a36274d699
Contributed by Ben Roling. S3Guard will now track the etag of uploaded files and, if an S3 bucket is versioned, the object version. You can then control how to react to a mismatch between the data in the DynamoDB table and that in the store: warn, fail, or, when using versions, return the original value. This adds two new columns to the table: etag and version. This is transparent to older S3A clients -but when such clients add/update data to the S3Guard table, they will not add these values. As a result, the etag/version checks will not work with files uploaded by older clients. For a consistent experience, upgrade all clients to use the latest hadoop version.
For the latest information about Hadoop, please visit our website at: http://hadoop.apache.org/ and our wiki, at: http://wiki.apache.org/hadoop/ This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See <http://www.wassenaar.org/> for more information. The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this Apache Software Foundation distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code. The following provides more details on the included cryptographic software: Hadoop Core uses the SSL libraries from the Jetty project written by mortbay.org. Hadoop Yarn Server Web Proxy uses the BouncyCastle Java cryptography APIs written by the Legion of the Bouncy Castle Inc.