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"Just a quick one to say I'm very impressed so far :) The documentation for developers is excellent and I've quickly managed to get an app written to do historical downloads. The system is very robust and pretty quick considering the extent of data that's available. The support guys have been very helpful too, in combination with the forums it's been plain sailing so far!" - Comment from Adam
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bards
-Interested User-
Posts: 32
Joined: May 7, 2011
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Posted: Oct 3, 2019 11:24 PM
Msg. 1 of 4
Hi,
I have a program that runs daily, and gathers Level1 Data. What is happening is that the program encounters errors and then shuts down prematurely.
(I turned on Logging to see what is going on). This is the last bit of the file:
TO CLIENT L1Error 768 1 2019-10-03 19:00:00 Encountered WSAEWOULDBLOCK while sending to client java.exe. Queuing 44646737 bytes. First 6 4 bytes of data Q,MSFT1918V137,3.10,264,2.98,19,18,15:59:07.464559,2.94,12,88,15 STATUS Information 768 1 2019-10-03 19:00:00 LEVEL1 SOCKET CLOSED - java.exe STATUS Information 768 0 2019-10-03 19:00:00 LAST CLIENT DISCONNECTED. SHUTTING DOWN IN 5 SEC. ... STATUS Information 768 0 2019-10-03 19:00:05 Ping Results: Round Trip Time: 22ms STATUS Connectivity 2288 0 2019-10-03 19:00:05 Authorizations Thread shutting down (156384765) - Context was terminated STATUS Information 768 0 2019-10-03 19:00:05 IQConnect Exit
What is going on? And how can I avoid this error?
Thanks for any help.
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DTN_Gary_Stephen
-DTN Guru-
Posts: 394
Joined: Jul 3, 2019
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Posted: Oct 7, 2019 03:44 PM
Msg. 2 of 4
I will review this log and let you know my findings. We may want to get a more complete log from you as well.
Sincerely, Gary Stephen DTN IQFeed Implementation Support Specialist
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DTN_Gary_Stephen
-DTN Guru-
Posts: 394
Joined: Jul 3, 2019
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Posted: Oct 10, 2019 08:49 AM
Msg. 3 of 4
WSAEWOULDBLOCK is a windows socket error code. It means that IQConnect tried to send data to your application, but there was no space left on the socket buffer to receive it. When this happens, IQFeed queues any further data until that data can be delivered, or the app disconnects. The next two lines indicate that this happened (the socket closed and the app disconnected). The remaining lines describe IQConnect/IQFeed shutting down. This is all normal behavior.
So the underlying problem is that the socket buffer is filling, meaning that data is coming in faster than the program is processing it.
Sincerely, Gary Stephen DTN IQFeed Implementation Support Specialist
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bards
-Interested User-
Posts: 32
Joined: May 7, 2011
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Posted: Oct 10, 2019 09:09 AM
Msg. 4 of 4
Thanks Gary for inspecting the log file, and determining the cause of the error. I will have to rewrite the program to prevent that.
Thanks again for your response. bards
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