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https://issues.apache.org/jira/browse/HDFS-10460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341410#comment-15341410
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Kai Zheng commented on HDFS-10460:
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In the following change, requestedNumBytes should be actualNumBytes, right.
{code}
void checksumBlocks() throws IOException {
private boolean checksumBlockGroup(
LocatedStripedBlock blockGroup) throws IOException {
ExtendedBlock block = blockGroup.getBlock();
+ long requestedNumBytes = block.getNumBytes();
if (getRemaining() < block.getNumBytes()) {
block.setNumBytes(getRemaining());
}
- setRemaining(getRemaining() - block.getNumBytes());
+ setRemaining(getRemaining() - requestedNumBytes);
{code}
> Erasure Coding: Recompute block checksum for a particular range less than
> file size on the fly by reconstructing missed block
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-10460
> URL: https://issues.apache.org/jira/browse/HDFS-10460
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Rakesh R
> Assignee: Rakesh R
> Attachments: HDFS-10460-00.patch, HDFS-10460-01.patch
>
>
> This jira is HDFS-9833 follow-on task to address reconstructing block and
> then recalculating block checksum for a particular range query.
> For example,
> {code}
> // create a file 'stripedFile1' with fileSize = cellSize * numDataBlocks =
> 65536 * 6 = 393216
> FileChecksum stripedFileChecksum = getFileChecksum(stripedFile1, 10, true);
> {code}
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