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ERROR: "/etc/sysconfig/network has the same entry as that of "hostname -f" [FAILED]" while starting Informatica Cluster Service
Problem Description
Informatica Cluster Service fails during startup with the following error:

"com.infa.products.ihs.service.exception.InfaHadoopServiceException: [InfaHadoopServiceException_00025] Prevalidation check failed for 'CLUSTER_SERVER <hostname> ' with error [ =======================================================================
The following prevalidations on <hostname> have failed :
ERROR :/etc/sysconfig/network has the same entry as that of "hostname -f" [FAILED]:

Cause
This error occurs due to the failure of one of the pre-validation checks.

For an internal cluster, a fully qualified hostname should be specified in the /etc/sysconfig/network file and it should match with the value of hostname -f command.
Solution
To resolve this issue, ensure that the /etc/sysconfig/network file includes the same entry as the value of hostname -f command.
More Information
​In the latest patches of Red Hat Enterprise Linux, the use of the global /etc/sysconfig/network file is deprecated. Due to this, the IHS is fails with a pre-validation error. 

As a workaround, skip this pre-validation check by removing the following lines in the $INFA_HOME/services/InfaHadoopService/Binaries/PrevalidationCommands.json file. Take a backup of this file before making any changes.

"{
        "command": " find /etc/sysconfig/network -maxdepth 0 -type f -readable ",
        "outputDataType": "",
        "outputValue": "",
        "checkOperation": "",
        "hostType": "CLUSTER",
        "isEnabled": "true",
        "impact": "FAILURE",
        "hasChildCommand":"true",
        "runChildCommandOn":"SUCCESS",
        "childCommand":{
                "command": "\\\" fqdn=\\\\\\$(hostname -f) ; grep -i -x .*HOSTNAME.*=.*\\\\\\$fqdn /etc/sysconfig/network ; \\\"",
                "outputDataType": "",
                "outputValue": "",
                "checkOperation": "",
                "hostType": "CLUSTER",
                "isEnabled": "true",
                "impact": "FAILURE",
                "beforeCheckMessage": "Checking if /etc/sysconfig/network has the same entry as that of \"hostname -f\"",
                "successMessage": "/etc/sysconfig/network has the same entry as that of \"hostname -f\" [SUCCESS] ",
                "failureMessage": "/etc/sysconfig/network does not have the same entry as that of \"hostname -f\" [FAILED] ",
                "conditions": "",
                "description": "/etc/sysconfig/network has the same entry as that of \"hostname -f\" "
        },"


A CR with reference number EIC-21070 has already been raised to address this issue in future releases.

The CR can be tracked using the following link. https://network.informatica.com/community/informatica-network/cr
Applies To
Product: Enterprise Data Catalog
Problem Type: Configuration
User Type: Administrator
Project Phase: Configure
Product Version: Enterprise Data Catalog 10.2.1; Enterprise Data Catalog 10.2.1 Update 1
Database:
Operating System:
Other Software:

Reference
Attachments
Last Modified Date:1/13/2020 12:17 AMID:566757
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