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Knowledge Base Articles

How do I resolve EUM license usage retrieval errors?

When I try to enable the End User Experience in the Controller, I get a license usage retrieval error While trying to enable the End User Experience in the Controller, it returns an error similar to this one:   EUM license usage retrieval failed (Err...

pclark by AppDynamics Team (Retired)
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How can custom correlation be used with validation?

  Use Case Description Using the flight search sample application, this example shows the use of the validation configuration. Prior to applying the custom correlation configuration with validation, the flow map shows the following.   Flow Map Withou...

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pclark by AppDynamics Team (Retired)
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Custom Correlation for Java Applications

Updated 6/20/18   The following article is intended for users who wish to implement custom correlation between Java applications/tiers using the AppDynamics' Java App Agent version 3.8 and higher.    For information regarding the .NET Agent, see here...

pclark by AppDynamics Team (Retired)
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Why are snapshots missing in the Controller?

How does the monitored application, its BT characteristics and load, affect snapshots in the Controller? Updated on 7/30/18   This article describes common issues that can explain why expected snapshots might be missing in the Controller. The issues ...

pclark by AppDynamics Team (Retired)
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How do I start an agent and WebLogic using an Ant script?

Question I am trying to start the Java Agent in a WebLogic environment that deploys and starts the Weblogic domains via an ANT script. Where in the Ant target do I place the agent. Has anyone tried to do instrumentation via an Ant script?   I added s...

pclark by AppDynamics Team (Retired)
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How do I instrument JBoss Fuse?

Question Has anyone successfully instrumented a JBoss Fuse environment?   Answer Review this blog for the steps someone used for instrumenting JBoss Fuse 6.0.0:  http://peter-on-java.blogspot.com/2013/06/setup-appdynamics-for-fuse-esb-in-5.html

pclark by AppDynamics Team (Retired)
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How do I block external access to the Controller Database?

This topic provides a firewall-based method to block external access to the Controller MySQL Database by dropping all traffic trying to connect to port 3388.   Environment and components Linux such as RHEL, Centos, systems using iptables if your syst...

pclark by AppDynamics Team (Retired)
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How can I determine the root cause of CLR crashes?

Updated on 7/30/18   Question We see CLR crashes happening a few times a day. How can I use AppDynamics to determine the root cause of the crashes?   Answer One issue usually causes multiple CLR crashes. Here are some places to look to help you find...

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pclark by AppDynamics Team (Retired)
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How does transaction correlation work in the Java environment?

This topic describes how transaction correlation works in the Java environment. In principle, it works largely the same for .NET and the other language agents.   Transaction correlation enables AppDynamics to do distributed transaction tracing in mod...

Business Transactions are Fundamentally Distributed.png Typical Cross-JVM Calls.png HTTP Request Structure.png JMS Call.png
pclark by AppDynamics Team (Retired)
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Zero Calls Per Minute for a Business Transaction

Question A number of business transactions are showing up, but they have 0 calls (using data for last one year). Why they would at all show up. If a business transaction was discovered by an agent, that means there was a call for that business transa...

pclark by AppDynamics Team (Retired)
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What should I do if I can't see all EUM pages and Ajax requests?

Question What if you see a case using EUM where you are not seeing all the expected Pages/Ajax requests?    For example, you observe that the Pages/Ajax grid only shows a few requests, even though in the Browser snapshots view you can see many more t...

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pclark by AppDynamics Team (Retired)
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Why is there no data in the Metric Browser?

This may indicate that the agents are not correctly configured. Begin troubleshooting by looking at the server.log file. All log files for Controller are located in the <Controller_Installation_Directory>/logs folder.   Error Message Solution ...

pclark by AppDynamics Team (Retired)
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Policy and Health Rule Configuration Matrix

This article describes how policies and health rules behave depending on which entities/objects are used in the configuration.   You can specify affected entities, such as nodes and tiers, in both Health rules and policies. It is important to underst...

pclark by AppDynamics Team (Retired)
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How can I use AppD4DB to alert if a database instance goes down?

Question How can I use AppD4DB to alert if a database instance goes down? This is not for when an OS goes down. We want to know if SQL Server crashes, for example.   Answer Set up a Custom SQL Alert like this:     If the SQL Connection is successful...

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pclark by AppDynamics Team (Retired)
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Access-Control-Allow-Headers Error in EUM

Symptoms You encounter an issue with the POST to /eumcollector/beacons.   JS error is "Request header field X-TS-AJAX-Request is not allowed by Access-Control-Allow-Headers". Diagnosis Research revealed that Access-Control-Allow-Headers is a CORS pr...

pclark by AppDynamics Team (Retired)
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