[Xymon] Acknowledge issue continues with xymon 4.3.2

[Clark, Sean]

Thank you I will install this post haste.

Hope your surgery goes well, try not to look at bright lights for a while
:-D








On 4/7/11 5:02 PM, "Henrik Størner" <henrik at hswn.dk> wrote:

>Den 07-04-2011 15:45, Clark, Sean skrev:
>> But I can say, using the webpage default method produces the same error
>> messages "Cookie not found" -- so I didn't think it would be my method
>>of
>> acknowledging
>
>Ok, that would have been my next question :-)
>
>It is quite possible that it's a bug in the xymond code. I don't know
>why it hits you so much, but that is kind of irrelevant.
>
>Inside xymond, the cookies are stored in a datastructure called a
>"red-black tree" ("rbtree" for short). This uses some code that I picked
>up from someone else - it is used in lots of places, e.g. all of the
>hosts.cfg configuration is also stored in a similar datastructure.
>
>However, the cookie-handling is special because it cookies are
>frequently deleted (hosts being removed happens much less frequently). I
>have had some crashes that I could never really explain when hosts were
>removed, and I really do suspect that particular bit of code that
>deletes an entry from the rbtree to be buggy. Therefore, it could very
>well be that there is a real problem here.
>
>I've come up with a version of xymond.c that eliminates the rbtree code
>for the cookies. It uses a much less efficient way of looking up the
>cookies - basically, it will scan through all of the status-log entries
>that xymond has in memory - but since this only happens when a cookie
>needs to be renewed, or when xymond receives an ack, it should not put
>too much extra load on your system. It would be very interesting to hear
>if this patch on top of 4.3.2 solves the issue; if it does, then I
>surely know that there is a bug in the rbtree "delete node" code.
>
>Regards,
>Henrik
>
>


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