jmeter - JVM 应该已经退出但没有

Question

在非图形用户界面模式下使用 JMeter 执行脚本和远程测试时我收到错误消息，我该如何解决这个问题

summary =      0 in 00:00:00 = ******/s Avg:     0 Min: 9223372036854775807 Max:
 -9223372036854775808 Err:     0 (0.00%)
Tidying up remote @ Sun Jan 07 21:00:11 EST 2018 (1515376811888)
... end of run
The JVM should have exitted but did not.
The following non-daemon threads are still running (DestroyJavaVM is OK):
Thread[Thread-5,5,main], stackTrace:java.net.DualStackPlainSocketImpl#accept0
java.net.DualStackPlainSocketImpl#socketAccept at line:131
java.net.AbstractPlainSocketImpl#accept at line:409
java.net.PlainSocketImpl#accept at line:199
java.net.ServerSocket#implAccept at line:545
java.net.ServerSocket#accept at line:513
bsh.util.Sessiond#run at line:71
java.lang.Thread#run at line:748

Thread[DestroyJavaVM,5,main], stackTrace:
Thread[Thread-3,5,main], stackTrace:java.net.DualStackPlainSocketImpl#accept0
java.net.DualStackPlainSocketImpl#socketAccept at line:131
java.net.AbstractPlainSocketImpl#accept at line:409
java.net.PlainSocketImpl#accept at line:199
java.net.ServerSocket#implAccept at line:545
java.net.ServerSocket#accept at line:513
bsh.util.Httpd#run at line:70
java.lang.Thread#run at line:748

Answer 1

异常来自守护线程，如所述here :

JMeter will exit all the non-daemon threads it starts, but it is possible that some non-daemon threads may still remain; these will prevent the JVM from exiting. To detect this situation, JMeter starts a new daemon thread just before it exits. This daemon thread waits a short while; if it returns from the wait, then clearly the JVM has not been able to exit, and the thread prints a message to say why.

从异常详细信息来看，您似乎有一些套接字连接。这些可能是 HTTP 采样器，一些其他打开套接字或自定义脚本的采样器。默认情况下，守护线程等待 2 秒，因此如果任何采样器的超时时间更长，可能是守护进程只需要等待更长的时间(或者您需要缩短超时时间)。

所以:

1. 检查您的脚本并找出采样器的超时时间。要么将它们设置为小于 2 秒的数字，要么将 jmeter.properties 中的以下设置更改为高于最大超时值:

   jmeter.exit.check.pause=...
   

   例如，如果您的采样器配置为等待 30 秒，请将此值设置为 32 秒。

2. 如果没有帮助，可能是底层库中存在一些错误。在那种情况下你无法真正解决它，但你可以使用一个相当残酷的解决方法:

   If the property jmeterengine.stopfail.system.exit is set to true (default is false), then JMeter will invoke System.exit(1) if it cannot stop all threads. Normally this is not necessary.

   因此，按照here 所述将以下属性设置为true :

   jmeterengine.stopfail.system.exit=true
   

   help说的，一般情况下没必要，但是如果线程真的卡死了，就没办法了。