Concurrently converting several DXF files

Aspose.CAD Product Family
1

When performing several conversions from DXF to jpeg (all in their own thread) I’m getting exceptions like these:

Individually they all convert fine.

Exception: KeyNotFoundException

Message: The given key ‘Aspose.CAD.FileFormats.Cad.CadTables.CadVportTableObject’ was not present in the dictionary.

Stack Trace:
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at Aspose.CAD.FileFormats.Cad.CadObjects.CadBase.#=zY3iDRjk1p$2J()
at Aspose.CAD.FileFormats.Cad.CadObjects.CadBase.#=zo00ou3w=(String #=z7BdCCgA6OM0u, CadEntityAttribute #=zds3uYIo=, CadCodeValue #=zEb_mALE=)
at #=zin7f7sv5$vufzWMpRNWbpd48iWY_w0LdGQnm6_EoAAypEMJDm5fcOo8=.#=zF1difJ0=(CadBase #=zqrGNnGg=, CadEntityAttribute #=zds3uYIo=)
at #=z3CYZMlsqd0qWtBJEIDGWh$9x0n7YdiWlABIBNJCcVKWsGJTjWQ==.#=zWEpzZ_BlsiVo(CadBase #=zqrGNnGg=)
at #=z3CYZMlsqd0qWtBJEIDGWh$9x0n7YdiWlABIBNJCcVKWsGJTjWQ==.#=zirl8Ah3pI3N9f1PUcQ==(CadVportTableObject #=zqrGNnGg=)
at Aspose.CAD.FileFormats.Cad.CadTables.CadVportTableObject.#=z3KPgDbo=(#=z0J7S2wcDXpI2DhlCnfUk0Q86hWc3bOTg9jEg9CbVZsRQ #=zRWILLnY=)
at #=zVG4YdbRWrzcRH8fTSqLdnQTCatg2m_lfPugEhK4pYDtv_MYBTg==.#=zQJBYR0Y=(CadBase #=zqrGNnGg=, #=zZPKWl_0ucKQ$L91qsc5oUbHS9telVq6Wqs$8ELo= #=z0k5PavU=, String #=z7BdCCgA6OM0u, CadEntityAttribute #=zx9CJNZOl4kKu, Boolean #=z$PWpz3eN4jMLtHPDXA==)
at #=zVG4YdbRWrzcRH8fTSqLdnQTCatg2m_lfPugEhK4pYDtv_MYBTg==.#=zQJBYR0Y=(CadBase #=zqrGNnGg=, #=zZPKWl_0ucKQ$L91qsc5oUbHS9telVq6Wqs$8ELo= #=z0k5PavU=, Boolean #=z$PWpz3eN4jMLtHPDXA==)
at #=zKf28ONAoD3lWr6kjnB3AdQEy57SU$7jsBtGNBhs45yxc.#=zII_4k$shBgqGzKYi9w==(CadCodeValue #=zc$Kq9Jo=)
at #=zKf28ONAoD3lWr6kjnB3AdQEy57SU$7jsBtGNBhs45yxc.#=zzcSEqtzYuaHm()
at #=zKf28ONAoD3lWr6kjnB3AdQEy57SU$7jsBtGNBhs45yxc.#=zoi4q7Tc=()
at #=zRN29L9zWvuOTCv2KFbRx8fRKGtb4rb2sNP6Zjh4=.#=zh2aJCag=(StreamContainer #=zZA5P0j5HMoSW, LoadOptions #=zp1tqkxzzlfWQ)

or

Exception: InvalidOperationException

Message: Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection’s state is no longer correct.

Stack Trace:
at System.Collections.Generic.Dictionary2.TryInsert(TKey key, TValue value, InsertionBehavior behavior) at System.Collections.Generic.Dictionary2.set_Item(TKey key, TValue value)
at #=z6A$d_74EZDa2m_gEmsRAzsq9mm0LGQoLGPWj5QMTcfULNXLp6PFv8mSPVCDAwo0gCA==.#=zzku1UkMPCYbT(#=zfpP18RGzQ60cSrycsf8ZsKs= #=z9k0339I=, Double #=zjBNCuvCOwxeQ)
at #=ztvs5tBnKP5NRWw$GE6FLb1VyC81ovRhK3KzNwWY9tP30SLJu82Bva2_oCR0OW0$YKg==.#=z5EpgjdxkAjSJ(#=zR2tLDOhRsSWonQ1tG3d5wFhMSh3n3BWim03bK_SYkqLECdIrghjpdurqh$J_ERK2Jg== #=zD5hIixg=, String #=z0wHX_24huwwQ)
at #=ztvs5tBnKP5NRWw$GE6FLb1VyC81ovRhK3KzNwWY9tP30SLJu82Bva2_oCR0OW0$YKg==.#=zGHfesgXM5s6B(#=zvt7hJC68MrvW3crJDd4REdtmH4EhRdtzWawqeHrl1jZNEgGBWhAEq4I= #=zkhbSMoCeQeus0aDJZEONUkk=, #=zB2K$fQGIZipQisqftRFrJg4x9_fAg13LvLCM2Tvt7NlMjFnfZlymo6t6Yv60 #=zScdvqZ3MzWqm, #=z3tffIQ_h6argn2LAMLO0pNGQDzFR_81AZ60Xkxj6_ZFfKH_EIqcG$7ZfXWfpA99E7w== #=zayS7uTc=, Boolean #=zZ6MY5HaH1sl5, TransformationMatrix #=zptDN3S00GeUpFRmm4g==, Boolean #=zCZW7ipo=)
at #=z0sBfBIL_uFfc$ef0DQO_nN1hk0KG3y0MxxU$iqYsUHdAEDY3uaN5IJN_JBxGSRPZKQ==.#=zO92QC2u5P1zU(CadBaseEntity #=zdFZ6Bzs=, #=zvt7hJC68MrvW3crJDd4REdtmH4EhRdtzWawqeHrl1jZNEgGBWhAEq4I= #=zkhbSMoCeQeus0aDJZEONUkk=, #=zB2K$fQGIZipQisqftRFrJg4x9_fAg13LvLCM2Tvt7NlMjFnfZlymo6t6Yv60 #=zScdvqZ3MzWqm, Cad3DPoint #=z9bPxdL39CQF5, Boolean #=zJFTIKUX0bO4BH2khAg==, List1& #=zDSOVt1A=, TransformationMatrix #=zngPO_KVUG5Y6) at #=z0sBfBIL_uFfc$ef0DQO_nN1hk0KG3y0MxxU$iqYsUHdAEDY3uaN5IJN_JBxGSRPZKQ==.#=zKDhTgmE=(CadBaseEntity #=zdFZ6Bzs=, #=zvt7hJC68MrvW3crJDd4REdtmH4EhRdtzWawqeHrl1jZNEgGBWhAEq4I= #=zkhbSMoCeQeus0aDJZEONUkk=, #=zB2K$fQGIZipQisqftRFrJg4x9_fAg13LvLCM2Tvt7NlMjFnfZlymo6t6Yv60 #=zScdvqZ3MzWqm, Cad3DPoint #=z9bPxdL39CQF5) at #=zGgEdSY5Rt8Xta$q4Lko7z8eAoBmVNyssMmjtsGquxTjGx1CAqsi3D3DMYPcSsUHf9EoAGIGSvRZD.#=zKDhTgmE=(CadBaseEntity #=zdFZ6Bzs=, #=zvt7hJC68MrvW3crJDd4REdtmH4EhRdtzWawqeHrl1jZNEgGBWhAEq4I= #=zkhbSMoCeQeus0aDJZEONUkk=, #=zB2K$fQGIZipQisqftRFrJg4x9_fAg13LvLCM2Tvt7NlMjFnfZlymo6t6Yv60 #=zScdvqZ3MzWqm) at #=zvt7hJC68MrvW3crJDd4REdtmH4EhRdtzWawqeHrl1jZNEgGBWhAEq4I=.#=z_JYvbQA=(CadBaseEntity[] #=zFCsu32g=, String #=zVkt4q0jc30kLWGNcEw==, CadBaseEntity #=zdFZ6Bzs=, Int32& #=zpxhSXzCi2ewZO37j0A==) at #=zvt7hJC68MrvW3crJDd4REdtmH4EhRdtzWawqeHrl1jZNEgGBWhAEq4I=.#=z6F8jqE_qJOWF5L$QULYOunQ=.MoveNext() at #=zh2IOFkpF9JuwKOe5xcWZSSXb0z9kmnlIO4MrGDc=.#=z92hJdEqkNvNlWhLAaQ==(#=zt3SHXGnUJUDn0Wl8TZ_Gf_XWj5Rd4osqZy7D1oOoGBdRD53IqA== #=zSz4gZX3cXXqn5jhNaQ==, ImageOptionsBase #=zNWld60A=, List1 #=zCRp0pnk=, Int32 #=zJ_xI9F3gX7ls, Boolean #=zaOSLRh4=, VectorRasterizationOptions #=zXj9$xP8tYvjp0fGYVPtknm8=, #=zmVEsjXtD4Wc6LJsOqA1l3kzgDthQ #=zEYXp9JQd0Wnw, Boolean& #=zB6MLD3hg6v4Y, #=zpNMeySvtDmMYffbO1YrZIPk=& #=zLKvvp7tAhjHd, Boolean& #=zGWLxvDh0jHs9)
at #=zh2IOFkpF9JuwKOe5xcWZSSXb0z9kmnlIO4MrGDc=.#=zGHfesgXM5s6B(Image #=zhyiKGsw=, #=zt3SHXGnUJUDn0Wl8TZ_Gf_XWj5Rd4osqZy7D1oOoGBdRD53IqA== #=zSz4gZX3cXXqn5jhNaQ==, Stream #=zVlin5p0=, ImageOptionsBase #=zNWld60A=, Rectangle #=zXtULc6mV8gRO)
at #=zSgGY1NxUOkq3LpQzAyrq7EIgHCnlHxBVByvBPKY9wWUm.#=zKDhTgmE=(Image #=zhyiKGsw=, Stream #=zVlin5p0=, ImageOptionsBase #=zNWld60A=, Rectangle #=zXtULc6mV8gRO)
at Aspose.CAD.Image.#=z2nQhRlE3ITNUPevNKyeUpxU=.#=zzyJecYVcdC3HluRcqA==(CancellationToken #=z1nhSlD0=)
at #=zVlORPsLXUOfjMqqZEj05Jog=.#=zTbP4oGhJIcOx(Action`1 #=zwKOLOxE=, Boolean #=z_mksRQ0bR_6J, Int32 #=zr7szI8KSp2EC, CancellationToken #=zciitcuE=)
at Aspose.CAD.Image.#=zsML$ZMTs00FQeWaENw==.MoveNext()

2

@nielsbosma,
Hello, we need the entire example for this case, could you please attach here the code and files you use.

3

This is an issue in 22.11.0 that is not present in 22.4.0.

using Aspose.CAD;
using Aspose.CAD.ImageOptions;

var tasks = Enumerable.Range(0, 100).Select(CreateTask);

await Task.WhenAll(tasks);

Task CreateTask(int i = 0)
{
    return Task.Run(() =>
    {
        try
        {
            var image = Image.Load(@"sample.dxf");
            var imageOptions = new JpegOptions();
            var options = new CadRasterizationOptions
            {
                PageHeight = 500,
                PageWidth = 1000
            };
            imageOptions.VectorRasterizationOptions = options;
            image.Save($"sample_{i}.jpeg", imageOptions);
        }
        catch (Exception exception)
        {
            Console.WriteLine(exception);
        }
    });
}
4

@nielsbosma,
is this true for any dxf on your side or just with some particular files?

5

I just took a random sample DXF.

6

sample.zip (61.6 KB)

7

@nielsbosma,
I have created CADNET-8911 to investigate this issue.