MetadataReportService 使用Class.forName loadclass

[fangxiaorui]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: xxx
• Operating System version: centos 7
• Java version: 1.8.0

Steps to reproduce this issue

Class.forName 使用的MetadataReportService 的classloader 来加载interface,
但是这个interface 可能是另外的class loader 加载的，会报找不到class.

2019-08-01 12:15:26,110 ERROR org.apache.dubbo.metadata.integration.MetadataReportService[106] -  [DUBBO] publishProvider getServiceDescriptor error. providerUrl: dubbo://192.168.0.9:20880/com.wdk.SpiTes?anyhost=true&application=wdk-plugin-engine&dubbo=2.0.2&generic=false&group=dubbo&interface=com.wdk.SpiTes&methods=speak&proxy=jdk&release=2.7.1-SNAPSHOT&revision=1.0.0-SNAPSHOT&side=provider&version=1.0.0.wdk-serverless-bundle.1.0.0, dubbo version: 2.7.1-SNAPSHOT, current host: 192.168.0.9
java.lang.ClassNotFoundException: com.wdk.SpiTes

Pls. provide [GitHub address] to reproduce this issue.

Expected Result

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Actual Result

What actually happens?

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[cvictory]

I think I will add some code such as Thread.getContextClassLoader to fix this issue.

You should add some code java.lang.Thread#setContextClassLoader. Please make sure you can do it.

[fangxiaorui]

yean , now I had change the code with 2.7.0 source code . use Thread context class loader

[beiwei30]

yean , now I had change the code with 2.7.0 source code . use Thread context class loader

@fangxiaorui Let me know if you are interested in fixing this particular issue by submitting a pull request.