UnsatisfiedLinkError: Could not load J2V8 library. Reasons: no j2v8_linux_x86_64 in java.library.path

[trumpetx]

Executing from a VM, unzipped package, CentOS 6

Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /home/rss/libj2v8_linux_x86_64.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 "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.IllegalStateException: J2V8 native library not loaded
	at com.eclipsesource.v8.V8.checkNativeLibraryLoaded(V8.java:195)
	at com.eclipsesource.v8.V8.createV8Runtime(V8.java:149)
	at com.eclipsesource.v8.V8.createV8Runtime(V8.java:125)
	at com.eclipsesource.v8.NodeJS.createNodeJS(NodeJS.java:58)
	at com.eclipsesource.v8.NodeJS.createNodeJS(NodeJS.java:45)
	at JvmMon.<clinit>(JvmMon.java:12)
Caused by: java.lang.UnsatisfiedLinkError: Could not load J2V8 library. Reasons:
	no j2v8_linux_x86_64 in java.library.path
	/home/rss/libj2v8_linux_x86_64.so: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by /home/rss/libj2v8_linux_x86_64.so)

	at com.eclipsesource.v8.LibraryLoader.loadLibrary(LibraryLoader.java:75)
	at com.eclipsesource.v8.V8.load(V8.java:71)
	at com.eclipsesource.v8.V8.createV8Runtime(V8.java:145)
	... 4 more

[ajermakovics]

Looks like this might be an open issue eclipsesource/J2V8#188

[jncharon]

Hi,

I have the same error here on windows 10 64 :
UnsatisfiedLinkError: Could not load J2V8 library. Reasons: no j2v8_win32_x86_64 in java.library.path

It's weird as the lib in in my build.gradle

[CorrectHorseBatteryStapple]

same on jvm-mon-0.2, windows 7, java 1.8.0_111. Really looking forward to use this interesting tool from command line

jvm-mon.bat

Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.IllegalStateException: J2V8 native library not loaded
        at com.eclipsesource.v8.V8.checkNativeLibraryLoaded(V8.java:195)
        at com.eclipsesource.v8.V8.createV8Runtime(V8.java:149)
        at com.eclipsesource.v8.V8.createV8Runtime(V8.java:125)
        at com.eclipsesource.v8.NodeJS.createNodeJS(NodeJS.java:58)
        at com.eclipsesource.v8.NodeJS.createNodeJS(NodeJS.java:45)
        at JvmMon.<clinit>(JvmMon.java:18)
Caused by: java.lang.UnsatisfiedLinkError: Could not load J2V8 library. Reasons:
        no j2v8_win32_x86_64 in java.library.path

        at com.eclipsesource.v8.LibraryLoader.loadLibrary(LibraryLoader.java:75)
        at com.eclipsesource.v8.V8.load(V8.java:71)
        at com.eclipsesource.v8.V8.createV8Runtime(V8.java:145)
        ... 4 more

[ajermakovics]

At the moment in only runs on Linux an MacOS, #1
There is a windows version of J2v8 library so it should work but haven't tried it yet

[sanbor]

On Ubuntu 16.04 I was getting this warning, but the issue was that I didn't have set JAVA_HOME.

user@ubuntuuser ~/Downloads/jvm-mon-0.2
 % ./bin/jvm-mon        
$JAVA_HOME/lib/tools.jar not found
OpenJDK 64-Bit Server VM warning: You have loaded library /home/user/libj2v8_linux_x86_64.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
Exception in thread "main" java.lang.NoClassDefFoundError: sun/jvmstat/monitor/MonitorException
	at com.jvmtop.view.VMOverviewView.scanForNewVMs(VMOverviewView.java:165)
	at JvmMon.update(JvmMon.java:50)
	at JvmMon.<init>(JvmMon.java:45)
	at JvmMon.main(JvmMon.java:27)
Caused by: java.lang.ClassNotFoundException: sun.jvmstat.monitor.MonitorException
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 4 more
user@ubuntuuser ~/Downloads/jvm-mon-0.2
 % export JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"
user@ubuntuuser ~/Downloads/jvm-mon-0.2
 % ./bin/jvm-mon                               
OpenJDK 64-Bit Server VM warning: You have loaded library /home/user/libj2v8_linux_x86_64.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'.

... jvm-mon opens ...

Maybe the script should check if $JAVA_HOME is set and exit if not.

[ajermakovics]

Maybe the script should check if $JAVA_HOME is set and exit if not.

Probably a good idea

[winston01]

Definitely.

[ajermakovics]

The new script in version 0.3 does the check and automatically sets JAVA_HOME on Mac (if not set already).

[cupdike]

I also got this error trying to run as another user. The app seems to need write permissions on the install directories/files. If that's correct, would suggest adding a test for this in the startup script.

[ramprasathdgl]

I too got this error running as a different user.