JPA consumer in clustered FSW 6 environment - Red Hat Customer Portal

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Issue

There is a SwitchYard service that reads all unread posts from a database with a JPA binding. Users are setting a flag in the database to tell that a row is read. This service is used in a clustered environment, two servers behind a load balancer.
Is it possible that the two servers can read the same rows from the database?
Would it be possible to use `lockEntity to fix this kind of issue ? What is the downside to this?
Is there a recommended solution?

Environment

Red Hat JBoss Fuse Service Works (FSW)
- 6.0.0

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