Jackson in native image failed to deserialize JsonNode into ConcurrentHashMap with generics

[zipper01]

The deserializer is claimed as @JsonDeserialize(using = Subscriber.Deserializer.class) and defined as below, which works perfectly in a jar file running with Java -jar:

    public static class Deserializer extends StdDeserializer<Subscriber> {

        public Deserializer() {
            //super(Subscriber.class);
            this(null);
        }

        public Deserializer(Class<?> vc) {
            super(vc);
        }

        @Override
        public Subscriber deserialize(JsonParser jp, DeserializationContext ctx)
                throws IOException, JsonProcessingException {
            JsonNode node = jp.getCodec().readTree(jp);
            if (node.isEmpty()) {
                return null;
            }

            JsonNode v = node.get("statusId");
            int id = v == null ? -1 : v.asInt(-1);
            v = node.get("name");
            String name = v == null ? null : v.asText(null);
            v = node.get("password");
            String password = v == null ? null : v.asText(null);
            ConcurrentHashMap<Integer, Account> accounts = null;
            v = node.get("accounts");
            if (v != null) {
                accounts = (new ObjectMapper()).convertValue(v,
                        new TypeReference<ConcurrentHashMap<Integer, Account>>() {
                });
            }
            return new Subscriber(id, name, password, accounts);
        }
    }

But after I converted the jar file to a native image using GraalVM's native-image tool and run the native image, it threw the below exception (at line convertValue) at run-time:

java.lang.IllegalArgumentException: Cannot construct instance of `java.util.concurrent.ConcurrentHashMap` (no Creators, like default constructor, exist): no default constructor found
 at [Source: UNKNOWN; byte offset: #UNKNOWN]
        at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4618)
        at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4559)
        at myclient.sub.Subscriber$Deserializer.deserialize(Subscriber.java:71)
        at myclient.sub.Subscriber$Deserializer.deserialize(Subscriber.java:43)
        at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4613)
        at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:4549)
        at myclient.AgencyMgr.onCtrlLoginSucceeded(AgencyMgr.java:345)
        at myclient.AgencyMgr.lambda$ctrlLogin$4(AgencyMgr.java:338)
        at myclient.net.MyClientEndpoint.runBlockingCtrlOperation(MyClientEndpoint.java:271)
        at myclient.AgencyMgr.ctrlLogin(AgencyMgr.java:333)
        at myclient.AgencyMgr.login(AgencyMgr.java:240)
        at myclient.ui.UIMgr.lambda$new$2(UIMgr.java:26)
        at myclient.ui.Tui$1.run(Tui.java:93)
        at org.graalvm.nativeimage.builder/com.oracle.svm.core.thread.PlatformThreads.threadStartRoutine(PlatformThreads.java:833)
        at org.graalvm.nativeimage.builder/com.oracle.svm.core.posix.thread.PosixPlatformThreads.pthreadStartRoutine(PosixPlatformThreads.java:211)
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.util.concurrent.ConcurrentHashMap` (no Creators, like default constructor, exist): no default constructor found
 at [Source: UNKNOWN; byte offset: #UNKNOWN]
        at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1887)
        at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:414)
        at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1375)
        at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:439)
        at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:32)
        at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:4613)
        ... 14 more

I tried to use MapType type = jsonObjectMapper.getTypeFactory().constructMapType(ConcurrentHashMap.class, Integer.class, Account.class) instead of TypeReference and it resulted in the same.
The jackson.core version is 2.16.1 and:
native-image --version
native-image 21.0.2 2024-01-16
GraalVM Runtime Environment Oracle GraalVM 21.0.2+13.1 (build 21.0.2+13-LTS-jvmci-23.1-b30)
Substrate VM Oracle GraalVM 21.0.2+13.1 (build 21.0.2+13-LTS, serial gc, compressed references)

I posted this to StackOverflow and got no correct answer and I realized it may need to change the Jackson Jason lib.

[cowtowncoder]

Wrong repo, will move to jackson-databind.

[cowtowncoder]

It sounds like this might be same as #4299 ? If so, will be addressed in 2.17.0 release.

[zipper01]

It sounds like this might be same as #4299 ? If so, will be addressed in 2.17.0 release.

I'm not sure but the exceptions are similar. In my code I'm using plain Java accounts = (new ObjectMapper()).convertValue(v, new TypeReference<ConcurrentHashMap<Integer, Account>>() {}); and the exception clearly points to ObjectMapper._convert. In #4299 reproducer (https://github.com/edudar/feign-native), client.getData() should reference the code public record Data(String id, String name, Set<String> sets, List<String> lists, Map<String, String> maps) {} in Data.java; but I don't know if the exact method triggering the exception is the same.

[cowtowncoder]

Maybe you can try with 2.17.0-rc1 that was just released to see if the issue is resolved?

…

On Tue, Feb 27, 2024 at 4:56 PM zipper ***@***.***> wrote: It sounds like this might be same as #4299 <#4299> ? If so, will be addressed in 2.17.0 release. I'm not sure but the exceptions are similar. In my code I'm using plain Java accounts = (new ObjectMapper()).convertValue(v, new TypeReference<ConcurrentHashMap<Integer, Account>>() {}); and the exception clearly points to ObjectMapper._convert. In #4299 <#4299> reproducer( https://github.com/edudar/feign-native), client.getData() should reference the code public record Data(String id, String name, Set<String> sets, List<String> lists, Map<String, String> maps) {} in Data.java; but I don't know the exact method triggering the exception is the same. — Reply to this email directly, view it on GitHub <#4400 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAANOGNZKQI2LC5CZHE5LI3YVZ6CXAVCNFSM6AAAAABD2ZXVSCVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSNRXHE4TAMRTGI> . You are receiving this because you commented.Message ID: ***@***.***>

[zipper01]

@cowtowncoder - I tried 2.17.0-rc1 and it worked, the issue is resolved. Thank you and the team!

[cowtowncoder]

@zipper01 Thank you for verifying!