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From "Enrico Caltran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENENET-602) Error using Lucene.Net.Facet 4.8.0-beta00005 with Xamarin.iOS
Date Wed, 20 Jun 2018 13:27:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENENET-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518131#comment-16518131
] 

Enrico Caltran commented on LUCENENET-602:
------------------------------------------

Hello,
I've tried setting on a test with the three instructions suggested, but it's seems to work
just fine. 
Tried with "int", but also with a complex entity and also with a custom class that take two
generic type and execute the equality comparer. 
I pointed out this as the possible cause because i've got some similar problems in the past,
but it's seems that maybe this is not the right path to follow this time. Rereading the document
at https://developer.xamarin.com/guides/ios/advanced_topics/limitations/ could help more i
think, for example there is the paragraph "Using Delegates to call Native Functions" in which
is contained our exception.



In case if you want I'll send you the test code used.

Thank you in advance.

> Error using Lucene.Net.Facet 4.8.0-beta00005  with Xamarin.iOS
> --------------------------------------------------------------
>
>                 Key: LUCENENET-602
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-602
>             Project: Lucene.Net
>          Issue Type: Bug
>          Components: Lucene.Net.Facet
>    Affects Versions: Lucene.Net 4.8.0
>         Environment: Xamarin Forms 3.0.0.561731
> Ios 10.3.3 and Higher
> Lucene.Net.Facet 4.8.0-beta00005
>            Reporter: Enrico Caltran
>            Priority: Blocker
>              Labels: AOT, Xamarin.iOS, lucene.net.facet
>             Fix For: Lucene.Net 4.8.0
>
>   Original Estimate: 120h
>  Remaining Estimate: 120h
>
> I'm using Lucene.Net.Facet 4.8.0-beta00005 in a big Xamarin project.
> +With Xamarin.Android and Xamarin.UWP it's all right.+
> *+But With Xamarin.iOS on device (Ipad)+*, i'm receiving this error:
>  _Attempting to JIT compile method 'Lucene.Net.Support.LurchTable2&lt;Lucene.Net.Facet.Taxonomy.FacetLabel,
Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader/Int32Class&gt;:InternalInsert&lt;Lucene.Net.Support.LurchTable2/Add2Info<Lucene.Net.Facet.Taxonomy.FacetLabel,
Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader/Int32Class>> (int,Lucene.Net.Facet.Taxonomy.FacetLabel,int&,Lucene.Net.Support.LurchTable`2/Add2Info<Lucene.Net.Facet.Taxonomy.FacetLabel,
Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader/Int32Class>&)' while running
in aot-only mode. See [https://developer.xamarin.com/guides/ios/advanced_topics/limitations/]
for more information._
> _{color:#d04437}at Lucene.Net.Support.LurchTable2[TKey,TValue].Insert[T] (TKey key, T&amp;
value) &lt;0x2570f48 + 0x000e0&gt; in &lt;063e095c95d945a4ace32ab83d1227eb#2ae0fea9ea4eacaef83bf2e9713bb8ea&gt;:0
at (wrapper unknown) System.Object.gsharedvt_in() at Lucene.Net.Support.LurchTable2[TKey,TValue].AddOrUpdate
(TKey key, TValue addValue, Lucene.Net.Support.KeyValueUpdate2[TKey,TValue] fnUpdate) &lt;0x232824c
+ 0x0013b&gt; in &lt;063e095c95d945a4ace32ab83d1227eb#2ae0fea9ea4eacaef83bf2e9713bb8ea&gt;:0
at Lucene.Net.Facet.Taxonomy.LRUHashMap2[TKey,TValue].Put (TKey key, TValue value) <0x2c487f8
+ 0x0015b> in <79d3a7b905954d0993025c09c5d087ce#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader.GetOrdinal (Lucene.Net.Facet.Taxonomy.FacetLabel
cp) <0x2c51970 + 0x0019b> in <79d3a7b905954d0993025c09c5d087ce#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at Lucene.Net.Facet.Taxonomy.Int32TaxonomyFacets.GetTopChildren{color} (System.Int32 topN,
System.String dim, System.String[] path) <0x2c481dc + 0x0008f> in <79d3a7b905954d0993025c09c5d087ce#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at Login.MyMB.Lucene.Client.LuceneArticoliSearcher.GetListaArticoloXRicercaAvanzataConRicercaSemplice
(System.Collections.Generic.List1[T] listParametri) &lt;0x224add0 + 0x001bb&gt; in
&lt;8f49891e0f0546e185aba7424d294ef7#2ae0fea9ea4eacaef83bf2e9713bb8ea&gt;:0 at Login.MyMB.Lucene.Client.LuceneArticoliSearcher.GetListaArticoloConRicercaSemplice
(System.Collections.Generic.List1[T] listParametri) <0x224afbc + 0x0009f> in <8f49891e0f0546e185aba7424d294ef7#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at MyMB.Forms.RicercaLucene.RicercaArticoloLucene.GetListaArticoliXRicercaSemplice (Login.MyMB.Interface.IAmbiente
ambiente, Login.MyMB.Lucene.Client.LuceneArticoliSearcher las, System.Collections.Generic.List`1[T]
ListParametri, System.Boolean isAbilitataRicercaBarcode) <0xe47fc0 + 0x000e7> in <f1bb3149abe145459612794f1a096634#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
..............................._
> At the link [https://docs.microsoft.com/it-it/xamarin/ios/internals/limitations] , I
found the problem cause (I suppose...):
> _Value types as Dictionary Keys Using a value type as a Dictionary<TKey, TValue>
key is problematic, as the default Dictionary constructor attempts to use EqualityComparer<TKey>.Default.
EqualityComparer<TKey>.Default, in turn, attempts to use Reflection to instantiate a
new type which implements the IEqualityComparer<TKey> interface. This works for reference
types (as the reflection+create a new type step is skipped), but for value types it crashes
and burns rather quickly once you attempt to use it on the device. Workaround: Manually implement
the IEqualityComparer<TKey> interface in a new type and provide an instance of that
type to the Dictionary<TKey, TValue> (IEqualityComparer<TKey>) constructor._
> So, what can I do? Thank you in advance, Enrico Caltran +393357485560 [enrico.caltran@timegroup.it|mailto:enrico.caltran@timegroup.it]



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