Communication Issues Between Cnm And Db2 - IBM Power Systems 775 Manual

4.2.2 Communication issues between CNM and DB2

Monitoring the /var/opt/isnm/cnm/log/eventSummary.log file is a quick and effective way to
identify potential problems with CNM communications or general configuration issues. This
feature is demonstrated throughout this chapter. The following high-level steps are used to
debug the CNM startup sequence:
1. Identify that there is an issue via the /var/opt/isnm/cnm/log/eventSummary.log file.
2. Isolate the cause of the problem and make the necessary changes.
3. Recycle CNM by issuing chnwm -d and then chnwm -a.
4. Check the /var/opt/isnm/cnm/log/eventSummary.log to see whether CNM starts without
errors, as shown in Example 4-7.
Example 4-7 Checking /var/opt/isnm/cnm/log/eventSummary.log for problems
# tail /var/opt/isnm/cnm/log/eventSummary.log
13:19:23.283143 cnm_glob.cpp:1031: CNM Daemon is starting now
13:19:24.485371 cnm_glob.cpp:261: Unable to Connect to XCATDB
13:19:24.490633 cnm_glob.cpp:277: Unable to get configuration parameters from
isnm_config table
13:19:24.492224 cnm_glob.cpp:313: Unable to get cluster information from XCATDB
This section illustrates some scenarios of errors reported when CNM is started. One reason
for these messages might be a missing parent entry in the PPC table. If the parent entry is
missing, we check the PPC table for missing parents, as shown in Example 4-8.
Example 4-8 Using the nodels command to check for missing parents in the PPC table
# nodels all ppc.parent -S
40.6.0.1: frame06
40.6.0.2: frame06
40.6.1.1: f06cec01
40.6.1.2: f06cec01
40.6.10.1: f06cec10
40.6.10.2: f06cec10
40.6.11.1: f06cec11
40.6.11.2: f06cec11
40.6.12.1: f06cec12
40.6.12.2: f06cec12
40.6.2.1: f06cec02
40.6.2.2: f06cec02
40.6.3.1: f06cec03
40.6.3.2: f06cec03
40.6.4.1: f06cec04
40.6.4.2: f06cec04
40.6.5.1: f06cec05
40.6.5.2: f06cec05
40.6.6.1: f06cec06
40.6.6.2: f06cec06
40.6.7.1: f06cec07
40.6.7.2: f06cec07
40.6.8.1: f06cec08
40.6.8.2: f06cec08
40.6.9.1: f06cec09
40.6.9.2: f06cec09
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IBM Power Systems 775 for AIX and Linux HPC Solution