GSON not a good fit for deserializing SGD models
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Key: MAHOUT-545
URL: https://issues.apache.org/jira/browse/MAHOUT-545
Project: Mahout
Issue Type: Bug
Components: Classification
Affects Versions: 0.4
Reporter: Ted Dunning
Fix For: 0.5
The problem is that GSON uses JavaCC which does LL(k) parsing. The way that
the JSON grammar is expressed causes stack recursion for each element of
a vector.
This is evil for parsing large models.
I will be changing ModelSerializer to fix this and will provide a reverse
compatible mode for anybody who has been able to serialize/deserialize these
models in the past. My thought is to just make all the SGD models Writables.
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