[refer #439] Correctly handle LSN parameter in BASEBACKUP command

walkeeper/src/receive_wal.rs

@@ -299,6 +299,7 @@ impl<'pg> ReceiveWalConn<'pg> {
         this_timeline.get().set_info(&my_info);
         /* Need to persist our vote first */
         this_timeline.get().save_control_file(true)?;
+        this_timeline.get().set_info(&my_info);
 
         let mut flushed_restart_lsn = Lsn(0);
         let wal_seg_size = server_info.wal_seg_size as usize;

walkeeper/src/replication.rs

@@ -76,8 +76,12 @@ impl ReplicationConn {
                     let feedback = HotStandbyFeedback::des(&m)?;
                     subscriber.add_hs_feedback(feedback);
                 }
+                FeMessage::Sync => {}
+                FeMessage::CopyFailed => {
+                    return Err(anyhow!("Copy failed"))
+                }
                 _ => {
-                    // We only handle `CopyData` messages. Anything else is ignored.
+                    // We only handle `CopyData`, 'Sync', 'CopyFailed' messages. Anything else is ignored.
                     info!("unexpected message {:?}", msg);
                 }
             }