Foglight for JMX 5.9.8 - Application Servers User Guide


	TIP: To shorten the list of rules, select the cartridge that contains the rule from the Cartridge list (for example, ApplicationServers-Java), or if you know the name of the rule, use the Search box.

From the menu that opens, select View and Edit.

In the Rule Detail dialog box that opens, click Rule Editor.

The Edit Rule Page opens.

Click the Conditions, Alarms & Actions tab.

Select a severity level (for example, Warning) and click the Action tab.

From the Action menu, select RequestTracesAction.


	IMPORTANT: This action was called JavaEETracesAction in previous versions.

Click Add to add the RequestTracesAction.

The default action parameters are listed, as follows:

•

Request Type — Use this action parameter to specify unique request types.


	NOTE: The Request Type action parameter is required; all others are optional.

•

Collect Parameters — Use this action parameter to collect all parameters.

•

Collect in full detail — Use this action parameter to indicate whether you want to collect methods in full detail or component detail (the default).

•

Count — Use this action parameter to specify the number of traces being collected.

•

Criteria — Use this action parameter to specify one or more criteria.

Create an expression type Severity Level Variable to specify the criteria. Use any of the arguments listed in the AppServerCollectTraces function table to define the criteria string. For example:

def criteria = [];

criteria.add("responseTimeOver:10000"); // > 10 seconds

//criteria.add("exceptional");

//criteria.add("incomplete");

return criteria;

// comment: response times are in milliseconds

•

Duration — Use this action parameter to indicate the time period to collect the number of traces.

•

Is Regular Expression — Use this action parameter if you want to specify the Request Type using regular expressions to match the request type for a single trace collection.

•

Match All criteria — Use this action parameter to limit the trace collection to all or any of the following criteria:

•

The response time of the request is over a specified threshold.

•

The response time of the request is under a specified threshold.

•

The request exits due to an exception.

•

The request is incomplete, or a parameter of the request is set to a specific value.

•

The agent name IDs — Use this action parameter to specify the agentNameIDs property of the agent that you want to collect traces on.

Create an expression type Severity Level Variable to specify the agent. For example, to use a variable to specify an agent in Groovy:

def agentNameID = [];

agentNameID.add(scope.agent.agentNameID);

return agentNameID;

•

Track SQL Parameters — Use this action parameter to track SQL bind variable values. The default value is set to Off.

In the Value column for Request Type, click Default and specify the value.

Click Change to update the action parameter.

Once the action parameters have been updated, click Save All.

For more information about rules, see Getting started: view and edit rule definitions in the Foglight Administration and Configuration Help.

Using Groovy to collect single traces

You can also use a Groovy script to collect single traces. In Groovy, request types are specified by a regular expression, so the same set of single trace criteria can be used for a group of request types.

When you have a group of request types for which you want to collect single traces using the same criteria, set the criteria using a Groovy script called from the command line (for example, using fglcmd). The collected single traces are stored on the Foglight Management Server, and displayed in the Application Servers Monitor > Requests view for users to review. Use the following function to trigger the collection of requested traces.

AppServerCollectTraces function


	NOTE: This function was called JEECollectTraces in previous versions. Any existing Groovy scripts using JEECollectTraces continue to work. You do not need to update them.

This function is used to collect traces in Groovy. Set all the following arguments:

Table 16. Required arguments for the AppServerCollectTraces Groovy function.
Argument	Description
requestType: String	Request type to collect trace.
isRegEx: Boolean	Request type for which to collect a trace defined as regular expression (true/false).
tracePeriod: Long	Duration (in seconds) of the request to trace.
count:Integer	The number of traces to collect.
CollectInFullDetail:Boolean	Collect in Full Detail (true/false). For details about instrumentation levels, see Appendix: Application Methods in the Foglight for Java EE Technologies Installation Guide.
trackSQLParams:Boolean	Track SQL Parameters (true/false).
matchALL:Boolean	Match all the criteria (true/false).
criteria:List	A list of criteria. See the next table for details.
CollectParameters:Boolean	Collect all trace parameters (true/false).
agents:List	List of agents to collect traces on. If the list is empty or null, then traces are collected on all agents.

Criteria are specified as a list of one or more strings.

Table 17. Criteria for the AppServerCollectTraces Groovy function
Format	Example
all	all
none	none
responseTimeOver:t	ReponseTimeOver:600001
responseTimeUnder:t	ResponseTimeUnder:10001
exceptional	exceptional
incomplete	incomplete
traceParameterContains:k:v	traceParameterContains:name:Bob
traceParameterDoesNotContain:k:v	traceParameterDoesNotContain:name:Tom
traceParameterIs:k:v	traceParameterIs:user:Bob
traceParameterIsNot:k:v	traceParameterIsNot:user:Tom
traceParameterStartsWith:k:v	traceParameterStartsWith:accountnumber:0
traceParameterEndsWith:k:v	traceParameterEndsWith:accountnumber:9

1 Criteria are in milliseconds.

For example:

// Collect 5 traces in full detail for request "GET /samples/test.do" for 15 minutes

// only if response time is over 1 minute and user is Bob for the agent

def criteria = [];

criteria.add("traceParameterIs:user:Bob");

criteria.add("responseTimeOver:60000");

def agentNameIDs = [];

agentNameIDs.add(appServer.monitoringAgent.agentNameID);

// appServer is the server topology object

AppServerCollectTraces("GET /samples/test.do", false, 900, 5, false, true, true, criteria, true, agentNameIDs);

Viewing traces

After you have configured trace collection, you can review the trace details through the Traces view.

To view single trace details:

On the navigation panel, under Dashboards, click Application Servers > Monitor.

On the Application Servers Monitor dashboard, click the Requests tile.

In the Traces column of the Request Types table, click the number of traces for the request.

The Traces view opens, displaying both Aggregated Traces and Single Traces.

Optional — To view aggregated trace details, click a server name in the Aggregated Traces table, or to view single trace details, click a server name in the Single Traces table. The Trace Diagnosis view opens.

Traces view

Use the Traces view to review individual traces of a selected request. This view is divided into four sections: Aggregated Traces table, Single Traces table, Component Technology Breakdown, and Performance charts.

From the Traces view, you can set a breakdown of execution time by selecting Tiers and Component Technologies. By setting any of these options, a selected single trace or an aggregate trace can be used as a comparison benchmark for all the traced metrics. Once specified, both the list view and the tree view display the comparison in the Average Execution Time and Average Exclusive Time columns, and the rest of the metrics comparisons are shown at the bottom of the page, in the method details area.

To learn more about how to set a breakdown, see Viewing breakdowns .

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Foglight for JMX 5.9.8 - Application Servers User Guide

Using a rule action to collect single traces

Using Groovy to collect single traces

Viewing traces

Traces view