Using JVM logs to troubleshoot a Sametime server

To start troubleshooting a problem, check the JVM log files first. These log files collect output for the SystemOut.log and SystemErr.log output streams for the application server process.

About this task

An application can write print data to the JVM logs either directly in the form of System.out.print() or System.err.print() method calls or by calling a JVM function, such as Exception.printStackTrace(). In addition, the SystemOut.log JVM log contains system message events written by the WebSphere® Application Server. In the case of a WebSphere Application Server Network Deployment configuration, JVM logs are also created for the deployment manager and each node manager, since they also represent JVMs.
  • SystemOut.log is more useful monitoring the health of the running application server but can help in determining a problem, although it's better to use the IBM® Service log and the advanced capabilities of the Log Analyzer to determine a problem.
  • SystemErr.log contains exception stack trace information that is useful when performing problem analysis.

The JVM log files are self-managing to the extent that you can configure the log file size and how many historical, or archived, files to keep. For information on setting log file size, see Setting log file size and rotation.

You can use JVM log files to troubleshoot the following Sametime® servers:
  • SIP Proxy/Registrar
  • Conference Manager
  • Video Manager
  • Meeting Server
  • Advanced Server
  • Bandwidth Manager
  • Gateway Server

Procedure

  1. In the WebSphere Integrated Solutions Console, click Troubleshooting > Logs and Trace.
  2. Click the server name whose logs you want to view or customize.
  3. In the "General Properties" section, click JVM Logs.
    Note: Any configuration changes to the JVM logs that are made to a running Sametime server do not take effect until you restart the server.
  4. To configure or change a log setting, use the settings on the Configuration tab.
  5. Save the change to the master configuration by clicking the Save link in the "Messages" box at the beginning of the page.
  6. To view the output of the logs, click the Runtime tab, then click View.