The High Performance Extensibility Logs (HPEL) can be viewed in the WebSphere admin console or on the command line. To view the HPEL logs in the admin console, navigate to Troubleshooting > Logs and trace > select a server or node agent > View HPEL logs and trace. To view the HPEL logs on the command line, you can use any text editor to view the text.log. The LogViewer command must be used to view the HPEL log and HPEL trace log, because these logs are in binary format.

• logViewer.bat (Windows) 
• logViewer.sh (Linux WAS)
• logViewer (Linux Liberty) 

If you attempt to run the logViewer command outside of the profile directory, such as was_home/bin/logViewer.sh, the -repositoryDir option must be included.

~]# was_home/bin/logViewer.sh -repositoryDir was_home/profiles/your_profile/logs/your_app_server/

It is usually much easier to run the logViewer command from the profile directory.

~]# was_home/profiles/profile01/bin/logViewer.sh
[3/14/18 20:13:23:123 CDT] 0000009f ServletWrappe I com.ibm.webcontainer.servlet.ServletWrapper init SRV0242EI: [Beta_war] [/beta] [com.main.servlet.Results]: Initialization successful. 

Watch the log in real time

The -monitor option can be used to watch event written to the log in real time.

~]# was_home/profile/your_profile/bin/logViewer.sh -monitor

Redirect to text file

The -outLog option can be used to redirect the output of the logViewer command to a text file. Keep in mind that if you have not disabled the HPEL text log, the text.log should contain the same events as being produced by logViewer, so there are situations where you don't necessarily have to use the -outLog option.

~]# was_home/profile/your_profile/bin/logViewer.sh -outLog /tmp/file1.txt

Filter date and time

The -startDate and -stopDate option can be used to filter the log to only show events in a certain date and time range.

~]# was_home/profile/your_profile/bin/logViewer.sh -startDate "01/01/2018 09:00:00:000 CDT" -stopDate "01/01/2018 10:00:00:000 CDT"

Set log level

The possible log levels are FINE, FINER, FINEST, DETAIL, CONFIG, INFO, AUDIT, WARNING, SEVERE, FATAL.

The -level option can be used to only display events at a certain log level.

~]# was_home/profile/your_profile/bin/logViewer.sh -level FINE

The -minLevel and -maxLevel options can be used to specify the minimum and maximum log level, so that only events within certain log level are displayed.

~]# was_home/profile/your_profile/bin/logViewer.sh -minLevel WARNING -maxLevel INFO