[Webware-devel] Webware killed
Hi all, I'm experimenting webware for the first time to use it in my enterprise. I've developed an XML-RPC service in Python (obviously!) that connect to an Oracle db, make some queries and return the results. Under medium usage (5-10 requests every 5 minutes), the webware app server kill himself and output the following: /home/xxx/yyy/AppServer: line 27: 14440 Killed $PYTHON$PY_OPTS Launch.py ThreadedAppServer $* these are the last lines of the activity log: 92.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54 2008,1.49,False 192.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54 2008,2.35,False 192.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54 2008,3.19,False 192.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54 2008,4.06,False while no trace of this error is reported in the errors log. Am I missing something? Thanks for your help, -- Dott. Damiano Morosi Atac S.p.A. - Agenzia per la Mobilità del Comune di Roma Direzione Sistemi - Area Centrale della Mobilità Sviluppo funzioni sistemiche della Centrale 00157 Roma - Via Ostiense, 131/L Tel.: (+39) 0646959361 Mail: [EMAIL PROTECTED] Skype: damiano.morosi Web: http://www.atac.roma.it - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 ___ Webware-devel mailing list Webware-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/webware-devel
Re: [Webware-devel] Webware killed
Yes the cause is cx_Oracle. I have installed version 4.4 of the module,
that is the last. the code of the method is very simple, and i report it
as well:
### CODE START ###
def getLoS(self, panel_id):
try:
connection = cx_Oracle.connect(self.oracle_vms_dsn)
cursor = connection.cursor()
sql = select statodiag, diagnosticaled from
pannelli where nome=' + panel_id +'
cursor.execute(sql)
r = cursor.fetchall()
cursor.close()
if r[0][0] = 1:
return 0.0
else:
tot = len(r[0][1])
ok = r[0][1].count('?')
return float(%1.2f %
(float(ok)/float(tot)))
except cx_Oracle.Error:
raise Fault(802, 'Database error: ' +
str(sys.exc_info( )[1]))
except Exception, e:
raise Fault(801, 'Exception: ' + e.args[0] )
### CODE END ###
Did you notice something strange in this? Am I makeing some mistakes?
Thanks for your support.
Damiano Morosi ha scritto:
Hi,
thanks for your suggestions. The only thing prensent in
/var/log/messages are the following lines:
Jul 9 15:25:14 fe-oracle VMS: failed
Jul 9 15:25:14 fe-oracle VMS: succeeded
Jul 9 15:28:53 fe-oracle VMS: failed
Jul 9 15:28:53 fe-oracle VMS: succeeded
Jul 9 15:59:47 fe-oracle VMS: failed
Jul 9 15:59:47 fe-oracle VMS: succeeded
and I don't know what they mean, seems like the service fail and then
succeed each time. Now I'll try to comment out the oracle module and
'fake' the connection to db to determine if this is the cause.
Thanks for your support, I'll keep you informed!
Ben Parker ha scritto:
That looks like the os might have killed the process. Check your syslogs
- did you exceed a memory limit?
Damiano Morosi wrote on 7/9/08 7:31 AM:
Hi all,
I'm experimenting webware for the first time to use it in my enterprise.
I've developed an XML-RPC service in Python (obviously!) that connect to
an Oracle db, make some queries and return the results.
Under medium usage (5-10 requests every 5 minutes), the webware app
server kill himself and output the following:
/home/xxx/yyy/AppServer: line 27: 14440 Killed
$PYTHON$PY_OPTS Launch.py ThreadedAppServer $*
these are the last lines of the activity log:
92.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54
2008,1.49,False
192.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54
2008,2.35,False
192.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54
2008,3.19,False
192.168.200.252,POST,/VMS/2/service.py,0,service,Wed Jul 9 16:10:54
2008,4.06,False
while no trace of this error is reported in the errors log. Am I missing
something? Thanks for your help,
-
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--
Dott. Damiano Morosi
Atac S.p.A. - Agenzia per la Mobilità del Comune di Roma
Direzione Sistemi - Area Centrale della Mobilità
Sviluppo funzioni sistemiche della Centrale
00157 Roma - Via Ostiense, 131/L
Tel.: (+39) 0646959361
Mail: [EMAIL PROTECTED]
Skype: damiano.morosi
Web: http://www.atac.roma.it
-
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Re: [Webware-devel] Webware killed
OK all done, my script now is absolutely better (thanks for the suggestions), but the problem persists... However, I have another piece of the puzzle; when the error occurs, the system says: *** glibc detected *** free(): invalid pointer: 0x089ebc70 *** maybe a memory leak problem? my configuration is python 2.3.4, GCC 3.4.6, kernel 2.6.9-67.0.20.EL. The dist is a CentOS, and the machine is virtualized under VMWare. Compatibility issues? Christoph Zwerschke ha scritto: Damiano Morosi schrieb: Did you notice something strange in this? Am I makeing some mistakes? Thanks for your support. Nothing that should cause the process to be killed. But there are some things you could improve to make everything more stable and secure: * make the code safe against SQL injection (e.g. excute with params) * properly close connections and cursors in case of failure (use try/finally or the with statement if cx_oracle supports it) * use DBUtils or something similar for connection pooling -- Christoph - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 ___ Webware-devel mailing list Webware-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/webware-devel -- Dott. Damiano Morosi Atac S.p.A. - Agenzia per la Mobilità del Comune di Roma Direzione Sistemi - Area Centrale della Mobilità Sviluppo funzioni sistemiche della Centrale 00157 Roma - Via Ostiense, 131/L Tel.: (+39) 0646959361 Mail: [EMAIL PROTECTED] Skype: damiano.morosi Web: http://www.atac.roma.it - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 ___ Webware-devel mailing list Webware-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/webware-devel
Re: [Webware-devel] Webware killed
SOLVED: there was a problem in threading. It's been necessary to specify the following in the connection string: connection = cx_Oracle.connect(oracle_dsn, threaded=True) Adding the threaded=True parameter, the service is up running from 14 hours, against the 5 minutes before. This should be something important to say maybe also on the (excellent) WebWare site. Thank you all! Christoph Zwerschke ha scritto: Damiano Morosi schrieb: maybe a memory leak problem? my configuration is python 2.3.4, GCC 3.4.6, kernel 2.6.9-67.0.20.EL. The dist is a CentOS, and the machine is virtualized under VMWare. Compatibility issues? Yes, this looks like a memory allocation problem of cx_oracle; or there is an incompatibility with the Oracle or Python version you are using. I would try to reproduce the problem outside the context of Webware and ask for help on the cx_oracle mailing list. -- Christoph - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 ___ Webware-devel mailing list Webware-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/webware-devel -- Dott. Damiano Morosi Atac S.p.A. - Agenzia per la Mobilità del Comune di Roma Direzione Sistemi - Area Centrale della Mobilità Sviluppo funzioni sistemiche della Centrale 00157 Roma - Via Ostiense, 131/L Tel.: (+39) 0646959361 Mail: [EMAIL PROTECTED] Skype: damiano.morosi Web: http://www.atac.roma.it - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 ___ Webware-devel mailing list Webware-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/webware-devel
