We are seeing failures within the Datastore Admin Scheduled Backup Tool 
across a number of our applications - perhaps coinciding with the 1.8.0 
push? Our cost increase started midway through May 3.

It looks like our backups are continuing forever, leading to pretty 
substantial increases in costs on datastore reads.

Stacktrace below. Is anyone else seeing this? You have to look in to your 
ah-builtin-python-bundle to see them.


   W2013-05-06 10:13:52.068Task 15812012600857BDDF6B8-0-14 is ahead of 
   ShardState 13. Waiting for it to catch up.
   
   
   E2013-05-06 10:13:52.068Raise an error to trigger retry.
   Traceback (most recent call last):
    File 
   
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/_webapp25.py"
   , line 716, in __call__
    handler.post(*groups)
    File 
   
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/mapreduce/base_handler.py"
   , line 83, in post
    self.handle()
    File 
   
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/mapreduce/handlers.py"
   , line 324, in handle
    if not self._try_acquire_lease(shard_state, tstate):
    File 
   
"/base/python_runtime/python_lib/versions/1/google/appengine/ext/mapreduce/handlers.py"
   , line 183, in _try_acquire_lease
    raise errors.RetrySliceError("Raise an error to trigger retry.")
   RetrySliceError: Raise an error to trigger retry.
   1. 
   
   
   

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