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stephen o'donnell <stephen.odonnell@gmail.com> in hadoop

HDFS-14706. Checksums are not checked if block meta file is less than 7 bytes. Contributed by Stephen O'Donnell.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

(cherry picked from commit 7bebad61d9c3dbff81fdcf243585fd3e9ae59dde)

(cherry picked from commit 9c0d6e16573a055665318bce8f7d38a92c897393)

HDFS-14706. Checksums are not checked if block meta file is less than 7 bytes. Contributed by Stephen O'Donnell.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

(cherry picked from commit 7bebad61d9c3dbff81fdcf243585fd3e9ae59dde)

HDFS-14706. Checksums are not checked if block meta file is less than 7 bytes. Contributed by Stephen O'Donnell.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

HDFS-14617. Improve fsimage load time by writing sub-sections to the fsimage index (#1028). Contributed by Stephen O'Donnell.

Reviewed-by: He Xiaoqiao <hexiaoqiao@apache.org>