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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"PubSub grpc configuration error","articleBody":"Hello. I'm using PubSub 0.20.0-beta but I have this problem since few versions. \r\nI'm using it with spring boot with Tomcat and deploying to kubernetes on compute engine with COS image. \r\n\r\nWhen trying to push message I get error \"Jetty ALPN/NPN has not been properly configured\".\r\nI have tried  to use Jetty but I got the same error. What's weird, locally it's ok and everything is working.\r\n\r\nI saw there is #2039 where upgrade of grpc lib is mentioned but there is no separate issue for this error. \r\n```\r\n2017-06-24T16:20:34.20659867Z java.lang.IllegalArgumentException: Jetty ALPN/NPN has not been properly configured.\r\n2017-06-24T16:20:34.206602706Z \tat io.grpc.netty.GrpcSslContexts.selectApplicationProtocolConfig(GrpcSslContexts.java:174) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.20660692Z \tat io.grpc.netty.GrpcSslContexts.configure(GrpcSslContexts.java:151) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206610273Z \tat io.grpc.netty.GrpcSslContexts.configure(GrpcSslContexts.java:139) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206613683Z \tat io.grpc.netty.GrpcSslContexts.forClient(GrpcSslContexts.java:109) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206617344Z \tat io.grpc.netty.NettyChannelBuilder.createProtocolNegotiatorByType(NettyChannelBuilder.java:335) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206620776Z \tat io.grpc.netty.NettyChannelBuilder.createProtocolNegotiator(NettyChannelBuilder.java:308) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206624331Z \tat io.grpc.netty.NettyChannelBuilder$NettyTransportFactory$DynamicNettyTransportParams.getProtocolNegotiator(NettyChannelBuilder.java:499) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206627826Z \tat io.grpc.netty.NettyChannelBuilder$NettyTransportFactory.newClientTransport(NettyChannelBuilder.java:448) ~[grpc-netty-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206632384Z \tat io.grpc.internal.CallCredentialsApplyingTransportFactory.newClientTransport(CallCredentialsApplyingTransportFactory.java:61) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.20663599Z \tat io.grpc.internal.InternalSubchannel.startNewTransport(InternalSubchannel.java:209) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206639526Z \tat io.grpc.internal.InternalSubchannel.obtainActiveTransport(InternalSubchannel.java:186) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206658614Z \tat io.grpc.internal.ManagedChannelImpl$SubchannelImplImpl.obtainActiveTransport(ManagedChannelImpl.java:806) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.20666273Z \tat io.grpc.internal.GrpcUtil.getTransportFromPickResult(GrpcUtil.java:568) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206666037Z \tat io.grpc.internal.DelayedClientTransport.reprocess(DelayedClientTransport.java:296) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206669031Z \tat io.grpc.internal.ManagedChannelImpl$LbHelperImpl$5.run(ManagedChannelImpl.java:724) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206672086Z \tat io.grpc.internal.ChannelExecutor.drain(ChannelExecutor.java:87) ~[grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206675044Z \tat io.grpc.internal.ManagedChannelImpl$LbHelperImpl.runSerialized(ManagedChannelImpl.java:715) [grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206678244Z \tat io.grpc.internal.ManagedChannelImpl$NameResolverListenerImpl.onUpdate(ManagedChannelImpl.java:752) [grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.20668125Z \tat io.grpc.internal.DnsNameResolver$1.run(DnsNameResolver.java:174) [grpc-core-1.2.0.jar!/:1.2.0]\r\n2017-06-24T16:20:34.206684289Z \tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_111-internal]\r\n2017-06-24T16:20:34.206687236Z \tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_111-internal]\r\n2017-06-24T16:20:34.206690707Z \tat java.lang.Thread.run(Thread.java:745) [na:1.8.0_111-internal]\r\n```","author":{"url":"https://github.com/Mistic92","@type":"Person","name":"Mistic92"},"datePublished":"2017-06-24T16:35:14.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/2184/google-cloud-java/issues/2184"}