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From Nicolás Lichtmaier <nicol...@wolfram.com.INVALID>
Subject Re: FlattenGraphFilter assertion error
Date Fri, 08 Mar 2019 03:08:01 GMT
Oops, sorry... in that code there's a "camelCase" parameter that is not 
implemented in normal Lucene. That is an option I've added for better 
camel case support, but the bug happens without that option as well.

El 7/3/19 a las 20:33, Nicolás Lichtmaier escribió:
>
> After a lot of time... Here's an small example that triggers that 
> assertion.
>
>             Builder builder = CustomAnalyzer.builder();
>
> builder.withTokenizer(StandardTokenizerFactory.class);
> builder.addTokenFilter(WordDelimiterGraphFilterFactory.class, 
> "camelCase", "1", "preserveOriginal", "1");
>             builder.addTokenFilter(StopFilterFactory.class);
>
> builder.addTokenFilter(FlattenGraphFilterFactory.class);
>             Analyzer analyzer = builder.build();
>
>             TokenStream ts = analyzer.tokenStream("*", new 
> StringReader("x7in"));
>             ts.reset();
>             while(ts.incrementToken())
>                 ;
>
> This gives:
>
> Exception in thread "main" java.lang.AssertionError: 2
>     at 
> org.apache.lucene.analysis.core.FlattenGraphFilter.releaseBufferedToken(FlattenGraphFilter.java:195)
>     at 
> org.apache.lucene.analysis.core.FlattenGraphFilter.incrementToken(FlattenGraphFilter.java:258)
>     at com.wolfram.textsearch.AnalyzerError.main(AnalyzerError.java:32)
>
> It's the interaction between WordDelimiterGraphFilter and stop word 
> removal, it seems, that trigger an assertion when flattening.
>
>
> El 12/10/17 a las 19:18, Michael McCandless escribió:
>> Hmm, that's not good!  Clearly there is a bug somewhere.
>>
>> Are you able to isolate a small example, e.g. text input and synonyms 
>> you fed to SynonymGraphFilter, to show this assertion trip?
>>
>> Are you using any custom analysis components before the 
>> FlattenGraphFilter?
>>
>> Mike McCandless
>>
>> http://blog.mikemccandless.com
>>
>> On Tue, Oct 10, 2017 at 11:24 AM, Nicolás Lichtmaier 
>> <nicolasl@wolfram.com <mailto:nicolasl@wolfram.com>> wrote:
>>
>>     Hi!
>>
>>     I was getting an exception in FlattenGraphFilter and, as I saw
>>     there was assertion statements nearby, I reran everything with
>>     assertions enabled. And I see it crashes here
>>     (FlattenGraphFilter.java:174)
>>
>>
>>     At this point inputNode has all fields with -1 (except nextOut,
>>     which is 0).. and outputFrom's value is 395.
>>
>>     The code is pretty complex, so before trying to undestand it I
>>     thought maybe someone could know what's happening just seeing
>>     this, maybe not. =)
>>
>>     I'll keep the debugging session open for a while in case some
>>     more variables could be useful to debug this.
>>
>>     Thanks!
>>
>>
>>

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