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serialization of scala.collection.immutable.ListMap fails in 2.9.x

See original GitHub issue

This might be related to #2080, not 100% sure. I’m trying to upgrade from 2.8.3 to 2.9.6, and I’m getting a new exception in some of our tests,

Failed to specialize base type 
scala.collection.immutable.ListMap<com.twitter....LengthBucket,java.lang.Object> as 
scala.collection.immutable.ListMap$Node, problem: Type parameter #1/2 differs; 
can not specialize com.twitter...LengthBucket with java.lang.Object

I think there’s a bug in the way that the ListMap serializer is implemented in jackson-module-scala, but it used to work, and #2080 pointed out that TypeHandlers shouldn’t need to know about these details, so I hope this can be fixed in jackson-databind. In the mean time, any idea how we can work around this issue?

Issue Analytics

State:
Created 5 years ago
Comments:9 (4 by maintainers)

Top GitHub Comments

1reaction

mosesncommented, Sep 2, 2018

For what it’s worth, the MapperFeature.USE_STATIC_TYPING workaround works for this too.

0reactions

dejanlokar1commented, Aug 14, 2019

@cowtowncoder thank you! I opened a new issue #2422.

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