On Sun, Feb 03, 2013 at 08:32:11PM +0100, Niklas Edmundsson wrote: > Hi all! > > Something is definitely fishy with mod_socache_shmcb as shipped with > httpd 2.4.3. I'm hacking on a module that uses 16byte indexes > (IP(v6) addresses) to store 2byte counters (16bit uint), these sizes > are given as hints in the call to the init function. > > After an hour or so with production load, which means > retrieve/store/remove for each connection, it consistently crashes > in mod_socache_shmcb.c
Hi Niklas, thanks for the report and the analysis. You are passing specifically avg_obj_size = 2, avg_id_len = 16 in the hints? It looks like something goes wrong with the sizing heuristics with small obj/id sizes. I can't work out exactly why but it's definitely a bug. Regards, Joe
