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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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How do I get JMX Metrics for Database Connections on GlassFish?

JDBC connection pool metrics are not configured out-of-the-box for GlassFish.   To configure them, uncomment the JDBC connection pool section and provide the relevant information in the following file:   <agent_home>/ver<version_number>/conf/jmx/ser...

pclark by AppDynamics Team (Retired)
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Why am I unable to get JMX metrics from a GlassFish Server?

In some situations, JMX metrics from GlassFish are not reported. Also, some metrics may not be enabled by default. Try this solution:   Confirm that JMX monitoring is enabled in the GlassFish server. Navigate to the <agent_home>/ver<version_number>/c...

pclark by AppDynamics Team (Retired)
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Instrumenting Java Web Start Applications

Java Web Start software allows you to download and run Java applications from the web and is included in the Java Runtime Environment (JRE) since release of Java 5.0. Java Web Start applications are launched by using the Java Network Launch Protocol ...

pclark by AppDynamics Team (Retired)
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How do I view a breakdown of HTTP error codes?

Question A count of HTTP error codes appears on the main dashboard. Is there a way to get a list of the specific error codes, such as 301, 401, 404, 500 and so on?   Answer In the Controller UI, go to Troubleshoot -> Errors, select the Exceptions tab...

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pclark by AppDynamics Team (Retired)
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Controller Install Log

Question How can I debug my controller install?   Answer The Controller installer actually keeps a verbose log of what it is doing on every platform. The filename is of the general format i4j_log_Controller_nnnnnnnnnnnnnnnnnnn.log.   On Linux, you ca...

pclark by AppDynamics Team (Retired)
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How do I instrument Adobe ColdFusion?

I need to instrument an Adobe ColdFusion app — how do I do it?   Table of Contents How do I install the Java Agent on Cold Fusion?Tips: ColdFusion with Java AgentResource Summary   How do I install the Java Agent on Cold Fusion? Install the AppDynam...

pclark by AppDynamics Team (Retired)
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Tier and Node Life Cycle

This topic describes the tier and node life cycle within AppDynamics. Phase 1 - Agent Startup Phase 2 - Registration Phase 3 - Metric Registration Phase 4 - Metric Reporting Phase 5 - Metric Rollup   A combination of agent logs and REST logs reveal t...

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pclark by AppDynamics Team (Retired)
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Error Detection Life Cycle

Understanding the AppDynamics error detection life cycle can help you to troubleshoot missing errors and related error metrics. Use agent log files to search for evidence of each phase of error detection and reporting.   Errors and exceptions are cou...

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pclark by AppDynamics Team (Retired)
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Async Thread Detection Life Cycle

Understanding the AppDynamics asynchronous (async) thread detection life cycle can help you to troubleshoot missing threads and related async metrics. Use agent log files to search for evidence of each phase of thread detection and reporting.   The p...

pclark by AppDynamics Team (Retired)
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How do I enable DEBUG level logging?

What are the steps to enabling DEBUG mode for logging? Updated on 7/26/18   Most AppDynamics app agents use INFO level logging by default. Sometimes, it is useful to collect logs with DEBUG level logging—for example: when confirming life cycle phases...

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pclark by AppDynamics Team (Retired)
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Migrating Controller to New Subnet in .NET Environment

ISSUE: Controller IP changed but the .NET Agent doesn't pick up the DNS Change   The agents are configured to use a hostname currently to communicate with the Controller. The Controller's IP address and DNS entry are being changed, for example in the...

pclark by AppDynamics Team (Retired)
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Confirming BT Instrumentation for Web Frameworks

This flowchart describes the steps to confirm BT instrumentation when you are using a web framework. For a complete description of the BT Life Cycle, see: Business Transaction Discovery Life Cycle.     Supported Framework? First check our lists of s...

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pclark by AppDynamics Team (Retired)
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What is the Business Transaction discovery life cycle?

To troubleshoot business transaction discovery it is helpful to have an understanding of the AppDynamics entity life cycle. A business transaction is a discrete piece of business application functionality that is tracked from beginning to end, potent...

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pclark by AppDynamics Team (Retired)
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