Can writes success when a Couchbase master node fails

Hello, I have a Java client writing to Couchbase using bucketObj.async().upsert(document). At some point, the master node fails and the client gets a TimeoutException. But the replica node is up.

java sdk version is 2.2.3

I wonder if there are any setting on the client/on the server side to allow the client to keep writing to replica in case of a master node failure.

I read PersistTo and ReplicaTo. It seems both require the master node is up.

@jzeng,

Writes to replicas in Couchbase are not allowed, since Couchbase is designed to favor consistency over availability. You can read from replicas, but not make changes to them.

If a node fails, you have some options for failover on the server side. You can manually failover a node, or you can set the cluster to have automatic failover. A failover will promote replicas to active, at which point you can start making changes to them.

For more information, check out the documentation on failover here: https://developer.couchbase.com/documentation/server/4.6/clustersetup/failover.html

If you want to know more about how to handle a failover situation in Java, I suggest posting in the Java category here: https://forums.couchbase.com/c/java-sdk