S03002

Error Code

S03002

Error Message

Subscription to table <xxx> already exists on this node. Change an actionName or cancel the existing subscription first. RefId:S03002

Probable Causes

This error occurs upon repetitive subscription topics. Supposing there is a subscription named a to a table b on a certain node. When users create another subscription with the same name a to a table also named b, the aforementioned error is reported.

Specifically, when using the subscribeTable function, it returns a unique subscription topic consisting of the hostname, port, alias of the node where the stream table is located, stream table name, and the subscription task name.

Solutions

• Choose another name for the stream table.

• Change the actionName parameter in subscribeTable.

• Cancel the existing subscription with the same name.

Note: For high-availability subscriptions, the following warning message may be logged when the DolphinDB client initiates reconnection: This dolphindb client has already subscribed to the table <xxx>. RefId:S03002. It indicates that this client has subscribed to the table in other ways and no additional processing is required.