[Buildbot] #3101: exception while rendering logs

[Buildbot trac]

#3101: exception while rendering logs
-------------------+-----------------------
Reporter:  sa2ajj  |       Owner:  dustin
    Type:  defect  |      Status:  assigned
Priority:  major   |   Milestone:  0.9.0
 Version:  master  |  Resolution:
Keywords:  web     |
-------------------+-----------------------
Changes (by dustin):

 * owner:   => dustin
 * status:  new => assigned


Comment:

 I wrote up a quick verification script:
 {{{
 #! python
 import sqlalchemy as sa

 db_url = "sqlite:////A/bbrun/state.sqlite"

 def verify():
     eng = sa.create_engine(db_url)
     conn = eng.connect()

     for log_row in conn.execute("select id, num_lines, type from logs"):
         print "verifying log", log_row.id
         assert log_row['type'] in 'sth'

         line_ranges = []
         for logchunk_row in conn.execute("select first_line, last_line,
 content from logchunks where logid=%d" % log_row['id']):
             content, first, last = logchunk_row['content'],
 logchunk_row['first_line'], logchunk_row['last_line']
             assert last >= first
             assert str(content).count('\n') == last - first
             line_ranges.append((logchunk_row['first_line'],
 logchunk_row['last_line']))

         next_line = 0
         for f, l in sorted(line_ranges):
             assert f == next_line
             next_line = l + 1

         assert log_row['num_lines'] == next_line

 if __name__ == "__main__":
     verify()
 }}}

 and all logs in the DB (including 1470 and 1488) pass without issue.

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Ticket URL: <http://trac.buildbot.net/ticket/3101#comment:6>
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