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Posted to notifications@dubbo.apache.org by GitBox <gi...@apache.org> on 2022/12/06 09:23:33 UTC

[GitHub] [dubbo] lphu opened a new issue, #11083: java.lang.IndexOutOfBoundsException: null

lphu opened a new issue, #11083:
URL: https://github.com/apache/dubbo/issues/11083

   dubbo版本: 3.0.12
   
   现象: 多注册中心的情况下, 走到ZoneAwareClusterInvoker时未挑选出符合策略的注册中心，默认选取第一个。 如果没有注册中心可用, 看到已经在之前被修复了[#11046 ](https://github.com/apache/dubbo/pull/11046)。 但是此时注册中心是正常的且只有一个Reference会出现此问题，其他机器以及其他Reference均正常。
   
   初步排查结果:  该Reference下游从dubbo3.x 回退版本至dubbo2.x
   
   <img width="660" alt="image" src="https://user-images.githubusercontent.com/33591744/205870270-0ed5fdcd-48f4-4803-8636-08264f382c15.png">
   
   此时两个注册中心均在invokersToReconnect内
   且 MigrationInvoker内 CurrentAvailableInvoker(即ServiceDiscoveryRegistryDirectory为 UnAvailable状态)， Invoker为Avaliable状态.
   
   请问该问题是否和 #10925 此commit有关系?


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[GitHub] [dubbo] lphu commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
lphu commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1346048002

   > > 而接受到新的地址通知时，只修改了RegistryDirectroy内的列表, 并没有把StaticDirectroy内的列表变动
   > 
   > 这个应该是没问题的，StaticDirectroy 会及时恢复的。
   
   你可以根据步骤测试一下, 说的StaticDirectroy未恢复可能有点问题。
   实际是MigrationInvoker 判断CurrentInvoker有误， org.apache.dubbo.registry.client.migration.DefaultMigrationAddressComparator#shouldMigrate 这里即使回滚成Dubbo2.x依旧会选择到serviceDiscoveryInvoker， 导致StaticDirectroy中的定时任务去校验avaliable时，是使用的CurrentInvoker, 导致StaticDirectroy内未恢复.


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[GitHub] [dubbo] lphu commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
lphu commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1342153097

   可以通过此方式复现该问题.  dubbo版本 3.0.12。上游使用双注册中心,  下游正常单注册,  订阅注册策略均为默认.
   
   1. 上下游正常启动,  此时服务正常调用
   2. 关闭下游, 此时在这期间调用某一下游服务, 实际上是No provider, 但是会出现 ZoneAwareClusterInvoker数组越界问题,  同时再进行select 和 reselect时, 会把 StaticDirectroy内的 invoker 移到 toBeReconnet内, 启动一个定时任务check.
   3. 此时下游回滚版本至 2.7.x版本并且换一个ip启动,  启动完成后再请求 2) 同一服务,  此时仍旧报数组越界. 选择 2) 中未请求过的另一服务, 该服务能够正常通过.
   
   Dubbo 内认为注册中心不可用是在请求过程中判断的，如果 avaliable检查失败则移动到toBeReconnect列表内， 而接受到新的地址通知时，只修改了RegistryDirectroy内的列表, 并没有把StaticDirectroy内的列表变动


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[GitHub] [dubbo] AlbumenJ commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1340841649

   > > #10925 这个只是 3.2 中一个新功能的修复，和这个问题没关系。 这个问题应该和 #11046 有关，会在 3.1.4 版本中发布。
   > 
   > #11046 只是修复了不抛出数组越界的异常，改为抛出无服务提供者.
   > 
   > 问题是什么原因会造成该现象, 小概率事件,本地暂时也无法复现。 推测是应用级服务变更时的问题， 只有一个Reference是不正常的, 注册中心(zk)上的值也是正常的，重启之后就正常了
   
   注册中心中没有地址，available 检查为失败，被从服务目录中剔除


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[GitHub] [dubbo] lphu commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
lphu commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1354080844

   @AlbumenJ 麻烦帮忙确认一下


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[GitHub] [dubbo] AlbumenJ commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1344010915

   > 而接受到新的地址通知时，只修改了RegistryDirectroy内的列表, 并没有把StaticDirectroy内的列表变动


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[GitHub] [dubbo] AlbumenJ commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1369499165

   > @AlbumenJ 麻烦帮忙确认一下
   
   
   这个我测试了 3.1.4 版本是没问题的，在几秒后会自动恢复
   


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[GitHub] [dubbo] AlbumenJ commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1339156741

   https://github.com/apache/dubbo/pull/10925 这个只是 3.2 中一个新功能的修复，和这个问题没关系。
   这个问题应该和 https://github.com/apache/dubbo/pull/11046 有关，会在 3.1.4 版本中发布。


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[GitHub] [dubbo] lphu commented on issue #11083: java.lang.IndexOutOfBoundsException: null

Posted by GitBox <gi...@apache.org>.
lphu commented on issue #11083:
URL: https://github.com/apache/dubbo/issues/11083#issuecomment-1340421400

   > #10925 这个只是 3.2 中一个新功能的修复，和这个问题没关系。 这个问题应该和 #11046 有关，会在 3.1.4 版本中发布。
   
   #11046 只是修复了不抛出数组越界的异常，改为抛出无服务提供者.
   
   问题是什么原因会造成该现象, 小概率事件,本地暂时也无法复现。 推测是应用级服务变更时的问题， 只有一个Reference是不正常的, 注册中心(zk)上的值也是正常的，重启之后就正常了


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Re: [I] java.lang.IndexOutOfBoundsException: null [dubbo]

Posted by "wxbty (via GitHub)" <gi...@apache.org>.
wxbty closed issue #11083: java.lang.IndexOutOfBoundsException: null
URL: https://github.com/apache/dubbo/issues/11083


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