Prod Turso failing with `you are using a client with a deprecated version of sync`

[aminya]

I've been using Turso db, and one of the databases has started to give this error.

libsql::replication::remote_client] Failed handshake in 87 ms: Client(Status { code: Unimplemented, message: "you are using a client with a deprecated version of sync, that is not supported in this platform. Please upgrade your client", metadata: MetadataMap { headers: {"content-type": "application/grpc-web-text", "date": "xxx", "fly-request-id": "xxx", "content-length": "0", "server": "xxx", "via": "1.1 fly.io"} }, source: None })

I have upgraded the Rust libsql client to the latest (0.9.19), but I still get the same error.

  let db = Builder::new_remote_replica(
    ldb_path,
    DATABASE_URL,
    DATABASE_AUTH_TOKEN,
  )
  .sync_interval(Duration::from_secs(300))
  .build()
  .await?;

  db.sync().await?;

It's not clear what is deprecated as I've been using the default Rust client settings, and I could not find any API deprecation. I could not also find the error message in the source code of libsql.

[aminya]

I have fixed the issue by passing .sync_protocol(SyncProtocol::V2) before the build.

  let db = Builder::new_remote_replica(
    ldb_path,
    DATABASE_URL,
    DATABASE_AUTH_TOKEN,
  )
  .sync_interval(Duration::from_secs(300))
  .sync_protocol(SyncProtocol::V2)
  .build()
  .await?;

  db.sync().await?;

I also faced another breaking change in the upgrade caused by the addition of block_in_place, which doesn't work under Actix. I had to separate the db initialization out of the actix main and create my custom main which initializes the db first in a multi-threaded Tokio runtime and then passes it to Actix. https://github.com/tursodatabase/libsql/pull/2029

[levydsa]

@aminya If you enable trace level logs, you will see some "Probing for sync protocol ..." messages. Can you share what those look like for you using SyncProtocol::Auto?

[aminya]

I was using the auto sync protocol as it's the default. I was on version 0.9.6 before that, which prompted me to upgrade. I can try to get the logs if it helps.