dragon created HDFS-10049:
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Summary: CLONE - Fix
DFSStripedOutputStream#getCurrentBlockGroupBytes when the last stripe is at the
block group boundary
Key: HDFS-10049
URL: https://issues.apache.org/jira/browse/HDFS-10049
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: dragon
Assignee: Jing Zhao
Fix For: HDFS-7285
Currently {{DFSStripedOutputStream#getCurrentBlockGroupBytes}} simply uses
{{getBytesCurBlock}} of each streamer to calculate the block group size. This
is wrong when the last stripe is at the block group boundary, since the
{{bytesCurBlock}} is set to 0 if an internal block is finished.
For example, when the real block size is {{blockGroupSize - cellSize *
(numDataBlocks - 1)}}, i.e., the first internal block is full while the others
are not, the {{getCurrentBlockGroupBytes}} returns wrong result and cause the
write to fail.
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