Amazon S3 La chiave specificata non esiste dopo il successo get_key

Question

Sto usando Python e boto

questo è il mio codice:

key = bucket.get_key(key_name) 
if not key: 
    print 'error, key does not exist' 
    return 
data = key.get_contents_as_string() 

volte (compare casualmente) ottengo questa eccezione:

S3ResponseError: S3ResponseError: 404 Not Found

NOTA: il file viene caricato da un server e immediatamente dopo un altro server (situato in un altro continente) esegue il codice sopra.

il traceback:

Traceback (most recent call last): File "/test.py", line 222, in _process_response

data = key.get_contents_as_string() File "/usr/lib/python2.6/site-packages/boto-2.1.1-py2.6.egg/boto/s3/key.py",

line 1201, in get_contents_as_string response_headers=response_headers) File "/usr/lib/python2.6/site-packages/boto-2.1.1-py2.6.egg/boto/s3/key.py",

line 1093, in get_contents_to_file response_headers=response_headers) File "/usr/lib/python2.6/site-packages/boto-2.1.1-py2.6.egg/boto/s3/key.py",

line 996, in get_file override_num_retries=override_num_retries) File "/usr/lib/python2.6/site-packages/boto-2.1.1-py2.6.egg/boto/s3/key.py",

line 211, in open override_num_retries=override_num_retries) File "/usr/lib/python2.6/site-packages/boto-2.1.1-py2.6.egg/boto/s3/key.py",

line 165, in open_read self.resp.reason, body) S3ResponseError: S3ResponseError: 404 Not Found

NoSuchKey The specified key does not exist.key_nameidhost_id

in modo da ottenere la chiave, ma poi quando provo e leggere da esso ottengo 'non trovato'. qualche idea?

Answer 1

Questo è il comportamento previsto, secondo Amazon S3 developer guide:

... However, information about the changes might not immediately replicate across Amazon S3 and you might observe the following behaviors: A process writes a new object to Amazon S3 and immediately attempts to read it. Until the change is fully propagated, Amazon S3 might report "key does not exist."