how it happend ? java.lang.ClassCircularityError: java/security/Permission

[laojiangdedaima]

more skywalkig-api.log

ERROR 2022-08-25 18:25:47.171 SkywalkingAgent-4-JVMService-produce-0 JVMService : JVMService produces metrics failure.
java.lang.ClassCircularityError: java/security/Permission
at net.nicholaswilliams.java.licensing.LicenseSecurityManager.checkPermission(LicenseSecurityManager.java:242)
at sun.management.Util.checkAccess(Util.java:77)
at sun.management.Util.checkMonitorAccess(Util.java:82)
at sun.management.ThreadImpl.getAllThreadIds(ThreadImpl.java:117)
at org.apache.skywalking.apm.agent.core.jvm.thread.ThreadProvider.getThreadMetrics(ThreadProvider.java:40)
at org.apache.skywalking.apm.agent.core.jvm.JVMService.run(JVMService.java:104)
at org.apache.skywalking.apm.util.RunnableWithExceptionProtection.run(RunnableWithExceptionProtection.java:33)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

ERROR 2022-08-25 18:25:48.213 SkywalkingAgent-4-JVMService-produce-0 JVMService : JVMService produces metrics failure.
java.lang.ClassCircularityError: java/security/Permission
at net.nicholaswilliams.java.licensing.LicenseSecurityManager.checkPermission(LicenseSecurityManager.java:242)
at sun.management.Util.checkAccess(Util.java:77)
at sun.management.Util.checkMonitorAccess(Util.java:82)
at sun.management.ThreadImpl.getAllThreadIds(ThreadImpl.java:117)
at org.apache.skywalking.apm.agent.core.jvm.thread.ThreadProvider.getThreadMetrics(ThreadProvider.java:40)
at org.apache.skywalking.apm.agent.core.jvm.JVMService.run(JVMService.java:104)
at org.apache.skywalking.apm.util.RunnableWithExceptionProtection.run(RunnableWithExceptionProtection.java:33)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

[pg-yang]

what's net.nicholaswilliams.java.licensing.LicenseSecurityManager

[pg-yang]

Your code throw this Exception

[laojiangdedaima]

thx for answer, net.nicholaswilliams.java.licensing.LicenseSecurityManager is a licensing manager

maven :

    <dependency>
      <groupId>net.nicholaswilliams.java.licensing</groupId>
      <artifactId>licensing-core</artifactId>
      <version>1.1.0</version>
    </dependency>

[pg-yang]

This package throw some error. not related with skywalking

[laojiangdedaima]

Actual , without the skywalking，the project is normal. Then I will try to excluded the licensing-core. But my project is depended on that, just for licensing manager.

[wu-sheng]

We don't know what is that project about. But you should know, agent would also inject codes into your runtime.
If that tool checks something about codes, package names, etc., you should consider skywalking as a new component.