根据http://www.elasticsearch.org/tutorials/2011/08/22/elasticsearch-on-ec2.html上的文件，我已经包含了相应的 API 访问密钥 ID 及其秘密访问密钥，并且 Elasticsearch 能够写入 S3 存储桶，如下所示：
[2012-08-02 04:21:38,793][DEBUG][gateway.s3] [Schultz, Herman] writing to gateway org.elasticsearch.gateway.shared.SharedStorageGateway$2@4e64f6fe ...
[2012-08-02 04:21:39,337][DEBUG][gateway.s3] [Schultz, Herman] wrote to gateway org.elasticsearch.gateway.shared.SharedStorageGateway$2@4e64f6fe, took 543ms
但是，在将快照写入 S3 存储桶时，会出现以下错误：
[2012-08-02 04:25:37,303][WARN ][index.gateway.s3] [Schultz, Herman] [plumbline_2012.08.02][3] failed to read commit point [commit-i] java.io.IOException: Failed to get [commit-i]
Caused by: Status Code: 403, AWS Service: Amazon S3, AWS Request ID: E084E2ED1E68E710, AWS Error Code: InvalidAccessKeyId, AWS Error Message: The AWS Access Key Id you provided does not exist in our records.
[2012-08-02 04:36:06,696][WARN ][index.gateway] [Schultz, Herman] [plumbline_2012.08.02][0] failed to snapshot (scheduled) org.elasticsearch.index.gateway.IndexShardGatewaySnapshotFailedException: [plumbline_2012.08.02][0] Failed to perform snapshot (index files)
由于我提供的访问密钥能够写入元数据而不是创建快照，因此发生这种情况是否有原因？