ClassNotFoundException when using lazy option of @Reference

[TomCapelle]

Hi !

First of all, I wanted to thank @evanchooly & contributors for this handy mongo ODM.

Therefore, I encounter an issue when I try to query an Entity declared as follows

@Entity("regions")
@Getter @Setter
@NoArgsConstructor
public class Region {

    @Id
    private String id;
    private String name; // Pretty name sent to player
    private String worldName;
    private String wgRegionId;

    @Reference(lazy = true)
    private List<TravelPoint> travelPoints = new ArrayList<>();
    private Map<String, String> defaultTravels = new HashMap<>();

Let's say I'm performing a query such as

datastore.find(Region.class).stream().toList()

I get this error:

dev.morphia.mapping.MappingException: Could not create type
        at dev.morphia.mapping.codec.references.ReferenceCodec.createProxy(ReferenceCodec.java:281) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.references.ReferenceCodec.fetch(ReferenceCodec.java:366) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.references.ReferenceCodec.decode(ReferenceCodec.java:192) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.bson.codecs.DecoderContext.decodeWithChildContext(DecoderContext.java:96) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.pojo.EntityDecoder.decodeModel(EntityDecoder.java:68) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.pojo.EntityDecoder.decodeProperties(EntityDecoder.java:89) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.pojo.EntityDecoder.decode(EntityDecoder.java:48) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.pojo.MorphiaCodec.decode(MorphiaCodec.java:76) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.pojo.EntityDecoder.decode(EntityDecoder.java:53) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.pojo.MorphiaCodec.decode(MorphiaCodec.java:76) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.CommandResultArrayCodec.decode(CommandResultArrayCodec.java:52) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.CommandResultDocumentCodec.readValue(CommandResultDocumentCodec.java:60) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:87) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:42) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.bson.internal.LazyCodec.decode(LazyCodec.java:53) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.bson.codecs.BsonDocumentCodec.readValue(BsonDocumentCodec.java:104) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.CommandResultDocumentCodec.readValue(CommandResultDocumentCodec.java:63) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:87) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:42) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.ReplyMessage.<init>(ReplyMessage.java:48) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.InternalStreamConnection.getCommandResult(InternalStreamConnection.java:567) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.InternalStreamConnection.receiveCommandMessageResponse(InternalStreamConnection.java:461) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.InternalStreamConnection.sendAndReceive(InternalStreamConnection.java:372) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.UsageTrackingInternalConnection.sendAndReceive(UsageTrackingInternalConnection.java:114) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.DefaultConnectionPool$PooledConnection.sendAndReceive(DefaultConnectionPool.java:765) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.CommandProtocolImpl.execute(CommandProtocolImpl.java:76) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.DefaultServer$DefaultServerProtocolExecutor.execute(DefaultServer.java:209) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.DefaultServerConnection.executeProtocol(DefaultServerConnection.java:115) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.DefaultServerConnection.command(DefaultServerConnection.java:83) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.DefaultServerConnection.command(DefaultServerConnection.java:74) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.connection.DefaultServer$OperationCountTrackingConnection.command(DefaultServer.java:299) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.SyncOperationHelper.createReadCommandAndExecute(SyncOperationHelper.java:273) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.FindOperation.lambda$execute$1(FindOperation.java:325) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.SyncOperationHelper.lambda$withSourceAndConnection$0(SyncOperationHelper.java:127) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.SyncOperationHelper.withSuppliedResource(SyncOperationHelper.java:152) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.SyncOperationHelper.lambda$withSourceAndConnection$1(SyncOperationHelper.java:126) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.SyncOperationHelper.withSuppliedResource(SyncOperationHelper.java:152) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.SyncOperationHelper.withSourceAndConnection(SyncOperationHelper.java:125) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.FindOperation.lambda$execute$2(FindOperation.java:322) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.SyncOperationHelper.lambda$decorateReadWithRetries$12(SyncOperationHelper.java:292) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.async.function.RetryingSyncSupplier.get(RetryingSyncSupplier.java:67) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.FindOperation.execute(FindOperation.java:333) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.internal.operation.FindOperation.execute(FindOperation.java:73) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.client.internal.MongoClientDelegate$DelegateOperationExecutor.execute(MongoClientDelegate.java:153) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.client.internal.MongoIterableImpl.execute(MongoIterableImpl.java:130) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.mongodb.client.internal.MongoIterableImpl.iterator(MongoIterableImpl.java:90) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.query.MorphiaQuery.prepareCursor(MorphiaQuery.java:372) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.query.MorphiaQuery.iterator(MorphiaQuery.java:228) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.query.Query.stream(Query.java:452) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.query.Query.stream(Query.java:441) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at fr.vinderland.runecore.modules.travel.TravelModule.getRegionByLocation(TravelModule.java:75) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at fr.vinderland.runecore.modules.travel.listeners.RegionListener.onPlayerJoin(RegionListener.java:107) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor207.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:81) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:git-Paper-497]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.20.4.jar:git-Paper-497]
        at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[paper-1.20.4.jar:git-Paper-497]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
        at net.minecraft.server.players.PlayerList.placeNewPlayer(PlayerList.java:345) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.server.network.ServerConfigurationPacketListenerImpl.handleConfigurationFinished(ServerConfigurationPacketListenerImpl.java:134) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.network.protocol.configuration.ServerboundFinishConfigurationPacket.handle(ServerboundFinishConfigurationPacket.java:18) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.network.protocol.configuration.ServerboundFinishConfigurationPacket.a(ServerboundFinishConfigurationPacket.java:9) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:54) ~[?:?]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:149) ~[?:?]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1465) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:194) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:123) ~[?:?]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1442) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1365) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:133) ~[?:?]
        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1343) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1232) ~[paper-1.20.4.jar:git-Paper-497]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[paper-1.20.4.jar:git-Paper-497]
        at java.lang.Thread.run(Unknown Source) ~[?:?]
Caused by: java.lang.IllegalArgumentException: Could not create type
        at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:170) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.references.ReferenceCodec.createProxy(ReferenceCodec.java:272) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        ... 76 more
Caused by: java.lang.NoClassDefFoundError: dev/morphia/mapping/codec/references/MorphiaProxy
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.access$300(ByteArrayClassLoader.java:57) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader$ClassDefinitionAction.run(ByteArrayClassLoader.java:687) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader$ClassDefinitionAction.run(ByteArrayClassLoader.java:639) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at java.security.AccessController.doPrivileged(Unknown Source) ~[?:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.doPrivileged(ByteArrayClassLoader.java) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.findClass(ByteArrayClassLoader.java:406) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
        at java.lang.Class.forName0(Native Method) ~[?:?]
        at java.lang.Class.forName(Unknown Source) ~[?:?]
        at java.lang.Class.forName(Unknown Source) ~[?:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.load(ByteArrayClassLoader.java:361) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$WrappingDispatcher.load(ClassLoadingStrategy.java:367) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default.load(ClassLoadingStrategy.java:148) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:101) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:6325) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.references.ReferenceCodec.makeProxy(ReferenceCodec.java:343) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.references.ReferenceCodec.createProxy(ReferenceCodec.java:272) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        ... 76 more
Caused by: java.lang.ClassNotFoundException: dev.morphia.mapping.codec.references.MorphiaProxy
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.findClass(ByteArrayClassLoader.java:404) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.access$300(ByteArrayClassLoader.java:57) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader$ClassDefinitionAction.run(ByteArrayClassLoader.java:687) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader$ClassDefinitionAction.run(ByteArrayClassLoader.java:639) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at java.security.AccessController.doPrivileged(Unknown Source) ~[?:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.doPrivileged(ByteArrayClassLoader.java) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.findClass(ByteArrayClassLoader.java:406) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
        at java.lang.Class.forName0(Native Method) ~[?:?]
        at java.lang.Class.forName(Unknown Source) ~[?:?]
        at java.lang.Class.forName(Unknown Source) ~[?:?]
        at net.bytebuddy.dynamic.loading.ByteArrayClassLoader.load(ByteArrayClassLoader.java:361) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default$WrappingDispatcher.load(ClassLoadingStrategy.java:367) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.loading.ClassLoadingStrategy$Default.load(ClassLoadingStrategy.java:148) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.TypeResolutionStrategy$Passive.initialize(TypeResolutionStrategy.java:101) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.dynamic.DynamicType$Default$Unloaded.load(DynamicType.java:6325) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.references.ReferenceCodec.makeProxy(ReferenceCodec.java:343) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:168) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:399) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:190) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:410) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        at dev.morphia.mapping.codec.references.ReferenceCodec.createProxy(ReferenceCodec.java:272) ~[RuneCore-1.0-SNAPSHOT-jar-with-dependencies.jar:?]
        ... 76 more

This Caused by: java.lang.ClassNotFoundException: dev.morphia.mapping.codec.references.MorphiaProxy is quite disturbing. All my dependencies are bundled in the final jar so in theory, it should be present.

I am using morphia-core v2.4.14 (latest this day I think).

I see in this documentation (https://morphia.dev/morphia/2.4/references.html) that the experimental API for references is not documented anymore, I don't know if using it would fix my problem.

Thanks by advance for any help provided.

[evanchooly]

It's weird that it can find other classes in that same jar. Is there not a "caused by" clause further down the stack?

[TomCapelle]

No, the ClasssNotFoundException is the latest "caused by" in the stack. I agree it is weird, I am wondering if I use the correct dependency.

<dependency>
  <groupId>dev.morphia.morphia</groupId>
  <artifactId>morphia-core</artifactId>
  <version>2.4.14</version>
</dependency>

Then it is bundled in the jar with the classic maven-assembly-plugin approach.

[evanchooly]

That's the correct dependency. Maybe the assembly plugin messed up? Make sure that pre-assembly depenedency jar has that class (it should.)

[TomCapelle]

I checked this in a quite barbaric way:

jar tf my-final-jar.jar | grep MorphiaProxy
> dev/morphia/mapping/codec/references/MorphiaProxy.class

It seems the class is present in the final jar which gives me the ClassNotFoundException, it makes this error even more strange. The only other jar generated by maven is the jar with my code only, without any dependency. So I don't understand why you mean by "pre-assembly dependency jar".

I'll try another approach with maven-shade-plugin, to see if the issue is caused by the assembly plugin somehow messing up during the build.

EDIT: I got same issue with maven-shade-plugin

[TomCapelle]

Hi,

I'm just updating this discussion, I tried to reproduce this issue in a minimal setup (i.e just a main function), and it worked. So the issue is definitely somewhere in my project.

Sorry for bothering you !

[evanchooly]

Not a bother at all. I'm glad you're making progress at least.