fix: add json only if

Author: Devdutt Shenoi

src/handlers/http/cluster/mod.rs

@@ -89,20 +89,22 @@ pub async fn sync_streams_with_ingestors(
             base_path_without_preceding_slash(),
             stream_name
         );
-        let res = HTTP_CLIENT
+        let mut req = HTTP_CLIENT
             .put(url)
             .headers(reqwest_headers.clone())
-            .header(header::AUTHORIZATION, &ingestor.token)
-            .json(&static_schema)
-            .send()
-            .await
-            .map_err(|err| {
-                error!(
-                    "Fatal: failed to forward upsert stream request to ingestor: {}\n Error: {:?}",
-                    ingestor.domain_name, err
-                );
-                StreamError::Network(err)
-            })?;
+            .header(header::AUTHORIZATION, &ingestor.token);
+
+        if let Some(schema) = static_schema.as_ref() {
+            req = req.json(schema);
+        }
+
+        let res = req.send().await.map_err(|err| {
+            error!(
+                "Fatal: failed to forward upsert stream request to ingestor: {}\n Error: {:?}",
+                ingestor.domain_name, err
+            );
+            StreamError::Network(err)
+        })?;
 
         if !res.status().is_success() {
             error!(