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  • Java


MilvusClient interface. This method transfers a query node from the source resource group to another resource group.

R<RpcStatus> transferReplica(TransferReplicaParam requestParam);


Use the TransferReplicaParam.Builder to construct a TransferReplicaParam object.

import io.milvus.param. TransferReplicaParam;
TransferReplicaParam.Builder builder =  TransferReplicaParam.newBuilder();

Methods of TransferReplicaParam.Builder:

Method Description Parameters
withSourceGroupName(String groupName) Sets the source group name. groupName cannot be empty or null. groupName: The name of the source group.
withTargetGroupName(String groupName) Sets the target group name. groupName cannot be empty or null. groupName: The name of the target group.
withCollectionName(String collectionName) Sets the collection name. Collection name cannot be empty or null. collectionName: The name of a collection.
withReplicaNumber(Long replicaNumber) Specify number of replicas to transfer. replicaNumber: The number of replicas to transfer.
build() Construct a TransferReplicaParam object. N/A

The can throw the following exceptions:

  • ParamException: error if the parameter is invalid.


This method catches all the exceptions and returns an R<RpcStatus> object.

  • If the API fails on the server side, it returns the error code and message from the server.

  • If the API fails by RPC exception, it returns R.Status.Unknown and error message of the exception.

  • If the API succeeds, it returns R.Status.Success.


import io.milvus.param.TransferReplicaParam;

R<RpcStatus> response = client.transferReplica(TransferReplicaParam.newBuilder()

if (response.getStatus() != R.Status.Success.getCode()) {
    throw new RuntimeException(response.getMessage());