Getting netty error while using grpc with keycloak on quarkus #19462

japoorv · 2023-03-31T08:15:12Z

japoorv
Mar 31, 2023

java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at java.base/java.util.ServiceLoader$ProviderImpl.newInstance(ServiceLoader.java:780)
... 17 more
Caused by: java.lang.ClassCastException: class io.netty.channel.epoll.EpollSocketChannel
at java.base/java.lang.Class.asSubclass(Class.java:3640)
at io.grpc.netty.Utils.epollChannelType(Utils.java:322)
at io.grpc.netty.Utils.(Utils.java:114)

We are using a custom mapper with keycloak. Till now we were using keycloak with wildfly, but we recently tried to upgrade the keycloak image. We started seeing these errors, upon inspection of the docker image we found out that there was a runtime clash happening between the netty libraries being brought by quarkus and those being brought by our mapper (we are using grpc client to make requests which is bringing in netty). So our first solution was to exclude these libraries from our mapper. This led to successful initialization of keycloak but it now fails when our mapper wants to make a grpc call

Address family not supported by protocol: /some.some.svc.cluster.local:8000

Caused by: java.net.ConnectException: connect(..) failed: Address family not supported by protocol
at io.netty.channel.unix.Errors.newConnectException0(Errors.java:155)
at io.netty.channel.unix.Errors.handleConnectErrno(Errors.java:128)
at io.netty.channel.unix.Socket.connect(Socket.java:351)
at io.netty.channel.epoll.AbstractEpollChannel.doConnect0(AbstractEpollChannel.java:773)
at io.netty.channel.epoll.EpollSocketChannel.doConnect0(EpollSocketChannel.java:144)
at io.netty.channel.epoll.AbstractEpollChannel.doConnect(AbstractEpollChannel.java:758)
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.connect(AbstractEpollChannel.java:600)
at io.netty.channel.DefaultChannelPipeline$HeadContext.connect(DefaultChannelPipeline.java:1342)
at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:653)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:632)
at io.netty.channel.ChannelDuplexHandler.connect(ChannelDuplexHandler.java:54)
at io.grpc.netty.WriteBufferingAndExceptionHandler.connect(WriteBufferingAndExceptionHandler.java:157)
at io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerContext.java:655)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:632)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:616)
at io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.java:545)
at io.netty.channel.DefaultChannelPipeline.connect(DefaultChannelPipeline.java:942)
at io.netty.channel.AbstractChannel.connect(AbstractChannel.java:229)
at io.grpc.netty.NettyClientTransport.start(NettyClientTransport.java:306)
at io.grpc.internal.ForwardingConnectionClientTransport.start(ForwardingConnectionClientTransport.java:34)
at io.grpc.internal.ForwardingConnectionClientTransport.start(ForwardingConnectionClientTransport.java:34)
at io.grpc.internal.InternalSubchannel.startNewTransport(InternalSubchannel.java:259)
at io.grpc.internal.InternalSubchannel.access$400(InternalSubchannel.java:66)
at io.grpc.internal.InternalSubchannel$1EndOfCurrentBackoff.run(InternalSubchannel.java:280)
at io.grpc.SynchronizationContext$ManagedRunnable.run(SynchronizationContext.java:214)
at io.grpc.SynchronizationContext.drain(SynchronizationContext.java:95)
at io.grpc.SynchronizationContext.execute(SynchronizationContext.java:127)
at io.grpc.SynchronizationContext$1.run(SynchronizationContext.java:155)
at io.netty.util.concurrent.PromiseTask.runTask(PromiseTask.java:98)
at io.netty.util.concurrent.ScheduledFutureTask.run(ScheduledFutureTask.java:153)
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:406)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:833)

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Getting netty error while using grpc with keycloak on quarkus #19462

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Getting netty error while using grpc with keycloak on quarkus #19462

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japoorv Mar 31, 2023

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japoorv
Mar 31, 2023