RE: calling init_mib() to reload SNMP MIBs

Actually, I did try it. I am seeing a memory leak. So, I called unload_all_mibs() first, unfortunately I got a crash!. I'm running net-snmp version 5.2.1.2. What is the ideal way to reload the mibs dynamically?. Is it by calling read_all_mibs()?. I noticed the only calling read_all_mibs() does not work. Need to call add_mibdir() before!.

#0  0x68cde52f in thr_kill () from /usr/lib32/libc.so.6
#1  0x689507be in _thr_send_sig () from /usr/lib32/libthr.so.2
#2  0x689483bf in raise () from /usr/lib32/libthr.so.2
#3  0x68d59ee2 in abort () from /usr/lib32/libc.so.6
#4  0x68cf8b5e in _UTF8_init () from /usr/lib32/libc.so.6
#5  0x68cf8ba6 in _UTF8_init () from /usr/lib32/libc.so.6
#6  0x68cf9b00 in _UTF8_init () from /usr/lib32/libc.so.6
#7  0x68cf9d3c in _UTF8_init () from /usr/lib32/libc.so.6
#8  0x68cf9e72 in free () from /usr/lib32/libc.so.6
#9  0x68ad9f74 in free_tree (Tree=0x6) at parse.c:883
#10 0x68adbb4d in unload_module_by_ID (modID=51, tree_top=0x906cd80) at parse.c:3962
#11 0x68adbd70 in unload_all_mibs () at parse.c:4026





> Date: Thu, 25 Jun 2009 08:20:03 +0100
> Subject: Re: FW: calling init_mib() to reload SNMP MIBs
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> 
> 2009/6/24 Samer Vazdekis <[email protected]>:
> > I am simply calling init_mib() from my signal handler. This is not working for
> > me!. .... Am I missing somthing?.
> 
> init_mib is designed to be called *once*.
> If called a second time, it will simply return immediately.
> 
> 
> 
> >  I managed to reload MIB file. But instead calling init_mib(), I'm calling
> > the following functions,
> >
> > add_mibdir("/usr/local/share/snmp/mibs/");
> > init_mib_internals();
> 
> Again, init_mib_internals is also designed to be called *once*,
> and if called a second time, will simply return immediately.
> You can safely omit this.
> 
> 
> > read_all_mibs();
> >
> >
> > I'm afraid however that I might get a memory leak!
> 
> Well test it, then!
> Monitor the memory usage of a quiescent agent,
> while repeatedly signalling it to re-load the MIBs.
> 
> It should be fairly clear whether this leaks memory or not.
> 
> 
> 
> >. Should I call unload_all_mibs() before?.
> 
> Again - suck it and see.
> 
> If you've got a question like this ("what happens if...."),
> it's best to actually try it out for yourself, and see what happens.
> 
> Dave

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