[jira] [Created] (HDDS-2259) Container Data Scrubber computes wrong checksum

["Attila Doroszlai (Jira)" <ji...@apache.org>]

Attila Doroszlai created HDDS-2259:
--------------------------------------

             Summary: Container Data Scrubber computes wrong checksum
                 Key: HDDS-2259
                 URL: https://issues.apache.org/jira/browse/HDDS-2259
             Project: Hadoop Distributed Data Store
          Issue Type: Sub-task
          Components: Ozone Datanode
    Affects Versions: 0.5.0
            Reporter: Attila Doroszlai
            Assignee: Attila Doroszlai


Chunk checksum verification fails for (almost) any file.  This is caused by computing checksum for the entire buffer, regardless of the actual size of the chunk.

{code:title=https://github.com/apache/hadoop/blob/55c5436f39120da0d7dabf43d7e5e6404307123b/hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/keyvalue/KeyValueContainerCheck.java#L259-L273}
            byte[] buffer = new byte[cData.getBytesPerChecksum()];
...
                v = fs.read(buffer);
...
                bytesRead += v;
...
                ByteString actual = cal.computeChecksum(buffer)
                    .getChecksums().get(0);
{code}



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