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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2022/11/23 11:01:41 UTC
[GitHub] [dubbo] Coegle opened a new issue, #11002: How to make a generic invoke in a daemon coroutine?
Coegle opened a new issue, #11002:
URL: https://github.com/apache/dubbo/issues/11002
- [x] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
It's a Spring project. I want to run a daemon coroutine to invoke remote method. I start a coroutine after a Spring Component postConstruct and invoke the generic call. Exception as following:
```
[23/11/22 18:28:28:471 CST] DefaultDispatcher-worker-1 ERROR deploy.DefaultModuleDeployer: [DUBBO] Dubbo Module[1.1.1] start failed: java.util.ConcurrentModificationException, dubbo version: 3.1.0, current host: 192.168.101.1
java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:996)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.exportMetadataService(DefaultApplicationDeployer.java:920)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.prepareApplicationInstance(DefaultApplicationDeployer.java:613)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.checkState(DefaultApplicationDeployer.java:824)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.notifyModuleChanged(DefaultApplicationDeployer.java:812)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.onModuleStarted(DefaultModuleDeployer.java:251)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:158)
at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:223)
at com.gmair.schedproject.scheduler.service.GenericCallService.getConfig(GenericCallService.kt:28)
at com.gmair.schedproject.scheduler.service.GenericCallService.invoke(GenericCallService.kt:31)
at com.gmair.schedproject.scheduler.service.DaemonComponent$run$1.invokeSuspend(DaemonComponent.kt:19)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)
[23/11/22 18:28:28:471 CST] DefaultDispatcher-worker-1 INFO metadata.ServiceInstanceMetadataUtils: [DUBBO] Start registering instance address to registry., dubbo version: 3.1.0, current host: 192.168.101.1
[23/11/22 18:28:28:481 CST] DefaultDispatcher-worker-1 WARN client.AbstractServiceDiscovery: [DUBBO] No valid instance found, stop registering instance address to registry., dubbo version: 3.1.0, current host: 192.168.101.1
[23/11/22 18:28:28:481 CST] DefaultDispatcher-worker-1 ERROR deploy.DefaultApplicationDeployer: [DUBBO] Dubbo Application[1.1](scheduler) found failed module: Dubbo Module[1.1.1], dubbo version: 3.1.0, current host: 192.168.101.1
java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:996)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.exportMetadataService(DefaultApplicationDeployer.java:920)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.prepareApplicationInstance(DefaultApplicationDeployer.java:613)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.checkState(DefaultApplicationDeployer.java:824)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.notifyModuleChanged(DefaultApplicationDeployer.java:812)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.onModuleStarted(DefaultModuleDeployer.java:251)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:158)
at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:223)
at com.gmair.schedproject.scheduler.service.GenericCallService.getConfig(GenericCallService.kt:28)
at com.gmair.schedproject.scheduler.service.GenericCallService.invoke(GenericCallService.kt:31)
at com.gmair.schedproject.scheduler.service.DaemonComponent$run$1.invokeSuspend(DaemonComponent.kt:19)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask
Exception in thread "DefaultDispatcher-worker-1" java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1042)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:996)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.exportMetadataService(DefaultApplicationDeployer.java:920)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.prepareApplicationInstance(DefaultApplicationDeployer.java:613)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.checkState(DefaultApplicationDeployer.java:824)
at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.notifyModuleChanged(DefaultApplicationDeployer.java:812)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.onModuleStarted(DefaultModuleDeployer.java:251)
at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:158)
at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:223)
at com.gmair.schedproject.scheduler.service.GenericCallService.getConfig(GenericCallService.kt:28)
at com.gmair.schedproject.scheduler.service.GenericCallService.invoke(GenericCallService.kt:31)
at com.gmair.schedproject.scheduler.service.DaemonComponent$run$1.invokeSuspend(DaemonComponent.kt:19)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)
```
Check [here](https://github.com/Coegle/dubboProject) to see the full demo project. Following is the main codes. The GenericCallService.invoke method works fine when I call it from TestController.
``` kotlin
// DaemonComponent.kt
@Component
final class DaemonComponent: DisposableBean {
@Autowired
private lateinit var genericCallService: GenericCallService
@PostConstruct
fun run() {
CoroutineScope(Dispatchers.Default).launch {
genericCallService.invoke(GenericCall("com.gmair.schedproject.TestInterface",
"message",
"com.gmair.schedproject.GenericCallParams", "{\"id\": 5}"))
}
}
override fun destroy() {
println("destroy")
}
}
// GenericCallService.kt
@Service
class GenericCallService {
private val applicationConfig = ApplicationConfig("scheduler")
init {
val registryConfig = RegistryConfig()
registryConfig.address = "zookeeper://127.0.0.1:2181"
applicationConfig.registry = registryConfig
}
private fun newConfig(inter: String): ReferenceConfig<GenericService> {
val referenceConfig = ReferenceConfig<GenericService>()
referenceConfig.setInterface(inter)
referenceConfig.application = applicationConfig
referenceConfig.generic = "true"
return referenceConfig
}
private fun getConfig(inter: String): GenericService {
return newConfig(inter).get()
}
fun invoke(params: GenericCall): Any {
val genericService = getConfig(params.inter)
val param = JSON.parseObject(params.genericCallParams, Class.forName(params.paramName))
val map = genericService.`$invoke`(params.methodName, arrayOf(params.paramName), arrayOf<Any>(param)) as Map<*, *>
return ObjectMapper().convertValue(map, Class.forName(map["class"] as String))
}
}
```
Answer with Chinese is ok. Thanks!
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[GitHub] [dubbo] Coegle commented on issue #11002: How to make a generic invoke in a daemon coroutine?
Posted by GitBox <gi...@apache.org>.
Coegle commented on issue #11002:
URL: https://github.com/apache/dubbo/issues/11002#issuecomment-1326230367
I checked my code and removed dubbo-spring-boot-starter dependency, then It fixed. So I guess the problem is related with starting two dubbo services in one module.
BTW, ReferenceConfig<XXX>.get() function performs well in concurrency situation.
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[GitHub] [dubbo] AlbumenJ commented on issue #11002: How to make a generic invoke in a daemon coroutine?
Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #11002:
URL: https://github.com/apache/dubbo/issues/11002#issuecomment-1326027082
```kt
private fun getConfig(inter: String): GenericService {
return newConfig(inter).get()
}
```
In the short term, can this function be called serially instead of concurrently?
For this concurrency problem, I will take a closer look at what caused it and then optimize it.
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[GitHub] [dubbo] Coegle closed issue #11002: How to make a generic invoke in a daemon coroutine?
Posted by GitBox <gi...@apache.org>.
Coegle closed issue #11002: How to make a generic invoke in a daemon coroutine?
URL: https://github.com/apache/dubbo/issues/11002
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