[GitHub] [skywalking] zhaoyuguang opened a new issue #3155: Can SkyWalking-agent set Can-Redefine-Classes and Can-Retransform-Classes is true?

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zhaoyuguang opened a new issue #3155: Can SkyWalking-agent set Can-Redefine-Classes and Can-Retransform-Classes is true?
URL: https://github.com/apache/skywalking/issues/3155
 
 
   Please answer these questions before submitting your issue.
   
   - Why do you submit this issue?
    - [x] Discussion
   
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   ### Discussion
   - Can SkyWalking-agent set Can-Redefine-Classes and Can-Retransform-Classes is true?
   In some cases, the enhancement of SkyWalking will fail;
   The first java agent, he only enhances the original java class, and transform is true.
   The second is SkyWalking-agent, Can-Retransform-Classes is false
   Look at JVMTI  the `Transformations are applied in the following order`
   ![image](https://user-images.githubusercontent.com/10150229/61763021-735ca900-ae06-11e9-9792-d90311ef1ae3.png)
   So the SkyWalking-agent transform will be invalidated.
   So can we open Can-Retransform-Classes?
   What if set Can-Retransform-Classes is true? Is it better to `set true it` with the set `Can-Redefine-Classes` also true?

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