Alexey Serbin has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/14818 )

Change subject: log: some cleanup and modernization
......................................................................


Patch Set 2:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/14818/2/src/kudu/consensus/log.cc
File src/kudu/consensus/log.cc:

http://gerrit.cloudera.org:8080/#/c/14818/2/src/kudu/consensus/log.cc@710
PS2, Line 710:   scoped_refptr<ReadableLogSegment> readable_segment(
             :     new ReadableLogSegment(new_segment_path,
             :                            
shared_ptr<RandomAccessFile>(readable_file.release())));
             :   RETURN_NOT_OK(readable_segment->Init(header, 
new_segment->first_entry_offset()));
             :   
RETURN_NOT_OK(reader_add_segment_(std::move(readable_segment)));
> This code is changing in the next patch anyway; I've addressed this feedbac
SGTM


http://gerrit.cloudera.org:8080/#/c/14818/2/src/kudu/consensus/log_reader.cc
File src/kudu/consensus/log_reader.cc:

http://gerrit.cloudera.org:8080/#/c/14818/2/src/kudu/consensus/log_reader.cc@185
PS2, Line 185:       if (previous_seg_seqno != -1 && 
entry->header().sequence_number() != previous_seg_seqno + 1) {
             :         return Status::Corruption(Substitute("Segment sequence 
numbers are not consecutive. "
             :             "Previous segment: seqno $0, path $1; Current 
segment: seqno $2, path $3",
             :             previous_seg_seqno, previous_seg_path,
             :             entry->header().sequence_number(), entry->path()));
             :       }
> This is a graceful failure check while AppendSegmentUnlocked is a CHECK. If
Yup, converting CHECK in AppendSegmentUnlocked() into DCHECK makes sense to me.



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I3106ede5243d05b2a43f8d43f581316b6ee7ada5
Gerrit-Change-Number: 14818
Gerrit-PatchSet: 2
Gerrit-Owner: Adar Dembo <[email protected]>
Gerrit-Reviewer: Adar Dembo <[email protected]>
Gerrit-Reviewer: Alexey Serbin <[email protected]>
Gerrit-Reviewer: Andrew Wong <[email protected]>
Gerrit-Comment-Date: Tue, 03 Dec 2019 21:08:18 +0000
Gerrit-HasComments: Yes

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