System event logging

The system event logging facility of IBM WebSphere Portal enables the recording of information about the operation of WebSphere Portal.

Event logs provide administrators with information on important or abnormal events, especially errors that occur during the operation of the product. In addition, event logs gather debugging information that helps IBM support to resolve problems.

WebSphere Portal provides two types of logging: logging of messages and logging of debugging messages called traces.

For information about how to use log files and a list of trace logger strings refer to the topic about WebSphere Portal logs.

Message logging

WebSphere Portal provides the logging of messages that report errors and status information.

The following types of messages are provided:

Informational

A condition worth noting but does not require the user to complete an action.

Warning

An abnormal condition has been detected. The user may have to take action. However, WebSphere Portal code is able to handle the condition without failing.

Error

A serious failure in the execution of the application that requires further action.

Messages for WebSphere Portal are logged in the following files:

SystemOut.log

Contains information that is useful for monitor the health of the WebSphere Portal server and all running processes.

System.err

Contains exception stack trace information that is useful when performing problem analysis.

Locating the log files: Log files for WebSphere Portal, including SystemOut.log and System.err are located in the following directory: WP_PROFILE/logs/WebSphere_Portal

Trace logging

WebSphere Portal provides the logging of debugging messages called traces. These traces are useful for fixing problems. However, to save system resources, they are switched off by default.

Traces can be set for different durations:

Temporary

Traces can be set for a temporary period using the administration portlet Enable Tracing or the WebSphere Integrated Solutions Console. To set traces by using the portlet, complete the following steps:

1. Log in as the administrator.

2. Click Administration > Portal Analysis > Enable Tracing. The Enable Tracing portlet appears.

3. Type the required trace string into the field Append these trace settings:. For example, this can be com.ibm.wps.command.credentialvault.*=finest

4. Click the Add icon. Enable Tracing updates the field Current trace settings:

Restarting WebSphere Portal will remove traces that were set using the Enable Tracing Administration portlet. To disable tracing, do either of the following:

• Select the current trace settings under Current trace settings: and click the Remove icon. By the example, the current setting can be com.ibm.wps.command.credentialvault.*=finest.

• Type the trace string *=info into the field Append these trace settings: and click the Add icon. This trace string overwrites all settings listed under Current trace settings: and resets it to the default.

Extended

To enable trace settings for a longer period of time, that is, for more than one session, switch them on in the WebSphere Application Server configuration. Proceed by the following steps:

1. Access the WebSphere Integrated Solutions Console using this URL: http://hostname:port_number/ibm/console

2. Go to Servers > Server Types > WebSphere appservers.

3. Select the application server.

4. Click Troubleshooting > Change Log Detail Levels.

5. Specify the required trace settings. For example, this can be com.ibm.wps.command.credentialvault.*=finest

6. Save the updates.

7. Restart the WebSphere_Portal server.

8. To disable tracing, specify tracestring: *=info and restart the WebSphere_Portal server.

Change the log file name and location

We can change the locations of the log files by configuring them in the WebSphere Integrated Solutions Console. Go to Troubleshooting > Logs and Trace > server and select the logger type to change. In the configuration dialog change the path for the log file as required.

Change the language used in the log file

By default, information in the log file is written in the language that was used for the WebSphere Portal installation. However, because WebSphere Portal supports a number of languages, we can choose to have the log file information written in a language other than that used during installation.

To change the language used for the log file, edit the file log.properties. This file is located in the following WebSphere Portal directory:

• AIX Linux Solaris: WP_PROFILE/PortalServer/config/config

Add the following line:

locale=xx 

where xx is the two-letter abbreviation for the locale. For a list of the locale abbreviations used with WebSphere Portal, refer to Directories for languages. For example, to have log information generated in English, we would add the following line:

 locale=en 

Reference: Log file format

If the logs are written to the log file of WebSphere Portal and not redirected to the logging facility WebSphere Application Server, the log file consists of a sequence log records that are separated by blank lines.

The log records have the following format:

     timestamp classification classname method threadID
     messagecode: logmessage

Where:

• timestamp is the time (to the millisecond) when the log record was created.

• classification is one of the following letters:

  • E for error messages

  • W for warning messages

  • I for informational messages

  • l for traces (low details)

  • m for traces (medium details)

  • h for traces (high details)

• classname is the Java class containing the code that triggered the log event.

• method is the name of the Java method containing the code that triggered the log event.

• messagecode is a unique identifier for this message, to uniquely identify the specific message and refer to it when consulting documentation or support. The message code is only available for error, warning, or informational messages, and not for traces. It consists of:

  • a four-character identifier for the component that defines the message.

  • a four-digit number identifying the message in the component.

  • a one-letter classification code, which can be E, W, or I.

• logmessage is the actual log message describing the logged event. Error, warning, and informational messages are translated into the system locale. Trace messages are not translated.

• threadID is the identification of the thread that triggered the log event.

1. Traces are written only if the specific tracing facility is enabled; all other messages are written unconditionally.

2. The system locale is part of the general internationalization features of WebSphere Portal and can be configured via LocalizerService. For more information refer to the topics about Setting service configuration properties and about the Portal configuration services.

The following is an example of a log record:

2011.05.16 13:36:14.449 W com.ibm.wps.services.datastore.DataStoreServiceImpl init 0000003a
DSTO0063W: The transaction isolation level is not set to READ_COMMITTED.

The current value is TRANSACTION_REPEATABLE_READ.

Parent: Logging and tracing