IBM Support

MustGather: Metric Server problems for Edge Load Balancer

Troubleshooting


Problem

Collecting data for Metric Server problems with the IBM WebSphere® Application Server Load Balancer. Before engaging IBM support, review this information to familiarize yourself with the troubleshooting process. 

Resolving The Problem

If IBM support is engaged with your problem, continue problem determination as requested by the support representative.
 

Problem Determination:
Metric server load is reported in the fourth column (System / SYS) of the Load Balancer's manager report. If the system value is "-1", then the server is either down or Load Balancer is not receiving valid metrics from the Metric Server agent configured on the server.
Self-Help:
Review the "Setting up a Metric Server" information and confirm you followed the proper procedure and distributed the correct keys to authorize communication with the metric agent.
MustGather data collection:
If your server is working, then review logs from the suspect Metric Server machine (Load Balancer) and also the metric agent processes.
  • Increase metric log level and log size on the Load Balancer:
    • Modify the "Metric logging level" and the "Maximum metric log size" settings on the manager's configuration settings in the graphical interface (lbadmin)
      -- OR --
    • Increase metric logging level and metric log size with the command-line interface (dscontrol): 
      dscontrol manager set metric loglevel 5
dscontrol manager set metric logsize unlimited

  • Increase the metricserver agent logging on the server machines:
    1. Stop the metric server with the following command:
      metricserver stop
    2. Edit the metricserver script. Modify the LOG_LEVEL and LOG_SIZE values: 
      set LOG_LEVEL=5 
set LOG_SIZE=unlimited
    3. Start the metric server with the following command:
      metricserver
 
Data to provide:
Collect the following data to provide to IBM:
  • netstat -an (from all machines)
  • dscontrol manager report
  • dscontrol file save <pmr#>.cfg
  • dscontrol metric status [cluster@]metric
  • metricmonitor.log
  • manager.log
  • server.log  
  • Agent.log (located in the install_root/ms/logs directory of the server machines)

For a listing of all technotes, downloads, and educational materials specific to the Edge component, Load Balancer, search the WebSphere Application Server support site.

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Document Information

Modified date:
14 June 2020

UID

swg21141087

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