[jira] [Assigned] (IGNITE-7547) Failing to deploy service created by Proxy.newProxyInstance() on multiple nodes

["Ilya Kasnacheev (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-7547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ilya Kasnacheev reassigned IGNITE-7547:
---------------------------------------

    Assignee:     (was: Ilya Kasnacheev)

> Failing to deploy service created by Proxy.newProxyInstance() on multiple nodes
> -------------------------------------------------------------------------------
>
>                 Key: IGNITE-7547
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7547
>             Project: Ignite
>          Issue Type: Bug
>          Components: compute
>    Affects Versions: 2.4
>            Reporter: Ilya Kasnacheev
>            Priority: Major
>
> When a new node comes with a service which is already defined in the cluster (by name), the following check is made:
> deployed.configuration().equalsIgnoreNodeFilter(newCfg)
> It checks for several parameters, including Service's class.equals().
> If a normal class is used, it will work. However, sometimes Service implementation is created with java.lang.reflect.Proxy.newProxyInstance().
> This method creates new classes on demand. They will have names like $ProxyNN, where NN is ordinal which cannot be depended on. On different nodes the ordering of proxies will be different. This means that equality for these classes cannot be dependent on.
> And indeed it causes problems, as follows
> {code:java}
> Caused by: class org.apache.ignite.IgniteCheckedException: Failed to deploy service (service already exists with different configuration) [deployed=LazyServiceConfiguration [srvcClsName=com.sun.proxy.$Proxy0, svcCls=, nodeFilterCls=], new=LazyServiceConfiguration [srvcClsName=com.sun.proxy.$Proxy1, svcCls=$Proxy1, nodeFilterCls=]]
>     at org.apache.ignite.internal.processors.service.GridServiceProcessor.writeServiceToCache(GridServiceProcessor.java:689)
>     at org.apache.ignite.internal.processors.service.GridServiceProcessor.deployAll(GridServiceProcessor.java:590){code}
> My proposal follows: we should check that both classes respond to Proxy.isProxyClass() before comparing classes. If they are, consider them equal. I don't think we can check more.



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