[Nut-upsuser] upsd crashes with a "broken pipe" error

Zach La Celle lacelle at roboticresearch.com
Wed Dec 29 15:00:17 UTC 2010

On 12/29/2010 08:34 AM, Charles Lepple wrote:
> On Dec 27, 2010, at 9:36 AM, Zach La Celle wrote:
>> I ran this in debug mode and captures the backtrace.
>> root@*********:/etc/nut# upsd -D
>> Network UPS Tools upsd 2.4.3
>>   0.000000     listening on port 3493
>>   0.000354     Connected to UPS [rack1ups]: apcsmart-rack1ups
>>   2.550554     User upsmon at logged into UPS [rack1ups]
>> *** glibc detected *** upsd: free(): invalid next size (fast): 
>> 0x00000000012c9870 ***
> Can you give us some background information about this system? What OS 
> and version, who built the package, etc.
> Do you have valgrind available?
> Your version of glibc probably has some more thorough memory 
> corruption detection algorithms than the default - "man malloc" on one 
> of my systems suggests that setting the MALLOC_CHECK_ environment 
> variable to either 1 or 2 will print some additional diagnostics.

Output of uname -a:
Linux www 2.6.32-27-server #49-Ubuntu SMP Thu Dec 2 02:05:21 UTC 2010 
x86_64 GNU/Linux

Information about glibc:
GNU C Library (Ubuntu EGLIBC 2.11.1-0ubuntu7.6) stable release version 
2.11.1, by Roland McGrath et al.
Compiled by GNU CC version 4.4.3.
Compiled on a Linux >>2.6.24-28-server<< system on 2010-11-17.

I didn't know about that MALLOC_CHECK_ variable: I've set it and am 
running the software again to see if I get a better error.

I can install valgrind if necessary.  Let me see what happens this time.

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