While running Vcenter discovery duplicate network adapters are created with no link to parent CI - Support and Troubleshooting

While running Vcenter discovery duplicate network adapters are created with no link to parent CI Issue  Symptoms While running Vcenter discovery duplicate network adapters are created with no link to parent CI.

Discovery log warnings:

Multiple Guest CI's existing on this VM instance. serial_number 42 12 8e 43 32 ab 3c xx xx xx xx xx, Mac addresses: 00:50:5X:XX:e9:8f

Release All releases

Steps to reproduce 01) Run a Vcenter discovery.

02) Check if it is creating duplicate records in the table [cmdb_ci_vmware_nic] with no configuration item record.

03) Also check if you have below error messages from the discovery logs.

Multiple Guest CI's existing on this VM instance. serial_number 42 12 8e 43 32 ab 3c xx xx xx xx xx, Mac addresses: 00:50:5X:XX:e9:8f

Cause The issue is caused due to the existing duplicate records in the [cmdb_ci_computer] table & empty mac_address field in the computer CI record.

The script include VmwareVmCorrelator below handles this logic: /sys_script_include.do?sys_id=8dddde336730120072b9f06943415ad8

Read script lines: //282 to 290 if (JSUtil.nil(guestCiSysId)) return;

if (duplicateCIs.length > 1) throw { "error": "VMCorrelator.DuplicateGuestsFound", "msg": "Multiple Guest CI's existing on this VM instance. serial_number " + serial + ", Mac addresses: " + macs, "duplicateCis": duplicateCIs };

Investigating further, discovery is considering duplicateCIs in the table (cmdb_ci_computer).

Script lines : //244 to 246 var guestGr = new GlideRecord('cmdb_ci_computer'); guestGr.addQuery('serial_number', ['zone-' + serial, 'vmware-' + serial]); guestGr.query();

Resolution To resolve the issue, make sure that you don't have any duplicates in the computer records with empty MAC address records.