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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-8097) NullPointerException in AMQP 1.0 plugin using OpenJDK
Date Fri, 09 Feb 2018 11:17:00 GMT

    [ https://issues.apache.org/jira/browse/QPID-8097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16358273#comment-16358273
] 

Keith Wall commented on QPID-8097:
----------------------------------


Sorry for the jargon.  By "using AMQP 1.0 against Broker-J" I simple meant using an AMQP 1.0
messaging client library with Broker-J thus taking advantage of the Broker's AMQP 1.0 support,
rather than the older AMQP protocols (which remain supported).  A great deal of work was done
in the AMQP 1.0 protocol layer for 7.0, including addressing some quite serious shortcomings
in memory management that could lead to OutOfMemoryError related to direct memory.   Also
there were a number of areas where the Broker was not conforming to the specifications - these
were addressed too.

With regard to the API for starting an embedding the Broker, it is true that we took the opportunity
to rework it for 7.0.  What was there had rather evolved over time and was quite ugly.  Continuing
to support the old API meant hanging onto to too much baggage, so I am afraid this was a breaking
change.   Apologies for pain in adapting to it.   There is an example here:

https://cwiki.apache.org/confluence/display/qpid/How+to+embed+Qpid+Broker-J

Turning back to your problem, do you have a minimal executable reproduction that shows the
problem?
 

 

> NullPointerException in AMQP 1.0 plugin using OpenJDK
> -----------------------------------------------------
>
>                 Key: QPID-8097
>                 URL: https://issues.apache.org/jira/browse/QPID-8097
>             Project: Qpid
>          Issue Type: Bug
>          Components: Broker-J
>    Affects Versions: qpid-java-6.1.5
>            Reporter: Artyom Safronov
>            Priority: Major
>         Attachments: Qpid stacktrace.txt
>
>
> An unexpected NullPointerException occures in AMQP 1.0 plugin at the first attempt to
connect to the broker using *OpenJDK*.
> The problem was found while running Qpid in unit tests that verify code communicated
with the broker through AQMP. There is a test case that starts Qpid before each test and stops
it after it. That test case verifies a module that establishes a connection with the broker.
The broker refuses the connection because of NullPointerException (see the attached stacktrace). Using *Oracle
JDK* all tests run fine.
> +The first strange+ thing looks like this. Only a test that does the first attempt to
connect always fails. The rest tests run successfully although Qpid are restarted. So the
order of tests is not important. The project is built using Maven and all its plugins are
run within +a single process+ (without fork ability).
> +The second strange+ thing is that the behaivor of Qpid slightly differs using two different
*OpenJDK* versions.
> In a case of *1.8.0_131* version the broker accepts a transport connection but rejects
"OPEN" frame with the next error:
> {code:java}
> io.vertx.core.impl.NoStackTraceThrowable: Error{condition=amqp:not-found, description='Unknown
hostname in connection open: 'default'', info=null}
> {code}
>  In a case of *1.8.0_161* version the broker rejects a transport connection instantly
with the next exception:
> {code:java}
> io.vertx.core.VertxException: Disconnected
>  at io.vertx.proton.impl.ProtonClientImpl.lambda$null$0(ProtonClientImpl.java:80) ~[vertx-proton-3.5.0.jar:?]
>  at io.vertx.proton.impl.ProtonConnectionImpl.fireDisconnect(ProtonConnectionImpl.java:374)
~[vertx-proton-3.5.0.jar:?]
>  at io.vertx.proton.impl.ProtonTransport.handleSocketEnd(ProtonTransport.java:89) ~[vertx-proton-3.5.0.jar:?]
>  at io.vertx.core.net.impl.NetSocketImpl.handleClosed(NetSocketImpl.java:345) ~[vertx-core-3.5.0.jar:?]
>  at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:342) ~[vertx-core-3.5.0.jar:?]
>  at io.vertx.core.impl.ContextImpl.executeFromIO(ContextImpl.java:200) [vertx-core-3.5.0.jar:?]
>  at io.vertx.core.net.impl.VertxHandler.channelInactive(VertxHandler.java:134) [vertx-core-3.5.0.jar:?]
>  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
[netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
[netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224)
[netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1354)
[netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
[netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
[netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:917)
[netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:763) [netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
[netty-common-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403)
[netty-common-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463) [netty-transport-4.1.15.Final.jar:4.1.15.Final]
>  at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
[netty-common-4.1.15.Final.jar:4.1.15.Final]
>  at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161-debug]{code}



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