java.lang.UnsupportedClassVersionError when deploy on PCF

Asked Apr 25 '22 at 17:04

Active Apr 25 '22 at 17:04

Viewed 389 times

I recently updated java version of a springboot project from 8 to 11.

Then I navigate to the subproject folder main_project/event_producer, login to PCF, then pushed it to PCF with following command (cf8 push event-producer -m 2G -b java_buildpack -p target\event-producer-2.0.5-SNAPSHOT.jar).

However, the deployed app crashed with error: Exception in thread "main" java.lang.UnsupportedClassVersionError: com/gm/cca/kafka/EventProducerApplication has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

This is my first time deploy on PCF. Is there anyway to solve this error?

asked Apr 25 '22 at 17:04

Henry Bai

You could try setting source to 1.8 and target to 1.8 in your compiler and rebuild – g00se Apr 25 '22 at 17:39
2

Seems it's more or less answered here: https://stackoverflow.com/questions/43533252/specify-jdks-version-in-pom-xml-or-manifest-yml – JockX Apr 25 '22 at 21:17
Agree with @JockX, that's the answer. – Daniel Mikusa Apr 26 '22 at 14:27
Thank you guys. But I'm required to using java 11 with my project. I cannot downgrade it to 1.8 – Henry Bai Apr 26 '22 at 15:31
@JockX Thanks! I followed one of the answer using '$ cf set-env JBP_CONFIG_OPEN_JDK_JRE '{ jre: { version: 11.0.6_10 } }' command and it works. – Henry Bai Apr 26 '22 at 16:09

java.lang.UnsupportedClassVersionError when deploy on PCF

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