ERROR: Bad Request;default/org.apache.falcon.FalconWebException::org.apache.falcon.FalconException: java.lang.RuntimeException: java.lang.IllegalStateException: Cluster entity vertex must exist

Somehow I started to get: ERROR: Bad Request;default/org.apache.falcon.FalconWebException::org.apache.falcon.FalconException: java.lang.RuntimeException: java.lang.IllegalStateException: Cluster entity vertex must exist

I did not find any solution from internet.

The solution helped me was to delete directory /hadoop/falcon/embeddedmq from falcon server and restart falcon server.

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