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| DataCacheExcetion during backtesting |
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vietllc
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| Post subject: DataCacheExcetion during backtesting |
Post rating: 0
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Posted: Sat 06 Dec, 2014, 08:03
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User rating: 0
Joined: Fri 10 Oct, 2014, 02:09
Posts: 27
Location: Vietnam,
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I am writing an app on top of the JForex client library version 2.42.2 to automate backtesting. I am getting the following exception:
2014-12-06 00:33:46.372 ERROR TimeManager - Request to DFS timed out, timeout [10000], request [<ServerTimeRequestMessage(,requestId=207)>]
com.dukascopy.charts.data.datacache.DataCacheException: Request to DFS timed out, timeout [10000], request [<ServerTimeRequestMessage(,requestId=207)>]
at com.dukascopy.charts.data.datacache.CurvesJsonProtocolHandler.processMessage(CurvesJsonProtocolHandler.java:1008)
at com.dukascopy.charts.data.datacache.CurvesJsonProtocolHandler.processMessage(CurvesJsonProtocolHandler.java:928)
at com.dukascopy.charts.data.datacache.CurvesJsonProtocolHandler.loadServerTime(CurvesJsonProtocolHandler.java:1028)
at com.dukascopy.charts.data.datacache.time.TimeManager$3.run(TimeManager.java:191)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
followed by this message:
2014-12-06 00:34:21.871 INFO ClientProtocolHandler - Disconnect task in queue, reason [CONNECTION_PROBLEM], client address [d-ja-hk-04.dukascopy.com/207.46.128.113:10443], transport name [null]
I am guessing the exception was thrown due to some network problems. But in backtesting, I am only reading from the local cache. Why does this exception even occur???
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API Support
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| Post subject: Re: DataCacheExcetion during backtesting |
Post rating: 0
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Posted: Mon 08 Dec, 2014, 14:42
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User rating: ∞
Joined: Fri 31 Aug, 2007, 09:17
Posts: 6139
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In backtesting you still need to download historical data to run test on. As you already mentioned there was some network problems, so this exception occurred.
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vietllc
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| Post subject: Re: DataCacheExcetion during backtesting |
Post rating: 0
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Posted: Fri 09 Jan, 2015, 02:15
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User rating: 0
Joined: Fri 10 Oct, 2014, 02:09
Posts: 27
Location: Vietnam,
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I understand what you are saying. However, the historical data has already been downloaded into the local cache. There should be no need to download the data again. Why is the client library still checking for a network connection?
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tcsabina
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| Post subject: Re: DataCacheExcetion during backtesting |
Post rating: 0
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Posted: Fri 09 Jan, 2015, 12:53
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User rating: 164
Joined: Mon 08 Oct, 2012, 10:35
Posts: 676
Location: NetherlandsNetherlands
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This is how it is (by design).
There will be once a new backtester in JForex4, that could operate offline...
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vietllc
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| Post subject: Re: DataCacheExcetion during backtesting |
Post rating: 0
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Posted: Sun 11 Jan, 2015, 02:03
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User rating: 0
Joined: Fri 10 Oct, 2014, 02:09
Posts: 27
Location: Vietnam,
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Thank you for the info! Any idea when this new backtester will be available?
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tcsabina
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| Post subject: Re: DataCacheExcetion during backtesting |
Post rating: 0
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Posted: Mon 12 Jan, 2015, 14:52
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User rating: 164
Joined: Mon 08 Oct, 2012, 10:35
Posts: 676
Location: NetherlandsNetherlands
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Check the JForex 4 topic.
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