[HBASE-25115] HFilePrettyPrinter can't seek to the row which is the first row of a hfile

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.6
• Fix Version/s: 3.0.0-alpha-1, 2.3.3, 2.4.0, 2.2.7
• Component/s: HFile, tooling
• Hadoop Flags: Reviewed
• Assignee: Yulin Niu
• Reporter: Chaoqiang Zhong
• Created: 29/Sep/20 08:02
• Updated: 06/Oct/20 09:26
• Resolved: 04/Oct/20 10:55

Description

This issue can be reproduced by below steps:

• make a hfile contains two rows '000' and '001';

D:\bin>hbase hfile -p -f /hbase/data/default/test2/df76e4acab5398e70be332f6807ec3ba/f1/fda213c556d540a58d29d6bd85931dcd
K: 000/f1:a/1601282789548/Put/vlen=4/seqid=4 V: aaaa
K: 001/f1:a/1601282792779/Put/vlen=4/seqid=5 V: aaaa
Scanned kv count -> 2

• '001' can be seeked to;

D:\bin>hbase hfile -e -w 001 -f /hbase/data/default/test2/df76e4acab5398e70be332f6807ec3ba/f1/fda213c556d540a58d29d6bd85931dcd
K: 001/f1:a/1601282792779/Put/vlen=4/seqid=5
Scanned kv count -> 1

• but '000' can't be seeked to;

D:\bin>hbase hfile -e -w 000 -f /hbase/data/default/test2/df76e4acab5398e70be332f6807ec3ba/f1/fda213c556d540a58d29d6bd85931dcd
Scanned kv count -> 0

 In HFilePrettyPrinter we use "scanner.seekTo(PrivateCellUtil.createFirstOnRow(this.row))" to seek to row.But this method will retrurn -1 when the row is the first row of hfile.

Issue Links

• links to: GitHub Pull Request #2473
• links to: GitHub Pull Request #2481