[jboss-jira] [JBoss JIRA] (WFLY-9372) NullpointerException in artemis-server-1.1.0.wildfly-017 (and artemis-server-1.5.5.jbossorg-007.jar) when using MQTT

[Justin Bertram (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-9372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13468859#comment-13468859 ] 

Justin Bertram commented on WFLY-9372:
--------------------------------------

When I tested with Wildfly 11.0.0.CR1 I didn't see any issue.  Clients were able to subscribe, publish, etc. as expected.  Here's my module.xml:

{code:xml}
<module xmlns="urn:jboss:module:1.5" name="org.apache.activemq.artemis.protocol.mqtt">
    <resources>
        <resource-root path="artemis-mqtt-protocol-1.5.5.jbossorg-007.jar" />
    </resources>
 
    <dependencies>
        <module name="io.netty"/>
        <!-- required to load ActiveMQ protocol SPI -->
        <module name="org.apache.activemq.artemis"/>
        <module name="org.jboss.logging"/>
    </dependencies>
</module>
{code}

Note, this doesn't include netty-codec-mqtt-5.0.0.Alpha2.jar as those classes are already included in the io.netty module which contains Netty 4.1.9.Final.

I added this to standalone-full.xml:

{code:xml}
    <profile>
        ...
        <subsystem xmlns="urn:jboss:domain:messaging-activemq:2.0">
            ...
                <security enabled="false"/>
                ...
                <remote-acceptor name="mqtt-acceptor" socket-binding="mqtt">  
                	<param name="protocols" value="MQTT"/>  
                </remote-acceptor>
            ...
        </subsystem>
        ...
    </profile>
    ...
    <socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}">
        ...
        <socket-binding name="mqtt" port="1883"/>
    </socket-binding-group>
{code}

> NullpointerException in artemis-server-1.1.0.wildfly-017 (and artemis-server-1.5.5.jbossorg-007.jar) when using MQTT
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: WFLY-9372
>                 URL: https://issues.jboss.org/browse/WFLY-9372
>             Project: WildFly
>          Issue Type: Bug
>          Components: JMS
>    Affects Versions: 10.1.0.Final, 11.0.0.CR1
>         Environment: java8
>            Reporter: Thomas Houtekier
>            Assignee: Jeff Mesnil
>         Attachments: screenshot.png, server.log, standalone-full-ha.xml
>
>
> When connecting a MQTT-client to a wildfly-10.1.0.Final (with embedded artemis 1.1.0), the following NPE is thrown.
> {code}
> Sep:12,15:57:48,464 WARNING (:Thread-2 (activemq-netty-threads-345981593):) [io.netty.channel.DefaultChannelPipeline] An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.: io.netty.handler.codec.DecoderException: java.lang.NullPointerException  
> at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:391) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:311) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:218) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:204) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:828) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:625) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:358) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_112]  
> Caused by: java.lang.NullPointerException  
> at org.apache.activemq.artemis.core.protocol.ProtocolHandler$ProtocolDecoder.decode(ProtocolHandler.java:171) [artemis-server-1.1.0.wildfly-017.jar:]  
> at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:360) [netty-all-4.0.33.Final.jar:4.0.33.Final]  
> ... 9 more  
> {code}
> for more info, see https://developer.jboss.org/message/976007
> Reproducing in straightforward, see 'steps to reproduce'.
> I'm not sure if this is related to the integration of artemis into wildfly, or to the artemis server itself.



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