[NUTCH-2297] CrawlDbReader -stats wrong values for earliest fetch time and shortest interval

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.13
• Fix Version/s: 1.14
• Component/s: crawldb
• Assignee: Sebastian Nagel
• Reporter: Sebastian Nagel
• Created: 08/Aug/16 10:06
• Updated: 13/Mar/24 14:51
• Resolved: 14/Dec/17 15:14

Description

NUTCH-2286 added min, max and average for fetch interval and fetch time.
When running in distributed mode (not reproducible in local mode), the values for the minimum (earliest fetch time and shortest fetch interval) may be wrong with implausible values:

TOTAL urls: 7180518032
 shortest fetch interval:    175 days, 00:00:00             <<<<<< ????
 avg fetch interval: 10 days, 08:01:36
 longest fetch interval:     15 days, 18:00:00
 earliest fetch time:        Thu Dec 20 05:30:00 UTC 3106   <<<<<< ????
 avg of fetch times: Fri Feb 19 00:07:00 UTC 2016
 latest fetch time:  Mon Jul 18 05:22:00 UTC 2016
 retry 0:    6907984913
 retry 1:    148125397
 retry 2:    82761892
 retry 3:    41645830
 min score:  0.0
 avg score:  0.014360981
 max score:  9.25
 ...

Issue Links

• is part of: NUTCH-2474 CrawlDbReader -stats fails with ClassCastException
• is superceded by: NUTCH-2474 CrawlDbReader -stats fails with ClassCastException