Thanks for reminding me about this. I was sure this had already been done.
On 03/14/2011 09:05 PM, Seva Gluschenko wrote: > David, > > if by occasion you experience concurrent cf-agent runs, there's a > situation possible when one instance locks insert_lines promises and > another one locks delete_lines promises. There were discussions with > Mark about locking the whole file to prevent such undesired > concurrency overlaps, and I hope he will implement it in the next > release. > > 2011/3/14 David Lee <david....@ecmwf.int>: >> Using 3.1.4 community on CentOS 5.5. >> >> I'm writing a bundle to maintain the set of "server" lines in >> "/etc/ntp.conf". The cleanest way seems to be for that bundle to delete >> the lines and re-insert them. Almost invariably the result should be >> identical (no change) and so cfengine3 will detect this and correctly >> skip taking any action. >> >> But sometimes it fails inexplicably. It is random, intermittent; I >> cannot generate it at will; it "just happens". >> >> The "delete_lines" gets obeyed, but the "insert_lines" seems not to >> happen, so it generates an unwanted change, deleting but failing to >> re-insert those lines. Ouch. (A subsequent run will then successfully >> do both the delete and the insert and will restore the file to what it >> had been (and to how it should have stayed as permanently). >> >> Since this time on Friday (three days ago) it has generated 14 unwanted >> "break and later repair" incidents, even though the cfengine3 config was >> completely static. >> >> >> Any clues? >> >> (Note: whether or not this really is the cleanest way to do achieve this >> maintenance of "ntp.conf" is a different issue, and one which would take >> us back to a recent conversation about a CPAN-like collection of >> commonly needed things, written in a "best practice" way. But that is a >> different issue from this random, intermittent, failure. I suggest that >> we stay on this failure in this thread, and not get sidetracked onto the >> CPAN/best-practice question.) >> >> If this is a known bug, that's OK; just let me known its status, please. >> >> >> -- >> : David Lee >> : ECMWF (Data Handling System) >> : Shinfield Park >> : Reading RG2 9AX >> : Berkshire >> : >> : tel: +44-118-9499 362 >> : email: david....@ecmwf.int >> _______________________________________________ >> Help-cfengine mailing list >> Help-cfengine@cfengine.org >> https://cfengine.org/mailman/listinfo/help-cfengine >> > > > _______________________________________________ Help-cfengine mailing list Help-cfengine@cfengine.org https://cfengine.org/mailman/listinfo/help-cfengine
