[jboss-jira] [JBoss JIRA] (WFLY-3842) Netty direct buffer detection broken due to missing module dependencies

[Jeff Mesnil (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-3842?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeff Mesnil resolved WFLY-3842.
-------------------------------
    Fix Version/s: 9.0.0.Beta1
       Resolution: Done


> Netty direct buffer detection broken due to missing module dependencies
> -----------------------------------------------------------------------
>
>                 Key: WFLY-3842
>                 URL: https://issues.jboss.org/browse/WFLY-3842
>             Project: WildFly
>          Issue Type: Bug
>          Components: JMS
>    Affects Versions: 8.1.0.Final, 9.0.0.Alpha1
>            Reporter: Seth Miller
>            Assignee: Jeff Mesnil
>             Fix For: 9.0.0.Beta1
>
>
> When deploying Wildfly 8.x, you'll see this in the server.log:
> {code}
> INFO [io.netty.util.internal.PlatformDependent] Your platform does not provide complete low-level API for accessing direct buffers reliably. Unless explicitly requested, heap buffer will always be preferred to av
> oid potential system unstability.
> {code}
> Following this into netty, here:
> https://github.com/netty/netty/blob/master/common/src/main/java/io/netty/util/internal/PlatformDependent.java#L581
> Down to here:
> https://github.com/netty/netty/blob/netty-4.0.15.Final/common/src/main/java/io/netty/util/internal/PlatformDependent0.java#L82
> We need access to sun.misc to see if direct buffers are available.
> Adding sun.misc to the netty module removes the log message, but if we TRACE on io.netty, there is one additional message: 
> {code}
> 2014-09-09 13:58:35,512 FINE [io.netty.util.internal.PlatformDependent] -Dio.netty.noJavassist: false
> 2014-09-09 13:58:35,513 FINE [io.netty.util.internal.PlatformDependent] Javassist: unavailable
> 2014-09-09 13:58:35,513 FINE [io.netty.util.internal.PlatformDependent] You don't have Javassist in your class path or you don't have enough permission to load dynamically generated classes.  Please check the configuration for better performance.
> {code}
> We can provide netty with a depends on Javassist to remove the FINE message about performance.
> Workaround:  alter the module io/netty/main/module.xml to include the following {code}
> <module xmlns="urn:jboss:module:1.3" name="io.netty">
>     <resources>
>         <resource-root path="netty-all-4.0.15.Final.jar"/>
>     </resources>
>     <dependencies>
>         <module name="sun.jdk"/>
>         <module name="org.javassist"/>
>     </dependencies>
> </module>
> {code}



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