This documentation is for WSO2 API Manager 1.10.0 View documentation for the latest release.
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When you run multiple instances of the API Manager in distributed mode, the Gateway and Key Manager (used for validation and authentication) can run on two different JVMs. When the API Gateway receives API invocation calls, it contacts the API Key Manager service for verification (given that caching is not enabled at the Gateway level). Communication between API Gateway and Key Manager happens in either of the following ways: