MySQL replication?

You must use the log-slave-updates option on B (app1 in your case) in a A -> B -> C configuration Normally, a slave does not log to its own binary log any updates that are received from a master server. This option tells the slave to log the updates performed by its SQL thread to its own binary log.

You must use the -log-slave-updates option on B (app1 in your case) in a A -> B -> C configuration. Normally, a slave does not log to its own binary log any updates that are received from a master server. This option tells the slave to log the updates performed by its SQL thread to its own binary log.

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