When the Dubbo service consumer application starts, if the producer application has not been started, it will report an error and exit. How can it be changed to retry with a delay instead of stopping the application?

[cgerx]

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Apache Dubbo Component

Java SDK (apache/dubbo)

Details

As stated, I currently have two applications, pilot-agent and pilot-server. The agent provides services for the server to call through Dubbo. When the agent is not started, starting the server will result in an error and directly terminate the Java process. However, I believe these two should be decoupled. When the server starts, if the agent is not started, it should keep retrying without blocking the startup of the server. Is this possible with Dubbo? The exception I encounter during startup is as follows:

2024-12-10T11:03:45.423+08:00 ERROR 41346 --- [           main] o.a.d.c.deploy.DefaultModuleDeployer     :  [DUBBO] Model start failed: Dubbo Module[1.1.1] start failed: java.lang.IllegalStateException: Failed to check the status of the service com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor. No provider available for the service com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor from the url consumer://192.168.1.28/com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor?application=pilot-server&background=false&dubbo=2.0.2&executor-management-mode=isolation&file-cache=true&interface=com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor&methods=takeScreenshot&pid=41346&qos.enable=false&register.ip=192.168.1.28&release=3.2.11&revision=1.0-SNAPSHOT&side=consumer&sticky=false&timeout=30000&timestamp=1733799794243&unloadClusterRelated=false to the consumer 192.168.1.28 use dubbo version 3.2.11, dubbo version: 3.2.11, current host: 192.168.1.28, error code: 5-14. This may be caused by , go to https://dubbo.apache.org/faq/5/14 to find instructions. 

java.lang.IllegalStateException: Failed to check the status of the service com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor. No provider available for the service com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor from the url consumer://192.168.1.28/com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor?application=pilot-server&background=false&dubbo=2.0.2&executor-management-mode=isolation&file-cache=true&interface=com.xx.pilot.agent.definition.screenshot.service.ScreenshotExecutor&methods=takeScreenshot&pid=41346&qos.enable=false&register.ip=192.168.1.28&release=3.2.11&revision=1.0-SNAPSHOT&side=consumer&sticky=false&timeout=30000&timestamp=1733799794243&unloadClusterRelated=false to the consumer 192.168.1.28 use dubbo version 3.2.11
        at org.apache.dubbo.config.ReferenceConfig.checkInvokerAvailable(ReferenceConfig.java:740) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.ReferenceConfig.checkOrDestroy(ReferenceConfig.java:250) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.utils.SimpleReferenceCache.check(SimpleReferenceCache.java:225) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.utils.SimpleReferenceCache.check(SimpleReferenceCache.java:233) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.deploy.DefaultModuleDeployer.checkReferences(DefaultModuleDeployer.java:441) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.deploy.DefaultModuleDeployer.startSync(DefaultModuleDeployer.java:194) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:156) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextRefreshedEvent(DubboDeployApplicationListener.java:157) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:143) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:52) ~[dubbo-3.2.11.jar!/:3.2.11]
        at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185) ~[spring-context-6.1.5.jar!/:6.1.5]
        at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178) ~[spring-context-6.1.5.jar!/:6.1.5]
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156) ~[spring-context-6.1.5.jar!/:6.1.5]
        at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:451) ~[spring-context-6.1.5.jar!/:6.1.5]
        at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:384) ~[spring-context-6.1.5.jar!/:6.1.5]
        at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:984) ~[spring-context-6.1.5.jar!/:6.1.5]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:627) ~[spring-context-6.1.5.jar!/:6.1.5]
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.2.4.jar!/:3.2.4]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.4.jar!/:3.2.4]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.4.jar!/:3.2.4]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) ~[spring-boot-3.2.4.jar!/:3.2.4]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) ~[spring-boot-3.2.4.jar!/:3.2.4]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-3.2.4.jar!/:3.2.4]
        at com.xx.pilot.server.UIPilotServerApplication.main(UIPilotServerApplication.java:21) ~[!/:1.0-SNAPSHOT]
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) ~[na:na]
        at java.base/java.lang.reflect.Method.invoke(Method.java:580) ~[na:na]
        at org.springframework.boot.loader.launch.Launcher.launch(Launcher.java:91) ~[pilot-server.jar:1.0-SNAPSHOT]
        at org.springframework.boot.loader.launch.Launcher.launch(Launcher.java:53) ~[pilot-server.jar:1.0-SNAPSHOT]
        at org.springframework.boot.loader.launch.JarLauncher.main(JarLauncher.java:58) ~[pilot-server.jar:1.0-SNAPSHOT]

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[AlbumenJ]

You can specify check=false for each reference or global.

[cgerx]

Thank you so much, bro!