diff --git a/cadence/activity_loop.py b/cadence/activity_loop.py
index b0cdcce..12c8991 100644
--- a/cadence/activity_loop.py
+++ b/cadence/activity_loop.py
@@ -38,7 +38,8 @@ def activity_task_loop(worker: Worker):
                 return
             except Exception as ex:
                 logger.error("PollForActivityTask error: %s", ex)
-                continue
+                logger.error(f"Exiting")
+                break
             if err:
                 logger.error("PollForActivityTask failed: %s", err)
                 continue
diff --git a/cadence/connection.py b/cadence/connection.py
index 973e89c..f6253d2 100644
--- a/cadence/connection.py
+++ b/cadence/connection.py
@@ -356,4 +356,4 @@ def call_function(self, call: ThriftFunctionCall) -> ThriftFunctionResponse:
                 raise Exception("Unexpected type: " + Frame.TYPE)
             assert isinstance(frame, FrameWithArgs)
             response.process_frame(frame)
-        return response
+        return response
\ No newline at end of file
diff --git a/cadence/ioutils.py b/cadence/ioutils.py
index a96eb2f..458f164 100644
--- a/cadence/ioutils.py
+++ b/cadence/ioutils.py
@@ -1,8 +1,10 @@
 from select import select
 from socket import socket
 from typing import IO, Callable
+import logging
 
 
+logger = logging.getLogger(__name__)
 class IOWrapper:
     def __init__(self, io_stream: IO, socket_: socket = None):
         self.io_stream = io_stream
@@ -27,6 +29,9 @@ def read_or_eof(self, size, field):
             self.socket.settimeout(timeout)
         buf: bytes = self.io_stream.read(size)
         if len(buf) != size:
+            logger.info(f"buffer content bytes: {buf}")
+            logger.info(f"buffer size: {len(buf)}")
+            logger.info(f"size: {size}")
             raise EOFError(field)
         return buf
 
diff --git a/cadence/workflow.py b/cadence/workflow.py
index be570a8..1885935 100644
--- a/cadence/workflow.py
+++ b/cadence/workflow.py
@@ -208,7 +208,7 @@ def exec_workflow(workflow_client, wm: WorkflowMethod, args, workflow_options: W
     start_request = create_start_workflow_request(workflow_client, wm, args)
     start_response, err = workflow_client.service.start_workflow(start_request)
     if err:
-        raise Exception(err)
+        raise Exception(repr(err))
     execution = WorkflowExecution(workflow_id=start_request.workflow_id, run_id=start_response.run_id)
     stub_instance._execution = execution
     return WorkflowExecutionContext(workflow_type=wm._name, workflow_execution=execution)