Java 错误：JDWP 无法获取 JNI 1.2 环境
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ERROR: JDWP Unable to get JNI 1.2 environment
提问by Carlos Blanco
I get this error after debugging in Eclipse. The debug is successful though.
在 Eclipse 中调试后出现此错误。不过调试成功。
ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183): [../../../src/share/back/util.c:820]
What does it mean?
这是什么意思？
采纳答案by Pascal Thivent
Looks like http://bugs.sun.com/view_bug.do?bug_id=6476706which has low priority and is still not fixed. Definitely a Mustang bug but no clear explanation (seems to occur pretty randomly according to the bug reporters on top of that).
看起来像http://bugs.sun.com/view_bug.do?bug_id=6476706，它的优先级很低，仍然没有修复。绝对是野马错误，但没有明确的解释（根据错误报告者的说法，似乎是随机发生的）。
回答by bmargulies
It's apparently a JVM bug. It's harmless and unpredictable.
这显然是一个JVM错误。这是无害的和不可预测的。
回答by Vasile Surdu
Just add System.exit(0);to the end of your main method.
只需添加System.exit(0);到您的主要方法的末尾。
That's all you have to do.
这就是你所要做的。
回答by CocheLee
@Everyone I'm facing this problem using the image API reading and writing files over the network, when I run the program working with local files this doesn't happen. After verifiying my results I confirmed that it really doesn't do any harm (at least on my debugging). Now that I'm reading this post I stopped looking into it.
@Everyone 我在使用图像 API 通过网络读取和写入文件时遇到了这个问题，当我运行使用本地文件的程序时，这不会发生。在验证我的结果后，我确认它确实没有任何伤害（至少在我的调试中）。现在我正在阅读这篇文章，我不再研究它。
回答by Ian
Happens on something as simple as this tutorial
发生在像本教程一样简单的事情上
//trim spaces
String s2 = "Welcome!";
int len1 = s2.length();
System.out.println(len1);
String s3 = s2.trim();
System.out.println(s3.length());
Happens if run program too fast multiple times so something to do with system performance?
如果多次运行程序太快会发生什么与系统性能有关？
ERROR: JDWP Unable to get JNI 1.2 environment, jvm->GetEnv() return code = -2
JDWP exit error AGENT_ERROR_NO_JNI_ENV(183): [../../../src/share/back/util.c:838]
回答by Adil Ras
I have noticed this occurs when I am using a workspace stored on my USB drive and sometimes on my work's network. It is not a major issue and doesnt seem to have any effect on the execution of any of my programs. I tested @Vasile Surdu's solution of addingSystem.exit(0);to the end of the main method and it works. Another solution is to restart eclipsewhich works for me most of the time.
我注意到当我使用存储在我的 USB 驱动器上的工作区时会发生这种情况，有时在我的工作网络上。这不是主要问题，似乎对我的任何程序的执行都没有任何影响。我测试了@Vasile Surdu 添加System.exit(0);到 main 方法末尾的解决方案并且它有效。Another solution is to restart eclipse大多数时候这对我有用。
