Class JavaLaunchHelper is implemented in two places

原创
2020/04/04 22:47
阅读数 111

Mac 上的老bug,jdk版本 java version "1.8.0_144", 在java启动时使用了-javaagent参数时会触发。

此问题通过升级jdk版本即可。

You can find all the details here:

IDEA-170117 "objc: Class JavaLaunchHelper is implemented in both ..." warning in Run consoles It's the old bug in Java on Mac that got triggered by the Java Agent being used by the IDE when starting the app. This message is harmless and is safe to ignore. Oracle developer's comment:

The message is benign, there is no negative impact from this problem since both copies of that class are identical (compiled from the exact same source). It is purely a cosmetic issue.

The problem is fixed in Java 9 and in Java 8 update 152.

If it annoys you or affects your apps in any way (it shouldn't), the workaround for IntelliJ IDEA is to disable idea_rt launcher agent by adding idea.no.launcher=true into idea.properties (Help | Edit Custom Properties...). The workaround will take effect on the next restart of the IDE.

I don't recommend disabling IntelliJ IDEA launcher agent, though. It's used for such features as graceful shutdown (Exit button), thread dumps, workarounds a problem with too long command line exceeding OS limits, etc. Losing these features just for the sake of hiding the harmless message is probably not worth it, but it's up to you.

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