replication slave timeout when receiving the initial bulk data set to 3600 seconds, now that replication is non-blocking the server must save the db before to start the async replication and this can take a lot of time with huge datasets

redis.c

@@ -3862,7 +3862,7 @@ static int syncWithMaster(void) {
         return REDIS_ERR;
     }
     /* Read the bulk write count */
-    if (syncReadLine(fd,buf,1024,5) == -1) {
+    if (syncReadLine(fd,buf,1024,3600) == -1) {
         close(fd);
         redisLog(REDIS_WARNING,"I/O error reading bulk count from MASTER: %s",
             strerror(errno));