Log stream_write_to_fp ioerrors

storage/basestorage.py

@@ -1,8 +1,11 @@
+import logging
 import tempfile
 
 from digest.digest_tools import content_path
 from util.registry.filelike import READ_UNTIL_END
 
+logger = logging.getLogger(__name__)
+
 class StoragePaths(object):
   shared_images = 'sharedimages'
 
@@ -104,6 +107,7 @@ class BaseStorage(StoragePaths):
         out_fp.write(buf)
         bytes_copied += len(buf)
       except IOError:
+        logger.error('Failed to stream_write_to_fp: %s', err)
         break
 
     return bytes_copied