Specify Server URLs

When a server connection is lost during an unshared state failover, clients attempt to reconnect to the second server. To enable a client to reconnect, you must specify the URLs of both servers when creating a connection.

• Unshared State

  Specify multiple servers as a list of URLs separated by plus (+) signs. For example, to identify the first server as tcp://server0:7222, and the second server as tcp://server1:7344, you can specify:

     serverUrl=tcp://server0:7222+tcp://server1:7344

• Dual State

  To combine shared state server pairs with unshared state servers, use commas to separate the servers that share state, and plus (+) signs to separate servers that do not share state. For example, this line specifies server a1 and a2 as a fault-tolerant pair that share state, and servers b1 and b2 as a second pair with shared state:

  serverUrl=tcp://a1:8222,tcp://a2:8222+tcp://b1:8222,tcp://b2:8222

  Note that a1 and a2 do not share state with b1 and b2.

The client attempts to connect to each URL in the order listed. If a connection to one URL fails, the client tries the next URL in the list. The client tries the URLs in sequence until all URLs have been tried. If the first failed connection was not the first URL in the list, the attempts wrap to the start of the list (so each URL is tried). If none of the attempts succeed, the connection fails.