diff --git a/nvflare/fuel/f3/streaming/blob_streamer.py b/nvflare/fuel/f3/streaming/blob_streamer.py
index 53a7075981..e3ba9ab11c 100644
--- a/nvflare/fuel/f3/streaming/blob_streamer.py
+++ b/nvflare/fuel/f3/streaming/blob_streamer.py
@@ -109,10 +109,17 @@ def _read_stream(blob_task: BlobTask):
                     break
 
                 length = len(buf)
-                if blob_task.pre_allocated:
-                    blob_task.buffer[buf_size : buf_size + length] = buf
-                else:
-                    blob_task.buffer.append(buf)
+                try:
+                    if blob_task.pre_allocated:
+                        blob_task.buffer[buf_size : buf_size + length] = buf
+                    else:
+                        blob_task.buffer.append(buf)
+                except Exception as ex:
+                    log.error(
+                        f"memory view error: {ex} "
+                        f"Debug info: {length=} {buf_size=} {len(blob_task.pre_allocated)=} {type(buf)=}"
+                    )
+                    raise ex
 
                 buf_size += length
 
@@ -129,7 +136,7 @@ def _read_stream(blob_task: BlobTask):
             blob_task.future.set_result(result)
         except Exception as ex:
             log.error(f"Stream {blob_task.future.get_stream_id()} read error: {ex}")
-            log.debug(secure_format_traceback())
+            log.error(secure_format_traceback())
             blob_task.future.set_exception(ex)
 
 
diff --git a/nvflare/private/aux_runner.py b/nvflare/private/aux_runner.py
index be7bc8d436..a808652d10 100644
--- a/nvflare/private/aux_runner.py
+++ b/nvflare/private/aux_runner.py
@@ -132,6 +132,11 @@ def dispatch(self, topic: str, request: Shareable, fl_ctx: FLContext) -> Shareab
         Returns: reply message
 
         """
+
+        if not isinstance(request, Shareable):
+            self.log_error(fl_ctx, f"received invalid aux request: expects a Shareable but got {type(request)}")
+            return make_reply(ReturnCode.BAD_REQUEST_DATA)
+
         peer_props = request.get_peer_props()
         if peer_props:
             peer_ctx = FLContext()