5.3.2 Monitoring the execution time of J2EE application

The functionality for monitoring the J2EE application execution time monitors the request execution time of the EJB and Web applications. If an error such as, infinite loop, is detected in the J2EE application through this functionality, the user can be notified by timing out the method process that did not terminate within the fixed time. You can also use the method cancellation functionality to terminate the transactions forcibly and cancel the methods that are in use.

The functionality for monitoring the J2EE application execution time includes method timeout and method cancellation functionality.

Method timeout functionality

This functionality notifies the user by performing timeout of the method processing that did not terminate within a fixed time, from among the requests existing in the monitoring base. The monitoring base provides the interface required for implementing the functionality for monitoring the J2EE application execution time and manages the monitoring information.

Method cancellation functionality

This function cancels the method after timeout has been notified by the method timeout functionality. The transaction is also concluded forcibly when the database is being accessed at the time of cancellation.

Note that in the method timeout and the method cancellation functionality, the thread dump is output as the log information. The number of thread dump files that are generated can be monitored by the resource depletion monitoring functionality. For the resource monitoring functionality, see 4. Monitoring Resource Depletion.

The following figure shows the functionality for monitoring the J2EE application execution time:

Figure 5‒1: Overview of functionality for monitoring the execution time of J2EE application

The following points describe the commands in the above figure:

• List display command

  This command is used to confirm whether it is possible to execute the method cancellation command, before actually implementing it. For the list display command, see cjlistthread (display thread information) in the uCosminexus Application Server Command Reference Guide.

• Method cancellation command

  This command is used when timeout is detected or when the thread status is invalid. For the method cancellation command, see cjstopthread (stop threads) in the uCosminexus Application Server Command Reference Guide.

• Command for forced termination of application

  This command is used to terminate the application forcibly. For forced termination of applications, see 5.5 Stopping a J2EE application. For the command for forced termination of applications, see cjstopapp (stop J2EE application) in the uCosminexus Application Server Command Reference Guide.

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