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Question by Stan B. · Feb 07, 2012 at 03:33 AM ·

CorrelationEngine- Could not pair node for event

Server log is flooded with these messages:

2012-02-06 15:15:14 WARNING [CorrelationEngine] Received wrong event as first node of a PurePath. Event (com.dynatrace.diagnostics.core.datacenter.events.InsertLinkEventRecord, type: 36, numOfAttachments:0, xxxxx:1576), expected event of type EntryEventRecord with hopCount 1. Suppressing this warning for another 60000 ms.

2012-02-06 15:15:44 WARNING [CorrelationEngine] Could not pair node for event (com.dynatrace.diagnostics.core.datacenter.events.ExitEventRecord, type: 2, numOfAttachments:1,  xxxxxxxxxxx:1576, tagHopCount=3 serialNo:472976). Suppressing this warning for another 60 seconds.

I made a couple of configuration changes trying to make User Experience working. We restarted agents and the server. I am not sure if these event were before the changed and I am not sure why are they are coming and how to fix the problem..

-Stan

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Answer by Günter S. · Jun 12, 2012 at 06:30 PM

Hi Oliver,

please create a ticket on the support portal for this issue. This is most likely related to a config issue, network problem or the server not being able to handle the load.

regards,
Günter

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Answer by Oliver G. · Jun 12, 2012 at 04:31 PM

Hi Andi,
if i look at the "server health" dashboard the meassure "Skipped Events (Server)" shows a sum of around 1070220 skipped events for the last 6h.

When i look at the agents dashboard i see this:

Name

Started

Event Count

Total Class Load Count

Total PurePath Count

Total Skipped Events

Skipped PurePaths

agent1

2012-06-07T22:36:21

245589606

123362

787986

0

0

agent2

2012-06-07T22:50:45

246725970

106230

786851

0

0

best regards
Oliver

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Answer by Oliver G. · Jun 11, 2012 at 03:54 PM

I've recieving the same messages from my server, the agent is located on a apache servicemix jvm.

2012-06-11 06:44:40 WARNING [com.dynatrace.diagnostics.a.bu] Could not pair node for event (com.dynatrace.diagnostics.core.datacenter.events.ExitEventRecord, type: 2, numOfAttachments:0,  >>>agent<<<@>>>host<<<:8828, tagHopCount=4 serialNo:240366000) to Path (null). Suppressing this warning for another 60 seconds.

Is there any solution? - I'm running on version 4.1.0.2974, Platform: Linux 2.6.32.49-0.3-xen, amd64 64bit, Java HotSpot(TM) 64-Bit Server VM 1.6.0_27

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avatar image Andreas G. ♦ · Jun 11, 2012 at 06:18 PM 0
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Hi Günther

This message is caused when you loose events from your agent. dynaTrace sends so called entry and exit events when methods are executed. In case the Entry event is lost the exit event will cause this log message as we never received the entry event.
This can be caused by multiple things, e.g: you had a problem with your network connection between your agent and collector/server and that caused some events to be lost. it could however also be a specific problem with your environment where we have an issue generating the correct events.

Please check if you may loose events. Check out the Deployment Dashboards or the Agent Overview Dashlet to verify these values.
If you need additional help on this I would contact our support team

Andi

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Answer by Andreas G. · Feb 07, 2012 at 02:43 PM

Hi Stan

I would create a support ticket for this so that our engineering team can have a look at this in more detail. When opening a Support Ticket you will be asked to attach a Support Archive which contains all relevant information (System Profile, Log Files, ...) to troubleshoot the problem.

  • The Support Archive can be exportet through the System Information Dashlet.
  • You can create a ticket through http://support.dynatrace.com

Andi

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