Index-document-configuration tag not working


Installation for a custom jar completes successful and no error in logs and still the tag index-document-configuration is not working. It works sometimes and fails most of the time.
Its working most of the times(works 8/10 times) in one DC env with 2 nodes but not working(fails 9/10 times) in other DC env with 4 nodes.
If I understand correctly, this may be a problem with DC env, can anyone tell me where to start debugging in the env or plugin.

<index-document-configuration entity-key="IssueProperty" key="jira-issue-problem-indexing">
        <key property-key="sm">
            <extract path="test" type="string"/>