[
https://issues.apache.org/jira/browse/SCB-562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16493244#comment-16493244
]
ASF GitHub Bot commented on SCB-562:
------------------------------------
zhengyangyong commented on a change in pull request #729: [SCB-562] fix NPE
when had empty interface (not have any method)
URL:
https://github.com/apache/incubator-servicecomb-java-chassis/pull/729#discussion_r191341145
##########
File path:
core/src/main/java/org/apache/servicecomb/core/definition/SchemaMeta.java
##########
@@ -83,6 +83,12 @@ public String getPackageName() {
}
private void initOperations() {
+ if (swagger.getPaths() == null) {
+ LOGGER.error(swagger.getInfo().getTitle() + " with path " +
swagger.getBasePath()
Review comment:
so, we can process this issue two way :
1. throw a ServiceCombException exception, not NPE
2. Give a error log to let user know it is not an appropriate practice and
fix as quick as possible, and let service go
This issue come from user report, he want fill interface later
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> Java Chassis will throw NPE when producer impl do not contain any method
> ------------------------------------------------------------------------
>
> Key: SCB-562
> URL: https://issues.apache.org/jira/browse/SCB-562
> Project: Apache ServiceComb
> Issue Type: Bug
> Components: Java-Chassis
> Affects Versions: java-chassis-1.0.0-m1
> Reporter: yangyongzheng
> Assignee: yangyongzheng
> Priority: Major
> Fix For: java-chassis-1.0.0-m2
>
>
> If a producer impl do not contain any method like :
> ```java
> @RestSchema(schemaId = "hello")
> @Path("/")
> public class HelloImpl {
> }
> ```
> Then an NPE will throw when startup:
> 2018-05-09 08:50:04,333 [ERROR] cse init failed,
> Exception: java.lang.NullPointerException; null
> java.lang.NullPointerException
> at
> org.apache.servicecomb.swagger.generator.core.utils.ClassUtils.createInterface(ClassUtils.java:212)
> at
> org.apache.servicecomb.swagger.generator.core.utils.ClassUtils.getOrCreateInterface(ClassUtils.java:203)
> at
> org.apache.servicecomb.swagger.generator.core.utils.ClassUtils.getOrCreateInterface(ClassUtils.java:182)
> at
> org.apache.servicecomb.core.definition.schema.AbstractSchemaFactory.generateSwagger(AbstractSchemaFactory.java:112)
> at
> org.apache.servicecomb.core.definition.schema.ProducerSchemaFactory.createSchema(ProducerSchemaFactory.java:110)
> at
> org.apache.servicecomb.core.definition.schema.ProducerSchemaFactory.createSchema(ProducerSchemaFactory.java:47)
> at
> org.apache.servicecomb.core.definition.schema.AbstractSchemaFactory.getOrCreateSchema(AbstractSchemaFactory.java:65)
> at
> org.apache.servicecomb.core.definition.schema.ProducerSchemaFactory.getOrCreateProducerSchema(ProducerSchemaFactory.java:80)
> at
> org.apache.servicecomb.provider.rest.common.RestProducerProvider.init(RestProducerProvider.java:48)
> at
> org.apache.servicecomb.core.provider.producer.ProducerProviderManager.init(ProducerProviderManager.java:45)
> at
> org.apache.servicecomb.core.CseApplicationListener.onApplicationEvent(CseApplicationListener.java:118)
> at
> org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:166)
> at
> org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
> at
> org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383)
> at
> org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:337)
> at
> org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882)
> at
> org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545)
> at
> org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
> at
> org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
> at
> org.apache.servicecomb.foundation.common.utils.BeanUtils.init(BeanUtils.java:37)
> at
> org.apache.servicecomb.foundation.common.utils.BeanUtils.init(BeanUtils.java:33)
> at io.demo.Application.main(Application.java:40)
>
> org.apache.servicecomb.core.CseApplicationListener.onApplicationEvent(CseApplicationListener.java:145)
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