java.lang.UnsupportedClassVersionError: org/kontalk/Kontalk : Unsupported major.minor version 52.0

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

,
via Google Groups by Marcus Haebler

Update "latest" to Java 8 on DockerHub.

,
via GitHub by Athou

You're using an older version of java with classes compiled for java7

Solutions on the web

via GitHub by agharbeia
, 1 year ago
org/kontalk/Kontalk : Unsupported major.minor version 52.0
via GitHub by florianvolle
, 1 year ago
org/graylog2/bootstrap/Main : Unsupported major.minor version 52.0
via GitHub by reks99
, 1 year ago
Structorizer : Unsupported major.minor version 52.0
via GitHub by chauffer
, 1 year ago
org/eclipse/jetty/start/Main : Unsupported major.minor version 52.0
via Stack Overflow by evg
, 3 months ago
org/apache/catalina/startup/Bootstrap : Unsupported major.minor version 52.0
via GitHub by ddemaeyer
, 11 months ago
org/tmoerman/adam/fx/avro/SnpEffAnnotations : Unsupported major.minor version 52.0
java.lang.UnsupportedClassVersionError: org/kontalk/Kontalk : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:803)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

Users with the same issue

Samebug visitor profile picture
Unknown user
Once, 11 months ago
Samebug visitor profile picture
Unknown user
Once, 2 years ago
Samebug visitor profile picture
Unknown user
Once, 10 months ago
Once, 1 week ago
2 times, 7 months ago

Write tip

Know the solutions? Share your knowledge to help other developers to debug faster.