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IDProjectCategoryView StatusLast Update
0015102CentOS-7glibcpublic2018-07-25 17:28
Reporterchiluk 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
Product Version7.5.1804 
Target VersionFixed in Version 
Summary0015102: NSCD not correctly reporting cache hit statistics
DescriptionNSCD is not reporting cache hits.
Steps To Reproduce1. Install and start nscd
2. Run ping -c 1 <a dns host> twice.
3. run `nscd -g` to show statistics
4. Notice that the cache hits lines are still 0.

* /var/log/nscd.log shows
Wed Jul 25 17:11:58 2018 - 18873: Haven't found "bind.lxc" in hosts cache!
Wed Jul 25 17:11:58 2018 - 18873: add new entry "bind.lxc" of type GETHOSTBYNAME for hosts to cache (first)
Wed Jul 25 17:12:03 2018 - 18873: handle_request: request received (Version = 2) from PID 19471
Wed Jul 25 17:12:03 2018 - 18873: GETFDHST
Wed Jul 25 17:12:03 2018 - 18873: provide access to FD 7, for hosts

The "provide access to FD 7" appears to be output from a cache hit.

A tcp dump also confirms that no dns traffic leaves the box.

Expected behavior: statistics should show 1 cache hit, and 1 cache miss.
Additional InformationRemoving /var/db/nscd so that nscd can not create a persistent db seems to make nscd report correct statistics.
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Issue History

Date Modified Username Field Change
2018-07-25 17:28 chiluk New Issue