diff --git a/ryu/ofproto/ofproto_parser.py b/ryu/ofproto/ofproto_parser.py
index 371cf3f1..3b884400 100644
--- a/ryu/ofproto/ofproto_parser.py
+++ b/ryu/ofproto/ofproto_parser.py
@@ -21,6 +21,7 @@ import sys
 import functools
 
 from ryu import exception
+from ryu import utils
 from ryu.lib import stringify
 
 from . import ofproto_common
@@ -51,7 +52,15 @@ def msg(datapath, version, msg_type, msg_len, xid, buf):
     if msg_parser is None:
         raise exception.OFPUnknownVersion(version=version)
 
-    return msg_parser(datapath, version, msg_type, msg_len, xid, buf)
+    try:
+        return msg_parser(datapath, version, msg_type, msg_len, xid, buf)
+    except struct.error:
+        LOG.exception(
+            'Encounter an error during parsing OpenFlow packet from switch.'
+            'This implies switch sending a malfold OpenFlow packet.'
+            'version 0x%02x msg_type %d msg_len %d xid %d buf %s',
+            version, msg_type, msg_len, xid, utils.bytearray_to_hex(buf))
+        raise
 
 
 def create_list_of_base_attributes(f):
diff --git a/ryu/utils.py b/ryu/utils.py
index 1e1aa490..1889257b 100644
--- a/ryu/utils.py
+++ b/ryu/utils.py
@@ -94,7 +94,13 @@ def round_up(x, y):
 
 
 def hex_array(data):
-    return ' '.join(hex(ord(chr)) for chr in data)
+    """Convert string into array of hexes to be printed."""
+    return ' '.join(hex(ord(char)) for char in data)
+
+
+def bytearray_to_hex(data):
+    """Convert bytearray into array of hexes to be printed."""
+    return ' '.join(hex(byte) for byte in data)
 
 
 # the following functions are taken from OpenStack