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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"JsonSchemaValidator fails to load schema in OSGi environments","articleBody":"**Bug description**\nWhen I try to run the MCP Server with version 2.0.0-M3 it does not start, because it can't find the schema.\n```\n SchemaRegistry :775 |  Failed to load json schema from https://json-schema.org/draft/2020-12/schema\njava.io.FileNotFoundException: classpath:draft/2020-12/schema\n        at com.networknt.schema.resource.ClasspathResourceLoader.lambda$getResource$0(ClasspathResourceLoader.java:75)\n        at com.networknt.schema.SchemaRegistry.getMappedSchema(SchemaRegistry.java:749)\n        at com.networknt.schema.SchemaRegistry.loadSchema(SchemaRegistry.java:734)\n        at com.networknt.schema.SchemaRegistry.getSchema(SchemaRegistry.java:649)\n        at io.modelcontextprotocol.json.schema.jackson3.DefaultJsonSchemaValidator.\u003cinit\u003e(DefaultJsonSchemaValidator.java:54)\n```\n\n**Environment**\nSDK: 2.0.0-M3\n\n**Steps to reproduce**\n- Try to start the server\n\n**Expected behavior**\n- Server should start normally","author":{"url":"https://github.com/tim-schneider-elo","@type":"Person","name":"tim-schneider-elo"},"datePublished":"2026-06-01T08:48:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/992/java-sdk/issues/992"}