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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2021/09/08 03:21:55 UTC

[GitHub] [dubbo] houseyoung opened a new issue #8638: URL.equals抛出npe

houseyoung opened a new issue #8638:
URL: https://github.com/apache/dubbo/issues/8638


   使用dubbo 2.7.13作为客户端时（2.7.10、2.7.12也都试过），reference注册时报出如下异常：
   
   Failed to notify addresses for subscribe consumer://172.20.9.10/XXXXXX?application=YYYYY&category=providers,configurators,routers&check=false&dubbo=2.0.2&init=false&interface=ZZZZZ&metadata-type=remote&methods=AAA,BBB,CCC&pid=1&release=2.7.13&revision=1.0.3-rel-SNAPSHOT&side=consumer&sticky=false&timeout=6000&timestamp=1630303343085, cause: null, dubbo version: 2.7.13, current host: 172.20.9.10 java.lang.NullPointerException: null
   	at org.apache.dubbo.common.URL.equals(URL.java:1693)
   at java.util.HashMap.getNode(HashMap.java:572) 	at java.util.HashMap.containsKey(HashMap.java:596) 	at java.util.HashSet.contains(HashSet.java:204) 	at org.apache.dubbo.registry.integration.RegistryDirectory.toInvokers(RegistryDirectory.java:312) 	at org.apache.dubbo.registry.integration.RegistryDirectory.refreshInvoker(RegistryDirectory.java:190) 	at org.apache.dubbo.registry.integration.RegistryDirectory.refreshOverrideAndInvoker(RegistryDirectory.java:150) 	at org.apache.dubbo.registry.integration.RegistryDirectory.notify(RegistryDirectory.java:132) 	at org.apache.dubbo.registry.support.AbstractRegistry.notify(AbstractRegistry.java:429) 	at org.apache.dubbo.registry.support.FailbackRegistry.doNotify(FailbackRegistry.java:372)
   
   1693行是if (!parameters.get(key).equals(other.parameters.get(key))) {
   我理解这个地方是不可能出现npe的，而且这个报错不是所有reference都出现，只有其中几个reference出现了，而且在其他环境无法复现…请教可能是什么问题？
   
   补，我们的provider是dubbox 2.8.4，不过我们魔改了decode和encode，使得2.7.x和2.8.4可以互通，线上也有几个项目正常调用无异常。。就很奇怪为什么这个项目会报npe。
   最头痛的事，测试环境也没有出现，日志也一行都没有打，我们也不可能在线上环境做远程调试……现在完全没办法排查问题。


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[GitHub] [dubbo] houseyoung commented on issue #8638: URL.equals抛出npe

Posted by GitBox <gi...@apache.org>.
houseyoung commented on issue #8638:
URL: https://github.com/apache/dubbo/issues/8638#issuecomment-916788194


   已解决，我们用的是阿里云的mse做zk，mse的服务治理如果没开通，会写入一个空的remote.project.name字段到zk，只有key没有value，所以导致了npe。


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[GitHub] [dubbo] houseyoung commented on issue #8638: URL.equals抛出npe

Posted by GitBox <gi...@apache.org>.
houseyoung commented on issue #8638:
URL: https://github.com/apache/dubbo/issues/8638#issuecomment-909830469


   原因找到了，是provider出现了双重注册，一个ip注册了两个node导致的。


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[GitHub] [dubbo] houseyoung closed issue #8638: URL.equals抛出npe

Posted by GitBox <gi...@apache.org>.
houseyoung closed issue #8638:
URL: https://github.com/apache/dubbo/issues/8638


   


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[GitHub] [dubbo] houseyoung commented on issue #8638: URL.equals抛出npe

Posted by GitBox <gi...@apache.org>.
houseyoung commented on issue #8638:
URL: https://github.com/apache/dubbo/issues/8638#issuecomment-909830469


   原因找到了，是provider出现了双重注册，一个ip注册了两个node导致的。


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[GitHub] [dubbo] houseyoung closed issue #8638: URL.equals抛出npe

Posted by GitBox <gi...@apache.org>.
houseyoung closed issue #8638:
URL: https://github.com/apache/dubbo/issues/8638


   


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[GitHub] [dubbo] houseyoung removed a comment on issue #8638: URL.equals抛出npe

Posted by GitBox <gi...@apache.org>.
houseyoung removed a comment on issue #8638:
URL: https://github.com/apache/dubbo/issues/8638#issuecomment-909830469


   原因找到了，是provider出现了双重注册，一个ip注册了两个node导致的。


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[GitHub] [dubbo] houseyoung closed issue #8638: URL.equals抛出npe

Posted by GitBox <gi...@apache.org>.
houseyoung closed issue #8638:
URL: https://github.com/apache/dubbo/issues/8638


   


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