Launcher.main(Unknown Source)
This site told me the 64bit error message is because jMRUI requires 32bit java, so that's why I have both.
Again, this site tells me 32bit java isn't working because I am "trying to run a 64bit system without a 32bit runtime environment".
Lastly, this site told me to add the -d32 option in my jMRUI.sh bash script. It did not change the shared library error message outcome.
What oh what am I missing? I can't imagine I haven't given enough information, but if you need anything else to help debug this, let me know and I'll send the output your way. Thanks a million in advance!
Having a look at the error messages, I have some conclusions:
you definitely need to run the 32 bit version, the native library in
jMRUI-4.0/lib/libfftw.sois ELF32when you run the 32 bit version, the system looks for a missing library: 'libXrender.so.1' (the 32bit version).
Install the package "libxrender1:i386" (libXrender 32bit) and try again with JDK 32 bit.
来源：https://stackoverflow.com/questions/24543014/shared-libraries-java-32-bit-on-64bit-ubuntu