Decoding into Kotlin data class fails with NullPointerException: Cannot invoke java.lang.Number.intValue()

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    • Type: Bug
    • Resolution: Works as Designed
    • Priority: Unknown
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    • Affects Version/s: None
    • Component/s: Kotlin
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    • Java Drivers
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      3. Which versions of the driver/connector does this apply to?

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      1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?
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      Summary

      I'm trying to serialize the data class:

      @Serializable
data class User(
val name: String = "MISSING",
val isAlive: Boolean = true,
val age: Int,
)

      This fails with:

      java.lang.IllegalArgumentException: java.lang.NullPointerException: Cannot invoke "java.lang.Number.intValue()" because the return value of "sun.invoke.util.ValueConversions.primitiveConversion(sun.invoke.util.Wrapper, Object, boolean)" is null
    at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:70)
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
    at kotlin.reflect.jvm.internal.calls.CallerImpl$Constructor.call(CallerImpl.kt:41)
    at kotlin.reflect.jvm.internal.KCallableImpl.callDefaultMethod$kotlin_reflection(KCallableImpl.kt:207)
    at kotlin.reflect.jvm.internal.KCallableImpl.callBy(KCallableImpl.kt:112)
    at org.bson.codecs.kotlin.DataClassCodec.decode(DataClassCodec.kt:104)
    ... 63 more_
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Number.intValue()" because the return value of "sun.invoke.util.ValueConversions.primitiveConversion(sun.invoke.util.Wrapper, Object, boolean)" is null
    at java.base/sun.invoke.util.ValueConversions.unboxInteger(ValueConversions.java:81)
    at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
    ... 69 more

      Motivation

      Who is the affected end user?

      Who are the stakeholders?

      How does this affect the end user?

      Are they blocked? Are they annoyed? Are they confused?

      How likely is it that this problem or use case will occur?

      Main path? Edge case?

      If the problem does occur, what are the consequences and how severe are they?

      Minor annoyance at a log message? Performance concern? Outage/unavailability? Failover can't complete?

      Is this issue urgent?

            Assignee:
            Ross Lawley
            Reporter:
            Ivan Canet
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              Created:
              Updated:
              Resolved: