[SR-Users] Core dump while saving user location in mongo

Fri Jan 30 06:22:14 CET 2015

Hello,

I pushed a patch that takes care of initializing the columns array of the
result - it is in the master branch for now.

However, the log messages don't seem to be complete, were you sending all.
The backtrace shows a line which is executed only if an error message is
printed, it is not in the logs you sent.

One thing that I remembered was that usrloc requires parameter
db_insert_null to be set in order to work with mongodb:

-
http://kamailio.org/docs/modules/stable/modules/usrloc.html#usrloc.p.db_insert_null

The crash shouldn't happen and hopefully the patch I pushed catches it. Try
the patch without db_insert_null just to see if there is still a crash or
not.

Cheers,
Daniel

On Thu, Jan 29, 2015 at 11:51 AM, Mickael Marrache <
mickaelmarrache at gmail.com> wrote:

> Now, it didn't crash during the REGISTER but during the INVITE:
>
>
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:705]:
> db_mongodb_query(): query to collection [location]
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:726]:
> db_mongodb_query(): query filter: { "username" : "m1" }
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:745]:
> db_mongodb_query(): columns filter: { "contact" : 1, "expires" : 1, "q" :
> 1, "callid" : 1, "cseq" : 1, "flags" :
>
> 1, "cflags" : 1, "user_agent" : 1, "received" : 1, "path" : 1, "socket" :
> 1, "methods" : 1, "last_modified" : 1, "ruid" : 1, "instance" : 1, "reg_id"
> : 1 }
>
> kamailio[32599]: DEBUG: <core> [db_res.c:118]: db_new_result(): allocate
> 56 bytes for result set at 0x7f83a32daa48
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:203]:
> db_mongodb_get_columns(): 16 columns returned from the query
>
> kamailio[32599]: DEBUG: <core> [db_res.c:155]: db_allocate_columns():
> allocate 128 bytes for result names at 0x7f83a32daf98
>
> kamailio[32599]: DEBUG: <core> [db_res.c:165]: db_allocate_columns():
> allocate 64 bytes for result types at 0x7f83a32daed8
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[0] named: contact
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[0] at
> 0x7f83a32daab8
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:285]:
> db_mongodb_get_columns(): use DB1_STRING result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32daab8)[0]=[contact] (2)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[1] named: expires
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[1] at
> 0x7f83a32dab98
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:275]:
> db_mongodb_get_columns(): use DB1_DATETIME result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dab98)[1]=[expires] (9)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[2] named: q
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[2] at
> 0x7f83a32dabe0
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:270]:
> db_mongodb_get_columns(): use DB1_DOUBLE result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dabe0)[2]=[q] (1)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[3] named: callid
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[3] at
> 0x7f83a32dac70
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:285]:
> db_mongodb_get_columns(): use DB1_STRING result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dac70)[3]=[callid] (2)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[4] named: cseq
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[4] at
> 0x7f83a32dac28
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:260]:
> db_mongodb_get_columns(): use DB1_INT result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dac28)[4]=[cseq] (16)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[5] named: flags
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[5] at
> 0x7f83a32dab50
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:260]:
> db_mongodb_get_columns(): use DB1_INT result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dab50)[5]=[flags] (16)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[6] named: cflags
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[6] at
> 0x7f83a32dae50
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:260]:
> db_mongodb_get_columns(): use DB1_INT result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dae50)[6]=[cflags] (16)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[7] named: user_agent
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[7] at
> 0x7f83a32dacb8
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:285]:
> db_mongodb_get_columns(): use DB1_STRING result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dacb8)[7]=[user_agent] (2)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[8] named: received
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[8] at
> 0x7f83a32dad00
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:285]:
> db_mongodb_get_columns(): use DB1_STRING result type
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:314]:
> db_mongodb_get_columns(): RES_NAMES(0x7f83a32dad00)[8]=[received] (2)
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:231]:
> db_mongodb_get_columns(): Found a field[9] named: path
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:250]:
> db_mongodb_get_columns(): allocate 16 bytes for RES_NAMES[9] at
> 0x7f83a329f778
>
> kamailio[32599]: DEBUG: db_mongodb [mongodb_dbase.c:285]:
> db_mongodb_get_columns(): use DB1_STRING result type
>
> kamailio[32595]: ALERT: <core> [main.c:784]: handle_sigs(): child process
> 32599 exited by a signal 6
>
> kamailio[32595]: ALERT: <core> [main.c:787]: handle_sigs(): core was
> generated
>
> kamailio[32595]: INFO: <core> [main.c:799]: handle_sigs(): terminating due
> to SIGCHLD
>
> kamailio[32605]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32602]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32603]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32600]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32598]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32601]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32604]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32597]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32606]: INFO: <core> [main.c:850]: sig_usr(): signal 15 received
>
> kamailio[32595]: ERROR: ctl [ctl.c:382]: mod_destroy(): ERROR: ctl: could
> not delete unix socket /tmp/kamailio_ctl: Operation not permitted (1)
>
> kamailio[32595]: DEBUG: db_mongodb [mongodb_dbase.c:948]:
> db_mongodb_delete(): delete filter document: { "expires" : { "$date" :
> 1422527804000 }, "expires" : { "$date" : 0 } }
>
> kamailio[32595]: DEBUG: <core> [db_pool.c:102]: pool_remove(): removing
> connection from the pool
>
> kamailio[32595]: DEBUG: tm [t_funcs.c:118]: tm_shutdown(): DEBUG:
> tm_shutdown : start
>
> kamailio[32595]: DEBUG: tm [t_funcs.c:121]: tm_shutdown(): DEBUG:
> tm_shutdown : emptying hash table
>
> kamailio[32595]: DEBUG: tm [t_funcs.c:123]: tm_shutdown(): DEBUG:
> tm_shutdown : removing semaphores
>
> kamailio[32595]: DEBUG: tm [t_funcs.c:125]: tm_shutdown(): DEBUG:
> tm_shutdown : destroying tmcb lists
>
> kamailio[32595]: DEBUG: tm [t_funcs.c:128]: tm_shutdown(): DEBUG:
> tm_shutdown : done
>
> kamailio[32595]: DEBUG: <core> [mem/shm_mem.c:242]: shm_mem_destroy():
> shm_mem_destroy
>
> kamailio[32595]: DEBUG: <core> [mem/shm_mem.c:245]: shm_mem_destroy():
> destroying the shared memory lock
>
> kamailio[32595]: DEBUG: <core> [main.c:803]: handle_sigs(): terminating
> due to SIGCHLD
>
>
>
> Regarding the core dump:
>
>
>
> #0  0x00000031afa32625 in raise () from /lib64/libc.so.6
>
> #1  0x00000031afa33e05 in abort () from /lib64/libc.so.6
>
> #2  0x00000000006196f9 in fm_free (qm=0x7f83a3241010, p=0x20300000203,
> file=0x7f83a2621608 "<core>: db_res.c", func=0x7f83a2622100
> "db_free_columns", line=86) at mem/f_malloc.c:588
>
> #3  0x00007f83a260d7ab in db_free_columns (_r=0x7f83a32daa48) at
> db_res.c:86
>
> #4  0x00007f83a260e79e in db_free_result (_r=0x7f83a32daa48) at
> db_res.c:134
>
> #5  0x00007f83a23ed7cb in db_mongodb_free_result (_h=0x7f83a32de718,
> _r=0x7f83a32daa48) at mongodb_dbase.c:646
>
> #6  0x00007f83a23efd65 in db_mongodb_query (_h=0x7f83a32de718,
> _k=0x7fff25b74840, _op=0x0, _v=0x7fff25b74800, _c=0x7fff25b74850, _n=1,
> _nc=16, _o=0x7f83a02f8c80, _r=0x7fff25b747f8) at mongodb_dbase.c:783
>
> #7  0x00007f83a00d27d2 in db_load_urecord (_c=0x7f83a32de718,
> _d=0x7f839b9700e8, _aor=0x7fff25b74c80) at udomain.c:601
>
> #8  0x00007f83a00d7e8e in get_urecord (_d=0x7f839b9700e8,
> _aor=0x7fff25b74c80, _r=0x7fff25b74c90) at udomain.c:1106
>
> #9  0x00007f839fe7b271 in lookup_helper (_m=0x7f83a33083e0,
> _d=0x7f839b9700e8, _uri=0x0, _mode=0) at lookup.c:173
>
> #10 0x00007f839fe79ffd in lookup (_m=0x7f83a33083e0, _d=0x7f839b9700e8,
> _uri=0x0) at lookup.c:88
>
> #11 0x00007f839fe7eb35 in lookup_branches (msg=0x7f83a33083e0,
> d=0x7f839b9700e8) at lookup.c:448
>
> #12 0x00007f839fe870dd in w_lookup_branches (_m=0x7f83a33083e0,
> _d=0x7f839b9700e8 "H", _p2=0x0) at reg_mod.c:499
>
> #13 0x000000000041d3f2 in do_action (h=0x7fff25b755d0, a=0x7f83a32d8cc8,
> msg=0x7f83a33083e0) at action.c:1094
>
> #14 0x0000000000429a7a in run_actions (h=0x7fff25b755d0, a=0x7f83a32d8cc8,
> msg=0x7f83a33083e0) at action.c:1583
>
> #15 0x000000000042a0df in run_actions_safe (h=0x7fff25b774c0,
> a=0x7f83a32d8cc8, msg=0x7f83a33083e0) at action.c:1648
>
> #16 0x0000000000540b7c in rval_get_int (h=0x7fff25b774c0,
> msg=0x7f83a33083e0, i=0x7fff25b75d90, rv=0x7f83a32d91f8, cache=0x0) at
> rvalue.c:924
>
> #17 0x0000000000544db4 in rval_expr_eval_int (h=0x7fff25b774c0,
> msg=0x7f83a33083e0, res=0x7fff25b75d90, rve=0x7f83a32d91f0) at rvalue.c:1918
>
> #18 0x000000000041ce4e in do_action (h=0x7fff25b774c0, a=0x7f83a32d9d58,
> msg=0x7f83a33083e0) at action.c:1064
>
> #19 0x0000000000429a7a in run_actions (h=0x7fff25b774c0, a=0x7f83a32d9d58,
> msg=0x7f83a33083e0) at action.c:1583
>
> #20 0x0000000000419dea in do_action (h=0x7fff25b774c0, a=0x7f83a32c9048,
> msg=0x7f83a33083e0) at action.c:712
>
> #21 0x0000000000429a7a in run_actions (h=0x7fff25b774c0, a=0x7f83a32c3cd8,
> msg=0x7f83a33083e0) at action.c:1583
>
> #22 0x0000000000419dea in do_action (h=0x7fff25b774c0, a=0x7f83a328d418,
> msg=0x7f83a33083e0) at action.c:712
>
> #23 0x0000000000429a7a in run_actions (h=0x7fff25b774c0, a=0x7f83a328d418,
> msg=0x7f83a33083e0) at action.c:1583
>
> #24 0x000000000041d2cd in do_action (h=0x7fff25b774c0, a=0x7f83a328d658,
> msg=0x7f83a33083e0) at action.c:1079
>
> #25 0x0000000000429a7a in run_actions (h=0x7fff25b774c0, a=0x7f83a327d898,
> msg=0x7f83a33083e0) at action.c:1583
>
> #26 0x000000000042a1a7 in run_top_route (a=0x7f83a327d898,
> msg=0x7f83a33083e0, c=0x0) at action.c:1669
>
> #27 0x000000000050747e in receive_msg (
>
>     buf=0xa6f780 "INVITE sip:XXXXXX at XXXXXXX SIP/2.0\r\nRecord-Route:
> <sip:XXXXXXXXX;lr>\r\nVia: SIP/2.0/UDP
> XXXXXXX;branch=z9hG4bK2be.f31409f558981039fd70ad46afc97176.0\r\nVia:
> SIP/2.0/UDP XXXX"...,
>
>     len=1151, rcv_info=0x7fff25b777b0) at receive.c:216
>
> #28 0x0000000000606e76 in udp_rcv_loop () at udp_server.c:521
>
> #29 0x00000000004a5c97 in main_loop () at main.c:1629
>
> #30 0x00000000004aaf2a in main (argc=13, argv=0x7fff25b77bc8) at
> main.c:2561
>
>
>
> I can try to reproduce the issue with the REGISTER if you need.
>
>
>
> Mickael
>
>
>
> *From:* sr-users [mailto:sr-users-bounces at lists.sip-router.org] *On
> Behalf Of *Daniel-Constantin Mierla
> *Sent:* Thursday, January 29, 2015 12:26 PM
> *To:* Kamailio (SER) - Users Mailing List
> *Subject:* Re: [SR-Users] Core dump while saving user location in mongo
>
>
>
> Also, give the error messages from syslog file.
>
> Cheers,
> Daniel
>
> On 29/01/15 11:23, Daniel-Constantin Mierla wrote:
>
> Hello,
>
> can you give the parameters for usrloc module? Are you using DB_ONLY mode?
>
> Cheers,
> Daniel
>
> On 29/01/15 08:55, Mickael Marrache wrote:
>
> Hi,
>
>
>
> When my proxy receives a REGISTER request, it crashes while saving the
> user location in MongoDB.
>
>
>
> This is the backtrace from the core dump:
>
>
>
> #0  0x0000003f08e32625 in raise () from /lib64/libc.so.6
>
> #1  0x0000003f08e33e05 in abort () from /lib64/libc.so.6
>
> #2  0x00000000006196f9 in fm_free (qm=0x7f4368bf7010, p=0x210add0,
> file=0x7f4367fd7608 "<core>: db_res.c", func=0x7f4367fd8100
> "db_free_columns", line=86) at mem/f_malloc.c:588
>
> #3  0x00007f4367fc37ab in db_free_columns (_r=0x7f4368ca0430) at
> db_res.c:86
>
> #4  0x00007f4367fc479e in db_free_result (_r=0x7f4368ca0430) at
> db_res.c:134
>
> #5  0x00007f4367da37cb in db_mongodb_free_result (_h=0x7f4368c94718,
> _r=0x7f4368ca0430) at mongodb_dbase.c:646
>
> #6  0x00007f4367da5d65 in db_mongodb_query (_h=0x7f4368c94718,
> _k=0x7fffa03d5550, _op=0x0, _v=0x7fffa03d5510, _c=0x7fffa03d5560, _n=1,
> _nc=16, _o=0x7f4365ed2c80, _r=0x7fffa03d5508) at mongodb_dbase.c:783
>
> #7  0x00007f4365cac7d2 in db_load_urecord (_c=0x7f4368c94718,
> _d=0x7f436154a0e8, _aor=0x7fffa03d59d0) at udomain.c:601
>
> #8  0x00007f4365cb1e8e in get_urecord (_d=0x7f436154a0e8,
> _aor=0x7fffa03d59d0, _r=0x7fffa03d5760) at udomain.c:1106
>
> #9  0x00007f4365a75dea in add_contacts (_m=0x7f4368cbdc40,
> _d=0x7f436154a0e8, _a=0x7fffa03d59d0, _mode=1, _use_regid=1) at save.c:832
>
> #10 0x00007f4365a77d32 in save (_m=0x7f4368cbdc40, _d=0x7f436154a0e8,
> _cflags=4, _uri=0x0) at save.c:986
>
> #11 0x00007f4365a606db in w_save2 (_m=0x7f4368cbdc40, _d=0x7f436154a0e8
> "H\240TaC\177", _cflags=0x4 <Address 0x4 out of bounds>) at reg_mod.c:447
>
> #12 0x000000000041d489 in do_action (h=0x7fffa03d6180, a=0x7f4368c71e98,
> msg=0x7f4368cbdc40) at action.c:1100
>
> #13 0x0000000000429a7a in run_actions (h=0x7fffa03d6180, a=0x7f4368c71e98,
> msg=0x7f4368cbdc40) at action.c:1583
>
> #14 0x000000000042a0df in run_actions_safe (h=0x7fffa03d7470,
> a=0x7f4368c71e98, msg=0x7f4368cbdc40) at action.c:1648
>
> #15 0x0000000000540b7c in rval_get_int (h=0x7fffa03d7470,
> msg=0x7f4368cbdc40, i=0x7fffa03d6658, rv=0x7f4368c72830, cache=0x0) at
> rvalue.c:924
>
> #16 0x0000000000544db4 in rval_expr_eval_int (h=0x7fffa03d7470,
> msg=0x7f4368cbdc40, res=0x7fffa03d6658, rve=0x7f4368c72828) at rvalue.c:1918
>
> #17 0x00000000005451aa in rval_expr_eval_int (h=0x7fffa03d7470,
> msg=0x7f4368cbdc40, res=0x7fffa03d6ae0, rve=0x7f4368c72070) at rvalue.c:1926
>
> #18 0x000000000041ce4e in do_action (h=0x7fffa03d7470, a=0x7f4368c73148,
> msg=0x7f4368cbdc40) at action.c:1064
>
> #19 0x0000000000429a7a in run_actions (h=0x7fffa03d7470, a=0x7f4368c71cc0,
> msg=0x7f4368cbdc40) at action.c:1583
>
> #20 0x0000000000419dea in do_action (h=0x7fffa03d7470, a=0x7f4368c3bdb8,
> msg=0x7f4368cbdc40) at action.c:712
>
> #21 0x0000000000429a7a in run_actions (h=0x7fffa03d7470, a=0x7f4368c33898,
> msg=0x7f4368cbdc40) at action.c:1583
>
> #22 0x000000000042a1a7 in run_top_route (a=0x7f4368c33898,
> msg=0x7f4368cbdc40, c=0x0) at action.c:1669
>
> #23 0x000000000050747e in receive_msg (
>
>     buf=0xa6f780 "REGISTER sip:XXXXXXXXXXXX:5060;transport=tcp
> SIP/2.0\r\nVia: SIP/2.0/UDP
> XXXXXXXXX;branch=z9hG4bK242c.26de52a75c8675f6757e0958454a0ad5.0;i=1\r\nv:
> SIP/2.0/TCP XXXXXXXXXX:62051;received=XXXXXXXX"...,
>
>     len=1004, rcv_info=0x7fffa03d7760) at receive.c:216
>
> #24 0x0000000000606e76 in udp_rcv_loop () at udp_server.c:521
>
> #25 0x00000000004a5c97 in main_loop () at main.c:1629
>
> #26 0x00000000004aaf2a in main (argc=13, argv=0x7fffa03d7b78) at
> main.c:2561
>
>
>
> I tested multiple times, it occurs everytime.
>
>
>
> Let me know if you need more information.
>
>
>
> Thanks,
>
> Mickael
>
>
>
>
> _______________________________________________
>
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>
> sr-users at lists.sip-router.org
>
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
> --
>
> Daniel-Constantin Mierla
>
> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>
>
>
> --
>
> Daniel-Constantin Mierla
>
> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>
>

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/micond
<http://www.linkedin.com/in/miconda>
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