FasterXML / FasterXML/jackson-module-scala
Dependency on .class and .tasty files causes footprint bloat for GraalVM NativeImage
- Dominant language
- Scala
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Description
Both `.class` and `.tasty` files are read at run time, e.g.
**.class file access stack trace**
``` at java.lang.ClassLoader.getResource(ClassLoader.java:1395)
at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1733)
at com.thoughtworks.paranamer.BytecodeReadingParanamer.getClassAsStream(BytecodeReadingParanamer.java:131)
at com.thoughtworks.paranamer.BytecodeReadingParanamer.getClassAsStream(BytecodeReadingParanamer.java:124)
at com.thoughtworks.paranamer.BytecodeReadingParanamer.lookupParameterNames(BytecodeReadingParanamer.java:92)
at com.thoughtworks.paranamer.CachingParanamer.lookupParameterNames(CachingParanamer.java:90)
at com.fasterxml.jackson.module.scala.introspect.JavaParameterIntrospector$.getCtorParamNames$$anonfun$1(JavaParameterIntrospector.scala:13)
at com.fasterxml.jackson.module.scala.introspect.JavaParameterIntrospector$$$Lambda$310/0x0000000800edafc0.apply(Unknown Source:-1)
at scala.util.Try$.apply(Try.scala:210)
at com.fasterxml.jackson.module.scala.introspect.JavaParameterIntrospector$.getCtorParamNames(JavaParameterIntrospector.scala:13)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.getCtorParams(BeanIntrospector.scala:246)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$2(BeanIntrospector.scala:53)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$$$Lambda$309/0x0000000800ed9d08.apply(Unknown Source:-1)
at scala.collection.StrictOptimizedIterableOps.flatMap(StrictOptimizedIterableOps.scala:118)
at scala.collection.StrictOptimizedIterableOps.flatMap$(StrictOptimizedIterableOps.scala:105)
at scala.collection.immutable.Vector.flatMap(Vector.scala:113)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.findConstructorParam$1(BeanIntrospector.scala:53)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$5$$anonfun$5(BeanIntrospector.scala:195)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$$$Lambda$307/0x0000000800ed36a0.apply(Unknown Source:-1)
at scala.collection.ArrayOps$.map$extension(ArrayOps.scala:932)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.$anonfun$5(BeanIntrospector.scala:195)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$$$Lambda$288/0x0000000800ecf4b0.apply(Unknown Source:-1)
at scala.collection.immutable.List.flatMap(List.scala:293)
at scala.collection.immutable.List.flatMap(List.scala:79)
at com.fasterxml.jackson.module.scala.introspect.BeanIntrospector$.apply(BeanIntrospector.scala:195)
at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$._descriptorFor(ScalaAnnotationIntrospectorModule.scala:196)
at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$.fieldName(ScalaAnnotationIntrospectorModule.scala:207)
at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$.findImplicitPropertyName(ScalaAnnotationIntrospectorModule.scala:41)
at com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair.findImplicitPropertyName(AnnotationIntrospectorPair.java:488)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector._addFields(POJOPropertiesCollector.java:556)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.collectAll(POJOPropertiesCollector.java:445)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getPropertyMap(POJOPropertiesCollector.java:405)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getProperties(POJOPropertiesCollector.java:247)
at com.fasterxml.jackson.databind.introspect.BasicBeanDescription._properties(BasicBeanDescription.java:164)
at com.fasterxml.jackson.databind.introspect.BasicBeanDescription.findProperties(BasicBeanDescription.java:239)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._findCreatorsFromProperties(BasicDeserializerFactory.java:317)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._constructDefaultValueInstantiator(BasicDeserializerFactory.java:271)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory.findValueInstantiator(BasicDeserializerFactory.java:222)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:262)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:151)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:415)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:350)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:264)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:244)
at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:142)
at com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(DeserializationContext.java:654)
at com.fasterxml.jackson.databind.ObjectMapper._findRootDeserializer(ObjectMapper.java:4956)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4826)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3785)
```
**.tasty file access stack trace**
``` at java.lang.ClassLoader.getResource(ClassLoader.java:1395)
at java.lang.Class.getResource(Class.java:2939)
at com.fasterxml.jackson.module.scala.util.TastyUtil$.hasTastyFile(TastyUtil.scala:22)
at com.fasterxml.jackson.module.scala.util.ClassW.extendsScalaClass(Classes.scala:16)
at com.fasterxml.jackson.module.scala.util.ClassW.extendsScalaClass$(Classes.scala:8)
at com.fasterxml.jackson.module.scala.util.ClassW$$anon$1.extendsScalaClass(Classes.scala:39)
at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$._descriptorFor(ScalaAnnotationIntrospectorModule.scala:186)
at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$.fieldName(ScalaAnnotationIntrospectorModule.scala:207)
at com.fasterxml.jackson.module.scala.introspect.ScalaAnnotationIntrospector$.findImplicitPropertyName(ScalaAnnotationIntrospectorModule.scala:41)
at com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair.findImplicitPropertyName(AnnotationIntrospectorPair.java:488)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector._addFields(POJOPropertiesCollector.java:556)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.collectAll(POJOPropertiesCollector.java:445)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getPropertyMap(POJOPropertiesCollector.java:405)
at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.getProperties(POJOPropertiesCollector.java:247)
at com.fasterxml.jackson.databind.introspect.BasicBeanDescription._properties(BasicBeanDescription.java:164)
at com.fasterxml.jackson.databind.introspect.BasicBeanDescription.findProperties(BasicBeanDescription.java:239)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._findCreatorsFromProperties(BasicDeserializerFactory.java:317)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory._constructDefaultValueInstantiator(BasicDeserializerFactory.java:271)
at com.fasterxml.jackson.databind.deser.BasicDeserializerFactory.findValueInstantiator(BasicDeserializerFactory.java:222)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.buildBeanDeserializer(BeanDeserializerFactory.java:262)
at com.fasterxml.jackson.databind.deser.BeanDeserializerFactory.createBeanDeserializer(BeanDeserializerFactory.java:151)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer2(DeserializerCache.java:415)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createDeserializer(DeserializerCache.java:350)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCache2(DeserializerCache.java:264)
at com.fasterxml.jackson.databind.deser.DeserializerCache._createAndCacheValueDeserializer(DeserializerCache.java:244)
at com.fasterxml.jackson.databind.deser.DeserializerCache.findValueDeserializer(DeserializerCache.java:142)
at com.fasterxml.jackson.databind.DeserializationContext.findContextualValueDeserializer(DeserializationContext.java:621)
at com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer.createContextual(ObjectArrayDeserializer.java:147)
at com.fasterxml.jackson.databind.DeserializationContext.handleSecondaryContextualization(DeserializationContext.java:867)
at com.fasterxml.jackson.databind.DeserializationContext.findRootValueDeserializer(DeserializationContext.java:659)
at com.fasterxml.jackson.databind.ObjectReader._prefetchRootDeserializer(ObjectReader.java:2430)
at com.fasterxml.jackson.databind.ObjectReader.(ObjectReader.java:194)
at com.fasterxml.jackson.databind.ObjectMapper._newReader(ObjectMapper.java:780)
at com.fasterxml.jackson.databind.ObjectMapper.readerForArrayOf(ObjectMapper.java:4303)
```
This isn't an issue for normal JVM usage, but if the application is built with [GraalVM Native Image](https://www.graalvm.org/22.0/reference-manual/native-image/) it results in both the `.class` and `.tasty` files being included in the resulting executable, leading to increased footprint.
With the correct NativeImage reflection configuration the image does work so I'd hesitate to call this an outright bug, but the requirement to access both `.class` and `.tasty` files at runtime is an issue if Native Image size is a concern.
There may be nothing that can be done about the need to include `.tasty` files for runtime access. I may be wrong, but from a cursory look it appears that `com.thoughtworks.paranamer` is being used to replicate functionality such as reading parameter names that can be done directly?
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