Re: radosgw buffer overflow

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Mustafa,

You can get rid of these messages by setting your rgw_obj_chunk_size
>= 'Object size your are testing with'. It will also increase the
performance.

For CivetWeb you just need to set 'rgw_frontends="civetweb port=8080"
, you can tune some of rgw_ config with it. I find the most useful one
with civetweb is 'rgw_thread_pool_size' which maps to 'num_op_thread'
in civetweb configs. I find value of '128' good enough, but you can
play around.

Yehuda,
I didnt find any way to disable access logs in CivetWeb. I set all the
*enable_logs parameter to false.
I am not able to properly setup fcgi multiple instance on same host,
any information would be useful.

On Tue, Nov 11, 2014 at 6:14 PM, pushpesh sharma <pushpesh.eck@xxxxxxxxx> wrote:
> Mustafa,
>
> You can get rid of these messages by setting your rgw_obj_chunk_size >=
> 'Object size your are testing with'. It will also increase the performance.
>
> For CivetWeb you just need to set 'rgw_frontends="civetweb port=8080" , you
> can tune some of rgw_ config with it. I find the most useful one with
> civetweb is 'rgw_thread_pool_size' which maps to 'num_op_thread' in civetweb
> configs. I find value of '128' good enough, but you can play around.
>
> Yehuda,
> I didnt find any way to disable access logs in CivetWeb. I set all the
> *enable_logs parameter to false.
> I am not able to properly setup fcgi multiple instance on same host, any
> information would be useful.
>
>
> On Tue, Nov 11, 2014 at 4:40 PM, Mustafa Muhammad
> <mustafaa.alhamdaani@xxxxxxxxx> wrote:
>>
>> On Tue, Nov 11, 2014 at 1:49 AM, Yehuda Sadeh <yehuda@xxxxxxxxxx> wrote:
>> > On Mon, Nov 10, 2014 at 12:45 PM, Mustafa Muhammad
>> > <mustafaa.alhamdaani@xxxxxxxxx> wrote:
>> >> Hi,
>> >> I am using radosgw to connect to my ceph cluster, I am testing it and
>> >> with large number of requests, I get:
>> >> *** buffer overflow detected ***: /bin/radosgw terminated
>> >> in the syslog.
>> >> I use CentOS 7, and this is the some of the last lines of the log:
>> >>
>> >>  ceph version 0.80.5 (38b73c67d375a2552d8ed67843c8a65c2c0feba6)
>> >>  1: /bin/radosgw() [0x5daaf6]
>> >>  2: (()+0xf130) [0x7f177cd4e130]
>> >>  3: (gsignal()+0x39) [0x7f177bf905c9]
>> >>  4: (abort()+0x148) [0x7f177bf91cd8]
>> >>  5: (()+0x75dd7) [0x7f177bfd0dd7]
>> >>  6: (__fortify_fail()+0x37) [0x7f177c0688f7]
>> >>  7: (()+0x10bac0) [0x7f177c066ac0]
>> >>  8: (()+0x10d867) [0x7f177c068867]
>> >>  9: (OS_Accept()+0xc1) [0x7f177d4a18b1]
>> >>  10: (FCGX_Accept_r()+0x9c) [0x7f177d49f91c]
>> >>  11: (RGWFCGXProcess::run()+0x1c8) [0x4c9318]
>> >>  12: (RGWProcessControlThread::entry()+0xe) [0x4cc25e]
>> >>  13: (()+0x7df3) [0x7f177cd46df3]
>> >>  14: (clone()+0x6d) [0x7f177c05101d]
>> >>  NOTE: a copy of the executable, or `objdump -rdS <executable>` is
>> >> needed to interpret this.
>> >>
>> >> --- logging levels ---
>> >>    0/ 5 none
>> >>    0/ 1 lockdep
>> >>    0/ 1 context
>> >>    1/ 1 crush
>> >>    1/ 5 mds
>> >>    1/ 5 mds_balancer
>> >>    1/ 5 mds_locker
>> >>    1/ 5 mds_log
>> >>    1/ 5 mds_log_expire
>> >>    1/ 5 mds_migrator
>> >>    0/ 1 buffer
>> >>    0/ 1 timer
>> >>    0/ 1 filer
>> >>    0/ 1 striper
>> >>    0/ 1 objecter
>> >>    0/ 5 rados
>> >>    0/ 5 rbd
>> >>    0/ 5 journaler
>> >>    0/ 5 objectcacher
>> >>    0/ 5 client
>> >>    0/ 5 osd
>> >>    0/ 5 optracker
>> >>    0/ 5 objclass
>> >>    1/ 3 filestore
>> >>    1/ 3 keyvaluestore
>> >>    1/ 3 journal
>> >>    0/ 5 ms
>> >>    1/ 5 mon
>> >>    0/10 monc
>> >>    1/ 5 paxos
>> >>    0/ 5 tp
>> >>    1/ 5 auth
>> >>    1/ 5 crypto
>> >>    1/ 1 finisher
>> >>    1/ 5 heartbeatmap
>> >>    1/ 5 perfcounter
>> >>    1/ 5 rgw
>> >>    1/ 5 javaclient
>> >>    1/ 5 asok
>> >>    1/ 1 throttle
>> >>   -2/-2 (syslog threshold)
>> >>   -1/-1 (stderr threshold)
>> >>   max_recent     10000
>> >>   max_new         1000
>> >>   log_file /var/log/ceph/radosgw.log
>> >> --- end dump of recent events ---
>> >
>> > This might be an issue with the fastcgi library that radosgw uses (not
>> > sure which one and what version is used in centos 7). How many
>> > concurrent requests does it handle when it fails? You can try testing
>> > it with the standalone web server (civetweb), see how it behaves.
>> I think I am using fcgi 2.4.0, I use nginx with "fastcgi_buffering
>> off;" so it doesn't touch the disks.
>> Somtimes it handles 4000 connections, sometimes 1000.
>> I want to test civetweb but couldn't find any info about how to do so,
>> can you please give me a link to docs or something.
>>
>> Thank you.
>>
>> Mustafa
>> >>
>> >> P.S. I get lots of errors like:
>> >> RGWObjManifest::operator++(): result: ofs=20971520 stripe_ofs=20971520
>> >> part_ofs=0 rule->part_size=104857600
>> >
>> > This is just a too verbose log message, not necessarily pointing at
>> > anything wrong.
>> >
>> > Thanks,
>> > Yehuda
>> --
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>
>
>
>
> --
> -Pushpesh
>



-- 
-Pushpesh
--
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