Someone with a b4j solution on a productive hosted server?

lemonisdead

Well-Known Member
Licensed User
@KMatle: this is a really good question. In fact, because of my lack of knowledge, I was not able to install a way to start the java files produced by B4J. In fact, I could have been able to install the packages on my Linux VPS with CLI but I wouldn't have been able to execute the apps...
But this thread gave me the idea to test the solution again

s1:~/www/b4j$ java -jar WebAppHelloWorld.jar
main._process_globals (java line: 69)
java.lang.UnsupportedClassVersionError: anywheresoftware/b4j/object/ServerWrapper : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
at java.net.URLClassLoader.access$000(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:212)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
at b4j.example.main._process_globals(main.java:69)
at b4j.example.main.initializeProcessGlobals(main.java:60)
at b4j.example.main.main(main.java:27)
 
Last edited:

lemonisdead

Well-Known Member
Licensed User
@Erel : I due you a lot of thanks because without your help I wouldn't have found that the OpenJDK was used instead of the Oracle one (I had installed Java via apt-get without the proprietary repositories). Now, with the help of that page, I was able to correct my installation.
And guess what : the Web App Hello World is running :)
Many, many thanks for that help because it opens a lot of possibilities
 

lemonisdead

Well-Known Member
Licensed User
I can understand my reply was not exciting at all. Today I have updated a Customer's app including a sync function to a B4J server to save the apps preferences. 50 users were updated. The solution is running smoothly
 

lemonisdead

Well-Known Member
Licensed User
@KMatle : I have installed this first server on a VPS as a test drive. I will publish other projects on a dedicated one (which was not already configured to use the correct Java version at the time I had published).

@Erel : I do really thank you for the quality of your amazing products. Really
 
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