diff --git a/pybtc/connector/block_loader.py b/pybtc/connector/block_loader.py
index d0dbb78..9ca9c57 100644
--- a/pybtc/connector/block_loader.py
+++ b/pybtc/connector/block_loader.py
@@ -53,6 +53,7 @@ class BlockLoader:
                 if not self.worker_busy[i]:
                     self.worker_busy[i] = True
                     try:
+                        self.log.warning("<<<<<")
                         self.pipe_sent_msg(self.worker[i].writer, b'get', batch)
                     finally:
                         self.worker_busy[i] = False