Hi,

I'm doing stress tests on my app (and IQFeed) and "hammer in" requests on news and historical data on port 9100.

Now for the third time I experienced, that there are some garbage bytes in the data read from port 9100:
20:56:41:883 (0) Dtn.DtnSocket.Write9100: msg='NH:US:10:0;'
20:56:41:923 (0) Dtn.DtnSocket.Read9100: msg='h-Dl version='1.0'?>'
20:56:41:923 (0) Dtn.DtnSocket.Read9100: msg='<news_headlines>'
20:56:41:923 (0) Dtn.DtnSocket.Read9100: msg='</news_headlines>'
20:56:41:923 (0) Dtn.DtnSocket.Read9100: msg=''
20:56:41:933 (0) Dtn.DtnSocket.Read9100: msg=''
20:56:41:973 (0) Dtn.DtnSocket.Read9100: msg='!ENDMSG!'

There have many successful requests on this testing session before, but out of sudden, this problem occured. (the wrong data should read "<?xml...")

Any idea what could be going wrong ?

Regards

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Dierk Droth
www.trademagic.net
TradeMagic - Trading at its best

Dierk,

I'm not sure what caused this problem. I'll forward it on to the software engineering staff to investigate.

Steve Grunberg
IQFeed Developer Support
DTN Market Access

Steve,

I think its a general problem "hammering" requests into DTN.

I'd like to refer you to http://forums.dtniq.com/index.cfm?page=topic&topicID=243 so you can do some more analysis.

Steve,

Hmm, this scares me.

Has any of you DTN guys tried to reproduce the problem by using the sample code as suggested ? What are the results ?

I don't know if the issues are related, but as for "my" problem: As soon as the beta of next version of TM is out, there will be a public test driver to (hopefully) reproduce this problem. Please contact me on PM, if you need more information.

Regards

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Dierk Droth
www.trademagic.net
TradeMagic - Trading at its best

Dierk,

Are you referring to the sample code that frankzhou provided within another forum discussion thread ("IQLinkLauncher error report")? If so, it has been sent to our software engineering staff. We'll publish an update on what they find as soon as I get the results.

Steve Grunberg
IQFeed Developer Support
DTN Market Access

Here is more garbage data on port 9100:

(xlversion='1.0'?><news_headlines></news_headlines>

I experienced that problem on tracking 100 NASDAQ stocks as the market opened some minutes ago. I have 3 threads running on all 3 ports at the same time.

At this very moment that PC had a processor load of ~10%. Thus, I can't be related to processor load.

Is this issue related to: http://forums.iqfeed.net/index.cfm?page=topic&topicID=304 ?

Regards

---

Dierk Droth
www.trademagic.net
TradeMagic - Trading at its best

After that event, my app crashed a minute later or so.

A Windows runtime box came up and indicated me, that the problem was not in my pure .NET code (which did run in debugger) but in native Win32 code. At this very moment, the only Win32 code loaded was "IQ32.dll".

There really is some issue, you should take care of. Please let me know what's going wrong there.

Regards

---

Dierk Droth
www.trademagic.net
TradeMagic - Trading at its best
Edited by Dierk Droth on Nov 10, 2004 at 10:18 AM

Dierk,

I think this issue is the same as the post titled "How can I ever get a message "Pt4" at port 9100 ?" because we are dealing with garbage and port 9100 in both posts.

You mentioned have 3 threads running on 3 ports...are the ports 5009, 9100 and 9200?

Also, in an earlier post on Oct 23, 2004 04:59 AM you asked if "Has any of you DTN guys tried to reproduce the problem by using the sample code as suggested ? What are the results ?"

We have tested history requests on port 9100 with our example apps. Were you referring to sample code other than IQFeed's example apps? Also, if you can give me more information on how you are "hammering" requests, I can try to reproduce it here. Thanks!

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Natalie Hannan DTN Market Access, LLC.

Natalie,

Yep, these threads are running on ports 5009, 9100 and 9200.

Today I did run 2 kind of tests:
- A market data grid to retrieve the market data for the 100 stocks. I modified my app code a bit to eliminate performance impact on my app's end.
- A test suite which basically hammers in requests for historical data.

Regards

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Dierk Droth
www.trademagic.net
TradeMagic - Trading at its best

I just had this problem again:
- I did run tests on hammering in requests on historical data
- and had a skype voice chat session on the same internet connection

Regards

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Dierk Droth
www.trademagic.net
TradeMagic - Trading at its best