Hi Rob,

obviously this is not intentional.
We have tried reproducing this in 3.0 & devel, but with no luck yet.

I am a bit puzzled because you mention that it is ArangoDB 3.0.10 showing 
that issue. The 3.0 branch does and never contained the string 
"DefaultCustomTypeHandler". I remember that code being added to devel, so 
it may have got into the 3.1 branch, but not 3.0. Can you confirm the 
problem is actually occurring in an ArangoDB 3.0? And could you please 
provide the query that triggers the problem?


Am Mittwoch, 12. Oktober 2016 10:58:53 UTC+2 schrieb Rob Keevil:
> Hi,
> I am using arangoDB 3.0.10 and arangodb-java-driver 3.0.3 (latest stable). 
>  I've written a java connector in my application, which is using 
> arangoDriver.executeAqlQueryRaw to return a cursor of Json documents as 
> Strings.
> My input collection contains some single-level Json documents, where all 
> fields in the document are quoted strings (e.g. "business_address_city": 
> "├ůMLI" ). My query is returning all documents in the collection.
> For every document returned, arangoDB logs in the console:
> 2016-10-12T08:21:02Z [1] WARNING DefaultCustomTypeHandler called
> As well as being messy, i think this is really affecting the performance 
> of my application when selecting millions of documents.  Can anyone give me 
> some pointers on what is happening?
> Thanks,
> Rob

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