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From Tim Bain <tb...@alumni.duke.edu>
Subject Re: Occasionally EOF on connection
Date Wed, 26 Apr 2017 20:00:47 GMT
Your right, a connection to localhost should be rock-solid. Sorry I missed
that.

Is there any possibility that a firewall (either OS or application) might
be interfering with your connections? I feel like I'm grasping at straws a
little bit, but I can't explain EOFs on both sides of the connection.

The other variable here is that you're using the CMS client library (which
I have no experience with and which isn't the subject of most posts on this
list), and maybe the EOF it's showing doesn't mean the same thing as an
EOFException would in the Java client library. @Tim Bish, do you see
anything in the described behavior that would be specific to the CMS client
and that might explain what's going on?

Tim

On Apr 20, 2017 8:58 PM, "Marcin Giedz" <marcin.giedz@arise.pl> wrote:

> Hi Tim,
>
> the main issue in this case is that this is over localhost connection -
> URL contains 127.0.0.1 ;) we've got plenty of AMQ clients sitting on the
> same host AMQ broker is running.
>
> wireshark is not a problem at all but I wonder how to "narrow" its
> filtering. Perhaps I can also change log4j in AMQ broker to log more
> details on transport connection level but I can't find how to do this
> without global DEBUG/TRACE option ?
>
> Thx
> Marcin
>
>
> Od: "Tim Bain" <tbain@alumni.duke.edu>
> Do: "users" <users@activemq.apache.org>
> Wysłane: czwartek, 20 kwiecień 2017 7:04:07
> Temat: Re: Occasionally EOF on connection
>
> Nothing in your configuration looks obviously wrong to me.
>
> Is the connection between your broker and the clients that are having
> problems unstable during the period of time that these problems are
> occurring? Simultaneous EOFs on both ends of a socket connection makes me
> think of packet loss or network disconnection; could that be what's going
> on here?
>
> If you're allowed to use it in your environment, Wireshark could help you
> figure out whether the problem is a failure of packets to be sent (e.g. due
> to network problems) or if one side or the other is choosing to close the
> connection.
>
> Tim
>
> On Apr 19, 2017 8:37 AM, "Marcin Giedz" <marcin.giedz@arise.pl> wrote:
>
> > Hello all,
> >
> > in our framework we use AMQ 5.14.1 and CMS version 3.9.4. From time to
> > time we observe connection drops on client's side like the one below:
> >
> > 20170418 10:00:41.902 CRITICAL: void CMSConnectionManager::
> > sltConnectionError(CMSExceptionListener::errorType, QString)
> > "DataInputStream::readLong - Reached EOF" "tcp://127.0.0.1:61616?
> > connection.useAsyncSend=true&soKeepAlive=true&wireFormat.
> > MaxInactivityDuration=240000"
> >
> > in the same time on Broker side this is reported in log file:
> >
> > 2017-04-18 10:00:29,358 | WARN | Transport Connection to: tcp://
> > 127.0.0.1:48612 failed: java.io.EOFException |
> org.apache.activemq.broker.TransportConnection.Transport
> > | ActiveMQ NIO Worker 8
> >
> > questions:
> >
> > 1. is there any way to log more detailed information when EOF occurs ? I
> > mean we don;t want to flood log file with general DEBUG messages but
> rather
> > TransportConnection only to figure out what;s going on when EOF appears ?
> > 2. perhaps we do have something wrong with broker/client settings ?
> >
> > broker (part):
> > <broker xmlns="http://activemq.apache.org/schema/core"
> > brokerName="localhost" dataDirectory="${activemq.data}" useJmx="true"
> > advisorySupport="true" persistent="true" schedulePeriodForDestinationPu
> rge="10000"
> > networkConnectorStartAsync="true" allowTempAutoCreationOnSend="true"
> > deleteAllMessagesOnStartup="false" >
> >
> > <destinationPolicy>
> > <policyMap>
> > <policyEntries>
> > <policyEntry topic=">" producerFlowControl="false" >
> > <pendingSubscriberPolicy>
> > <vmCursor/>
> > </pendingSubscriberPolicy>
> > </policyEntry>
> > <policyEntry queue=">" producerFlowControl="false" >
> > <pendingQueuePolicy>
> > <vmQueueCursor/>
> > </pendingQueuePolicy>
> > </policyEntry>
> >
> > <policyEntry tempTopic="true" producerFlowControl="false" >
> > <pendingSubscriberPolicy>
> > <vmCursor/>
> > </pendingSubscriberPolicy>
> > </policyEntry>
> > <policyEntry tempQueue="true" producerFlowControl="false"
> > gcInactiveDestinations="true" inactiveTimoutBeforeGC="60000">
> > <pendingQueuePolicy>
> > <vmQueueCursor/>
> > </pendingQueuePolicy>
> > </policyEntry>
> >
> > </policyEntries>
> > </policyMap>
> > </destinationPolicy>
> >
> > <persistenceAdapter>
> > <levelDB directory="${activemq.data}/leveldb" logSize="107374182"/>
> > </persistenceAdapter>
> >
> >
> > <systemUsage>
> > <systemUsage>
> > <memoryUsage>
> > <memoryUsage percentOfJvmHeap="80" />
> > </memoryUsage>
> > <storeUsage>
> > <storeUsage limit="20 gb"/>
> > </storeUsage>
> > <tempUsage>
> > <tempUsage limit="10 gb"/>
> > </tempUsage>
> > </systemUsage>
> > </systemUsage>
> >
> > <transportConnectors>
> > <transportConnector name="openwire" uri="nio://0.0.0.0:61616?
> > transport.maximumConnections=1000&amp;wireFormat.
> > maxFrameSize=314572800&amp;transport.keepAlive=true&amp;wireFormat.
> > maxInactivityDuration=240000"/>
> > </transportConnectors>
> >
> > client:
> > [activemq]
> > URL="tcp://127.0.0.1:61616?connection.useAsyncSend=true&
> > soKeepAlive=true&wireFormat.MaxInactivityDuration=240000"
> >
> > Thx
> > Marcin
> >
>
> -
>

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