{"record":{"id":"c7623974d73351af","repo":"apache/iceberg","slug":"failed-to-scan-delegate-parser-in","errorCode":null,"errorMessage":"Failed to scan delegate parser in {}: ","messagePattern":"Failed to scan delegate parser in (.+?): ","errorType":"console","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/ExtendedParser.java","lineNumber":99,"sourceCode":"\n    return null;\n  }\n\n  private static ParserInterface getNextDelegateParser(ParserInterface parser) {\n    try {\n      Class<?> clazz = parser.getClass();\n      while (clazz != null) {\n        for (Field field : clazz.getDeclaredFields()) {\n          field.setAccessible(true);\n          Object value = field.get(parser);\n          if (value instanceof ParserInterface && value != parser) {\n            return (ParserInterface) value;\n          }\n        }\n        clazz = clazz.getSuperclass();\n      }\n    } catch (Exception e) {\n      log().warn(\"Failed to scan delegate parser in {}: \", parser.getClass().getName(), e);\n    }\n\n    return null;\n  }\n\n  private static Logger log() {\n    return LoggerFactory.getLogger(ExtendedParser.class);\n  }\n\n  List<RawOrderField> parseSortOrder(String orderString) throws AnalysisException;\n}\n","sourceCodeStart":81,"sourceCodeEnd":111,"githubUrl":"https://github.com/apache/iceberg/blob/86d9c8fc543e7c56c9f624eb725f76c9baff9570/spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/ExtendedParser.java#L81-L111","documentation":"ExtendedParser scans a Spark parser object's class hierarchy for an embedded delegate ParserInterface so its SQL can be re-parsed. When reflection cannot find or access such a field, it logs this warning and returns null instead of throwing, since the enclosing operation can usually proceed without delegate extraction.","triggerScenarios":"Calling ExtendedParser.findParser (via getNextDelegateParser) on a Spark parser implementation whose class hierarchy exposes no field assignable to ParserInterface, or where accessing the field throws (SecurityException, IllegalAccessException).","commonSituations":"Spark version upgrades that restructure the internal parser delegation chain; custom Spark builds or shaded Spark distributions where field layout differs; running under a SecurityManager that blocks reflective access.","solutions":["Verify the Spark version is one supported by the Iceberg spark/v3.5 module; internal parser fields are version-specific.","Check the WARN log's attached exception stack to see whether it is NoSuchFieldException (expected, harmless) vs SecurityException (fix JVM security policy).","If the warning is benign noise on your Spark build, ignore it — the method returns null and callers fall back gracefully.","File/track an Iceberg issue if a newer Spark minor release changed parser internals so the reflection targets can be updated."],"exampleFix":"// before: reflection fails on unexpected Spark internals\nParserInterface delegate = ExtendedParser.findParser(sqlParser);\n// after: guard for null and fall back\nParserInterface delegate = ExtendedParser.findParser(sqlParser);\nif (delegate == null) {\n  // proceed without delegate re-parsing\n}","handlingStrategy":"fallback","validationCode":"ParserInterface delegate = ExtendedParser.findParser(sqlParser);\nif (delegate == null) { /* proceed without delegate re-parsing */ }","typeGuard":"if (delegate instanceof ParserInterface p) { use(p); }","tryCatchPattern":"try { delegate = ExtendedParser.findParser(parser); } catch (RuntimeException e) { delegate = null; }","preventionTips":["Pin to Spark versions the Iceberg v3.5 module was built against.","Treat null return as normal fallback, not an error condition.","Watch Iceberg release notes for Spark internal parser compatibility fixes."],"tags":["spark","reflection","logging"],"backgroundTag":"deprecated-api-usage","analyzedSha":"86d9c8fc543e7c56c9f624eb725f76c9baff9570","analyzedAt":"2026-09-12T00:46:39.097Z","contentChangedAt":"2026-09-12T00:46:39.097Z","schemaVersion":2},"datasetVersion":"2026-09-14T16:17:12.679Z"}