Failed to create channel

[oguilbaud]

Hi,

Usually I use APNS-JAVA and it worked fine. Now I have to use PUSHY, and I have a problem that I can't solve.
I always have this error:

1512 [nioEventLoopGroup-2-1] DEBUG io.netty.handler.ssl.SslHandler  - [id: 0x7463908d, L:/172.24.12.122:51779 - R:api.sandbox.push.apple.com/17.188.168.135:443] HANDSHAKEN: protocol:TLSv1.3 cipher suite:TLS_AES_128_GCM_SHA256
1659 [nioEventLoopGroup-2-1] DEBUG io.netty.handler.codec.http2.Http2ConnectionHandler  - [id: 0x7463908d, L:/172.24.12.122:51779 - R:api.sandbox.push.apple.com/17.188.168.135:443] Sent GOAWAY: lastStreamId '2147483647', errorCode '2', debugData ''. Forcing shutdown of the connection.
14:39:18.752 [nioEventLoopGroup-2-1] WARN com.eatthepath.pushy.apns.ApnsChannelPool - Failed to create channel
java.io.IOException: Stream closed before a reply was received

I have tests with Netty 4.1.74, 4.1.77 with same problem. I have test with P12 certificate and P8 but same probleme again.

If a nice person has a clue to solve the problem, that would be great.

Regards
Olivier

[jchambers]

That's very strange. It sounds like you're successfully establishing a connection, then the server is closing it immediately. That suggests we're getting past the TLS handshake, but then something else is going wrong. Can you share more about what you're trying to do (i.e. a minimized version of the code that's producing this problem)?

Also, what version of Java are you using? And are you using certificate- or token-based authentication with APNs?

[oguilbaud]

For informations, I have test with Oracle Java 8 and OpenJDK 11 with same result :-(

[jchambers]

Well, reading the Netty source, it sounds like Pushy is sending the GOAWAY frame to the server rather than having the server hang up on us. Error code 2 means "internal error" according to the HTTP/2 spec. It's very strange to me that you'd get that without something else in the logs.

For science, could you please remove netty-tcnative? That's my leading suspicion as to what's going wrong.

[oguilbaud]

Hi,

I have removed netty-tcnative and I have same error :

	DefaultDnsQuestion(api.sandbox.push-apple.com.akadns.net. IN AAAA)
	DefaultDnsRawRecord(OPT flags:0 udp:4096 0B)
1041 [nioEventLoopGroup-2-1] DEBUG io.netty.handler.ssl.SslHandler  - [id: 0xe057d3eb, L:/192.168.1.16:57206 - R:api.sandbox.push.apple.com/17.188.168.149:443] HANDSHAKEN: protocol:TLSv1.2 cipher suite:TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
1048 [nioEventLoopGroup-2-1] DEBUG io.netty.handler.codec.http2.Http2ConnectionHandler  - [id: 0xe057d3eb, L:/192.168.1.16:57206 - R:api.sandbox.push.apple.com/17.188.168.149:443] Sent GOAWAY: lastStreamId '2147483647', errorCode '2', debugData ''. Forcing shutdown of the connection.
07:51:13.338 [nioEventLoopGroup-2-1] WARN com.eatthepath.pushy.apns.ApnsChannelPool - Failed to create channel
java.io.IOException: Stream closed before a reply was received
	at com.eatthepath.pushy.apns.ApnsClientHandler.<clinit>(ApnsClientHandler.java:84)
	at com.eatthepath.pushy.apns.TokenAuthenticationApnsClientHandler$TokenAuthenticationApnsClientHandlerBuilder.build(TokenAuthenticationApnsClientHandler.java:84)
	at com.eatthepath.pushy.apns.TokenAuthenticationApnsClientHandler$TokenAuthenticationApnsClientHandlerBuilder.build(TokenAuthenticationApnsClientHandler.java:56)
	at io.netty.handler.codec.http2.AbstractHttp2ConnectionHandlerBuilder.buildFromCodec(AbstractHttp2ConnectionHandlerBuilder.java:550)
	at io.netty.handler.codec.http2.AbstractHttp2ConnectionHandlerBuilder.buildFromConnection(AbstractHttp2ConnectionHandlerBuilder.java:539)
	at io.netty.handler.codec.http2.AbstractHttp2ConnectionHandlerBuilder.build(AbstractHttp2ConnectionHandlerBuilder.java:503)

The version of TLS change but same result :-(

[jchambers]

I've run exactly the code you provided and am unable to reproduce the problem. There must be something about your setup that's weird. Let's keep digging.

• Can you please share the imports from your code? I wonder if somehow we're getting the wrong flavor of… something.
• Are you managing dependencies manually or with something like Maven? If the latter, can you share the results of mvn dependency:tree?

For what it's worth, here's my POM:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.eatthepath</groupId>
    <artifactId>sandbox</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.eatthepath</groupId>
            <artifactId>pushy</artifactId>
            <version>0.15.1</version>
        </dependency>
    </dependencies>
</project>

…and here's the dependency tree that produces:

com.eatthepath:sandbox:jar:1.0-SNAPSHOT
\- com.eatthepath:pushy:jar:0.15.1:compile
   +- io.netty:netty-codec-http2:jar:4.1.74.Final:compile
   |  +- io.netty:netty-common:jar:4.1.74.Final:compile
   |  +- io.netty:netty-buffer:jar:4.1.74.Final:compile
   |  +- io.netty:netty-transport:jar:4.1.74.Final:compile
   |  +- io.netty:netty-codec:jar:4.1.74.Final:compile
   |  +- io.netty:netty-handler:jar:4.1.74.Final:compile
   |  |  \- io.netty:netty-tcnative-classes:jar:2.0.48.Final:compile
   |  \- io.netty:netty-codec-http:jar:4.1.74.Final:compile
   +- io.netty:netty-handler-proxy:jar:4.1.74.Final:compile
   |  \- io.netty:netty-codec-socks:jar:4.1.74.Final:compile
   +- io.netty:netty-resolver-dns:jar:4.1.74.Final:compile
   |  +- io.netty:netty-resolver:jar:4.1.74.Final:compile
   |  \- io.netty:netty-codec-dns:jar:4.1.74.Final:compile
   +- com.eatthepath:fast-uuid:jar:0.2.0:compile
   \- org.slf4j:slf4j-api:jar:1.7.21:compile

[pgus2024]

@oguilb - Were you able to resolve this