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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"SDK NullPointerException due to missing @odata.type field during select query","articleBody":"### Describe the bug\n\nDuring a select query for users, mapping them to the User class fails with following NPE\n\n```\njava.lang.NullPointerException: parameter node cannot be null\n\tat java.util.Objects.requireNonNull(Objects.java:246)\n\tat io.kiota.serialization.json.JsonParseNode.\u003cinit>(JsonParseNode.java:38)\n\tat io.kiota.serialization.json.JsonParseNodeFactory.createJsonParseNode(JsonParseNodeFactory.java:32)\n\tat io.kiota.serialization.json.JsonParseNode.getChildNode(JsonParseNode.java:48)\n\tat com.microsoft.graph.models.User.createFromDiscriminatorValue(User.java:30)\n\tat io.kiota.serialization.json.JsonParseNode.getObjectValue(JsonParseNode.java:248)\n\tat io.kiota.serialization.json.JsonParseNode.getCollectionOfObjectValues(JsonParseNode.java:219)\n\tat com.microsoft.graph.models.UserCollectionResponse.lambda$getFieldDeserializers$0(UserCollectionResponse.java:34)\n\tat io.kiota.serialization.json.JsonParseNode.assignFieldValues(JsonParseNode.java:301)\n\tat io.kiota.serialization.json.JsonParseNode.getObjectValue(JsonParseNode.java:249)\n\tat com.microsoft.kiota.http.OkHttpRequestAdapter.send(OkHttpRequestAdapter.java:322)\n\tat com.microsoft.graph.groups.item.members.graphuser.GraphUserRequestBuilder.get(GraphUserRequestBuilder.java:70)\n```\n\n### Expected behavior\n\nThe user(s) should be selected by the query, mapped and returned in a response object\n\n### How to reproduce\n\nCode snippet to reproduce:\n```\nfinal String groupId = \"test group id\";\nfinal GraphUserRequestBuilder request = client.groups()\n                .byGroupId(groupId)\n                .members()\n                .graphUser()\n                .get(req -> {\n                    req.queryParameters.select = \"id,name,mail\";\n                    req.queryParameters.filter = \"id in (1,2,3)\";\n                    req.queryParameters.count = true;\n                    req.headers.add(\"ConsistencyLevel\", \"eventual\");\n                    }\n                })\n```\nCode snippet to reproduce the NPE with the JsonNode\n```\nimport com.fasterxml.jackson.databind.node.JsonNodeFactory;\nimport com.fasterxml.jackson.databind.node.ObjectNode;\nimport io.kiota.serialization.json.JsonParseNode;\nimport io.kiota.serialization.json.JsonParseNodeFactory;\n\nclass Scratch {\n    static void main() {\n        try {\n            var a = new JsonParseNode(new JsonParseNodeFactory(), new ObjectNode(new JsonNodeFactory(false)));\n            var b = a.getChildNode(\"@odata.type\");\n        } catch (NullPointerException e) {\n            System.out.println(\"Exception!\");\n        }\n    }\n}\n```\nReplicating this code in Graph UI returns following example response:\n\n```\n{\n    \"@odata.context\": \"https://graph.microsoft.com/v1.0/$metadata#users(id,name,mail)\",\n    \"@odata.count\": 2,\n    \"value\": [\n        {\n            \"id\": \"id 1\",\n            \"name\": \"name 1\",\n            \"mail\": \"mail 1\"\n        },\n        {\n            \"id\": \"id 2\",\n            \"name\": \"name 2\",\n            \"mail\": \"mail 2\"\n        }\n    ]\n}\n```\n\nWhich then leads to the NPE as the SDK is expecting @odata.type field being set here\n\nhttps://github.com/microsoftgraph/msgraph-sdk-java/blob/main/src/main/java/com/microsoft/graph/generated/models/User.java\n```\n@jakarta.annotation.Nonnull\n    public static User createFromDiscriminatorValue(@jakarta.annotation.Nonnull final ParseNode parseNode) {\n        Objects.requireNonNull(parseNode);\n        final ParseNode mappingValueNode = parseNode.getChildNode(\"@odata.type\"); \u003c- NPE being caused here\n        if (mappingValueNode != null) {\n            final String mappingValue = mappingValueNode.getStringValue();\n            switch (mappingValue) {\n                case \"#microsoft.graph.agentUser\": return new AgentUser();\n            }\n        }\n        return new User();\n    }\n```\n\n### SDK Version\n\n6.63.0\n\n### Latest version known to work for scenario above?\n\n6.62.0\n\n### Known Workarounds\n\n_No response_\n\n### Debug output\n\n\u003cdetails>\u003csummary>Click to expand log\u003c/summary>\n```\n\n\u003cLog output here>\n\n```\n\u003c/details>\n\n\n### Configuration\n\n_No response_\n\n### Other information\n\n_No response_","author":{"url":"https://github.com/KonstantinMeining","@type":"Person","name":"KonstantinMeining"},"datePublished":"2026-05-06T13:51:47Z","url":"https://github.com/microsoftgraph/msgraph-sdk-java/issues/2587"}