Possibly broken config: Json-io config refers to its own classes by fully qualified name in config files, but java-cfenv shades it, renaming its classes.

[jangroothuijse]

In java-cfenv

Here json-io is shaded:
https://github.com/pivotal-cf/java-cfenv/blob/main/java-cfenv-all/build.gradle#L39

shadowJar {
    archiveClassifier.set('')
    mergeServiceFiles()
    transform(PropertiesFileTransformer) {
        paths = ['META-INF/spring.factories']
        mergeStrategy = "append"
    }
    dependencies {
        exclude(dependency('org.springframework.boot::'))
        exclude(dependency('org.springframework::'))
    }
    relocate 'com.cedarsoftware.io', 'io.pivotal.cfenv.shaded.com.cedarsoftware.io'
}

In json-io

Here json-io refers to itself:
https://github.com/jdereg/json-io/blob/master/src/main/resources/config/classFactory.txt#L73

# interface instantiates to...
java.util.Collection = com.cedarsoftware.io.factory.CollectionFactory

The reference com.cedarsoftware.io.factory.CollectionFactory is now wrong, it should io.pivotal.cfenv.shaded.com.cedarsoftware.io.factory.CollectionFactory.

This generates this console output while deploying the app (while the jar it is starting up):

Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Queue

Which is produced here:
https://github.com/jdereg/json-io/blob/47fe31aa3996fff6963fcf7ce65dcf2eb46dbb09/src/main/java/com/cedarsoftware/io/ReadOptionsBuilder.java#L722

System.out.println("Skipping class: " + className + " not defined in JVM, but listed in resources/classFactories.txt");

Which is triggered by a static initializer:
https://github.com/jdereg/json-io/blob/47fe31aa3996fff6963fcf7ce65dcf2eb46dbb09/src/main/java/com/cedarsoftware/io/ReadOptionsBuilder.java#L77

    static {
        // ClassFactories
        loadBaseClassFactory();
        loadBaseReaders();
        loadBaseAliasMappings(ReadOptionsBuilder::addPermanentAlias);
        loadBaseCoercedTypes();
        loadBaseNonRefs();
        loadBaseFieldsNotImported();
        loadBaseNonStandardSetters();

        defReadOptions = new ReadOptionsBuilder().build();
    }

In our app, the console output was the only unexpected behavior. However, to me it seems more could be broken here.
Possible fixes:

• do not shade the dependency
• add config files to override the ones from json-io

[anthonydahanne]

Hello @jangroothuijse
Thank you for your bug report, I've also experienced something very similar with the all in one jar , java-cf-env-all
Looking into it!

[anthonydahanne]

Here are the logs I had

Skipping class: com.cedarsoftware.io.factory.StackTraceElementFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.lang.StackTraceElement
Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collection
Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.List
Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Set
Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.SortedSet
Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.NavigableSet
Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Deque
Skipping class: com.cedarsoftware.io.factory.CollectionFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Queue
Skipping class: com.cedarsoftware.io.factory.MapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Map
Skipping class: com.cedarsoftware.io.factory.MapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.SortedMap
Skipping class: com.cedarsoftware.io.factory.MapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.NavigableMap
Skipping class: com.cedarsoftware.io.factory.CharacterPrimArrayFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: [C
Skipping class: com.cedarsoftware.io.factory.EmptyEnumerationFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$EmptyEnumeration
Skipping class: com.cedarsoftware.io.factory.EmptyIteratorFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$EmptyIterator
Skipping class: com.cedarsoftware.io.factory.EmptyListIteratorFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$EmptyListIterator
Skipping class: com.cedarsoftware.io.factory.EmptyListFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$EmptyList
Skipping class: com.cedarsoftware.io.factory.EmptySetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$EmptySet
Skipping class: com.cedarsoftware.io.factory.EmptyNavigableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableNavigableSet$EmptyNavigableSet
Skipping class: com.cedarsoftware.io.factory.EmptyMapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$EmptyMap
Skipping class: com.cedarsoftware.io.factory.EmptyNavigableMapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableNavigableMap$EmptyNavigableMap
Skipping class: com.cedarsoftware.io.factory.SealableListFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableCollection
Skipping class: com.cedarsoftware.io.factory.SealableListFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableList
Skipping class: com.cedarsoftware.io.factory.SealableListFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableRandomAccessList
Skipping class: com.cedarsoftware.io.factory.SealableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableSet
Skipping class: com.cedarsoftware.io.factory.SealableNavigableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableSortedSet
Skipping class: com.cedarsoftware.io.factory.SealableNavigableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableNavigableSet
Skipping class: com.cedarsoftware.io.factory.SealableMapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableMap
Skipping class: com.cedarsoftware.io.factory.SealableNavigableMapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableSortedMap
Skipping class: com.cedarsoftware.io.factory.SealableNavigableMapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.Collections$UnmodifiableNavigableMap
Skipping class: com.cedarsoftware.io.factory.SealableListFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: com.cedarsoftware.util.SealableList
Skipping class: com.cedarsoftware.io.factory.SealableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: com.cedarsoftware.util.SealableSet
Skipping class: com.cedarsoftware.io.factory.SealableNavigableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: com.cedarsoftware.util.SealableNavigableSet
Skipping class: com.cedarsoftware.io.factory.SealableMapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: com.cedarsoftware.util.SealableMap
Skipping class: com.cedarsoftware.io.factory.SealableNavigableMapFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: com.cedarsoftware.util.SealableNavigableMap
Skipping class: com.cedarsoftware.io.factory.ImmutableListFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.ImmutableCollections$ListN
Skipping class: com.cedarsoftware.io.factory.ImmutableListFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.ImmutableCollections$List12
Skipping class: com.cedarsoftware.io.factory.ImmutableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.ImmutableCollections$SetN
Skipping class: com.cedarsoftware.io.factory.ImmutableSetFactory not defined in JVM, but listed in resources/classFactories.txt, as factory for: java.util.ImmutableCollections$Set12
Could not find class: com.cedarsoftware.io.util.SingletonList which has associated alias value: SingletonList config/aliases.txt
Could not find class: com.cedarsoftware.io.util.SingletonSet which has associated alias value: SingletonSet config/aliases.txt
Could not find class: com.cedarsoftware.io.util.SingletonMap which has associated alias value: SingletonMap config/aliases.txt
Skipping class coercion for source class: java.util.Collections$SingletonList cannot be mapped to: com.cedarsoftware.io.util.SingletonList (not found), listed in resources/coercedTypes.txt
Skipping class coercion for source class: java.util.Collections$SingletonSet cannot be mapped to: com.cedarsoftware.io.util.SingletonSet (not found), listed in resources/coercedTypes.txt
Skipping class coercion for source class: java.util.Collections$SingletonMap cannot be mapped to: com.cedarsoftware.io.util.SingletonMap (not found), listed in resources/coercedTypes.txt
Could not find class: com.cedarsoftware.io.util.SingletonList which has associated alias value: SingletonList config/aliases.txt
Could not find class: com.cedarsoftware.io.util.SingletonSet which has associated alias value: SingletonSet config/aliases.txt
Could not find class: com.cedarsoftware.io.util.SingletonMap which has associated alias value: SingletonMap config/aliases.txt
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: boolean
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: boolean
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$CharacterWriter, listed in resources/customWriters.txt as a custom writer for: char
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$CharacterWriter, listed in resources/customWriters.txt as a custom writer for: char
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$DoubleWriter, listed in resources/customWriters.txt as a custom writer for: double
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$DoubleWriter, listed in resources/customWriters.txt as a custom writer for: double
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$FloatWriter, listed in resources/customWriters.txt as a custom writer for: float
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$FloatWriter, listed in resources/customWriters.txt as a custom writer for: float
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: int
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: int
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.writers.LongWriter, listed in resources/customWriters.txt as a custom writer for: long
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.writers.LongWriter, listed in resources/customWriters.txt as a custom writer for: long
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: short
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: short
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Boolean
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Boolean
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Byte
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Byte
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$CharacterWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Character
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$CharacterWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Character
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$ClassWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Class
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$ClassWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Class
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$DoubleWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Double
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$DoubleWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Double
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$FloatWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Float
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$FloatWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Float
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Integer
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Integer
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.writers.LongWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Long
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.writers.LongWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Long
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Short
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveValueWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.Short
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$JsonStringWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.String
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$JsonStringWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.String
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.StringBuffer
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.StringBuffer
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.StringBuilder
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.lang.StringBuilder
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$BigDecimalWriter, listed in resources/customWriters.txt as a custom writer for: java.math.BigDecimal
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$BigDecimalWriter, listed in resources/customWriters.txt as a custom writer for: java.math.BigDecimal
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$BigIntegerWriter, listed in resources/customWriters.txt as a custom writer for: java.math.BigInteger
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$BigIntegerWriter, listed in resources/customWriters.txt as a custom writer for: java.math.BigInteger
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.net.URL
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.net.URL
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.net.URI
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$PrimitiveUtf8StringWriter, listed in resources/customWriters.txt as a custom writer for: java.net.URI
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$DateAsLongWriter, listed in resources/customWriters.txt as a custom writer for: java.sql.Date
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$DateAsLongWriter, listed in resources/customWriters.txt as a custom writer for: java.sql.Date
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$TimestampWriter, listed in resources/customWriters.txt as a custom writer for: java.sql.Timestamp
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$TimestampWriter, listed in resources/customWriters.txt as a custom writer for: java.sql.Timestamp
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.writers.DurationWriter, listed in resources/customWriters.txt as a custom writer for: java.time.Duration
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.writers.DurationWriter, listed in resources/customWriters.txt as a custom writer for: java.time.Duration
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.writers.InstantWriter, listed in resources/customWriters.txt as a custom writer for: java.time.Instant
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.writers.InstantWriter, listed in resources/customWriters.txt as a custom writer for: java.time.Instant
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$LocalDateWriter, listed in resources/customWriters.txt as a custom writer for: java.time.LocalDate
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$LocalDateWriter, listed in resources/customWriters.txt as a custom writer for: java.time.LocalDate
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$LocalDateTimeWriter, listed in resources/customWriters.txt as a custom writer for: java.time.LocalDateTime
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$LocalDateTimeWriter, listed in resources/customWriters.txt as a custom writer for: java.time.LocalDateTime
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$LocalTimeWriter, listed in resources/customWriters.txt as a custom writer for: java.time.LocalTime
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$LocalTimeWriter, listed in resources/customWriters.txt as a custom writer for: java.time.LocalTime
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$MonthDayWriter, listed in resources/customWriters.txt as a custom writer for: java.time.MonthDay
Note: class failed to instantiate (a custom JsonClassWriter class): com.cedarsoftware.io.Writers$MonthDayWriter, listed in resources/customWriters.txt as a custom writer for: java.time.MonthDay
Note: class not found (custom JsonClassWriter class): com.cedarsoftware.io.Writers$OffsetDateTimeWriter, listed in resources/customWriters.txt as a custom writer for: java.time.OffsetDateTime

[anthonydahanne]

Here are the four text files (in resources/config) to "transform" during shading

• aliases.txt
• classFactory.txt
• coercedTypes.txt
• customWriters.txt