Agent discovery not working for ACC for linux and host didn't populateIssue Agent client collectors installed on different Linux host machine that the host field isn't getting populated and discovery isn't working. CauseThere is Identification error in syslog ie: identification_engine : REQUIRED_ATTRIBUTE_EMPTY Missing mandatory field [kernel_release] in table [cmdb_ci_linux_server]. Add input value for mandatory field in payload identification_engine : logId:[ed7912681be3a4107db8ec61ec4bcb2a] Output = {"items":[{"className":"cmdb_ci_linux_server","sysId":"Unknown","identifierEntrySysId":"Unknown","errors":[{"error":"REQUIRED_ATTRIBUTE_EMPTY","message":"Missing mandatory field [kernel_release] in table [cmdb_ci_linux_server] cmdb_ci_linux_server has mandatory field set to column "kernal_release". Since Agent client collector does not populate this data, CI insertion is failing.Resolution1) Change mandatory=false or untick the "mandatory" for the field "kernel_release" on the "cmdb_ci_linux_server" table. 2. Restart the agent. ie: systemctl stop accsystemctl start acc