webMethods API Gateway Q&A - Upgrading API Gateway cluster fails at migrate.sh step

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Product/components used and version/fix level:

Upgrading an API Gateway cluster from 10.5 to 10.11.
The source cluster consists of three nodes: qa-01, qa-02, qa-03, and the target cluster consists of qa-04, qa-05, qa-06.

Detailed explanation of the problem:

Following the upgrading API Gateway cluster section from the following guide: https://documentation.softwareag.com/webmethods/api_gateway/yai10-11/10-11_Api_Gateway_Upgrade_Guide.pdf

Running this command on qa-05. /var/tmp/config.properties, the file was copied from …/local/apps/webM/APIGateway/IntegrationServer/instances/API/packages/WmAPIGateway/config/resources/elasticsearch dir.

Error messages / full error message screenshot / log file:

./migrate.sh datastore -dstoreSrc /var/tmp/config.properties command failed with the following errors:

Error while reindexing APIs. Error type - illegal_argument_exception, reason [phx-wmgateqa-03:9240] not whitelisted in reindex.remote.whitelist

Data store migration failed

Reason - Error while reindexing APIs. Error type - illegal_argument_exception, reason [phx-wmgateqa-03:9240] not whitelisted in reindex.remote.whitelist

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There are two steps that will help resolve this issue.

The following must be defined in the elasticsearch.yml on ALL the target cluster elasticsearch nodes.

reindex.remote.whitelist: <source>:<port>

The “default” Integration Server instance names were not used in the source or target nodes. The migrate command was modified to use the IS instance names.
Example:

./migrate.sh datastore -dstoreSrc /var/tmp/config.properties -reindex -indicesType core  -instanceName <source instance name> -newInstanceName <target instance name>