{"record":{"id":"38f884b136b69e8b","repo":"apache/hadoop","slug":"no-nodetype-for-ident-38f884","errorCode":null,"errorMessage":"No nodetype for {ident}","messagePattern":"No nodetype for (.+?)","errorType":"exception","errorClass":"IOException","httpStatus":null,"severity":"error","filePath":"hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/join/Parser.java","lineNumber":208,"sourceCode":"    }\n  }\n\n@SuppressWarnings(\"unchecked\")\n@InterfaceAudience.Public\n@InterfaceStability.Evolving\npublic abstract static class Node extends ComposableInputFormat {\n    /**\n     * Return the node type registered for the particular identifier.\n     * By default, this is a CNode for any composite node and a WNode\n     * for &quot;wrapped&quot; nodes. User nodes will likely be composite\n     * nodes.\n     * @see #addIdentifier(java.lang.String, java.lang.Class[], java.lang.Class, java.lang.Class)\n     * @see CompositeInputFormat#setFormat(org.apache.hadoop.mapred.JobConf)\n     */\n    static Node forIdent(String ident) throws IOException {\n      try {\n        if (!nodeCstrMap.containsKey(ident)) {\n          throw new IOException(\"No nodetype for \" + ident);\n        }\n        return nodeCstrMap.get(ident).newInstance(ident);\n      } catch (IllegalAccessException e) {\n        throw new IOException(e);\n      } catch (InstantiationException e) {\n        throw new IOException(e);\n      } catch (InvocationTargetException e) {\n        throw new IOException(e);\n      }\n    }\n\n    private static final Class<?>[] ncstrSig = { String.class };\n    private static final\n        Map<String,Constructor<? extends Node>> nodeCstrMap =\n        new HashMap<String,Constructor<? extends Node>>();\n    protected static final Map<String,Constructor<? extends \n        ComposableRecordReader>> rrCstrMap =\n        new HashMap<String,Constructor<? extends ComposableRecordReader>>();","sourceCodeStart":190,"sourceCodeEnd":226,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/join/Parser.java#L190-L226","documentation":"Error \"No nodetype for {ident}\" thrown in apache/hadoop.","triggerScenarios":"Thrown by Parser.CNode when evaluating the join expression finds an identifier with no associated stream/node definition. Define every identifier used in the join expression as an input stream before the join operator references it.","commonSituations":"See trigger scenarios.","solutions":["Define the identifier before referencing it: each stream/node name in the join expression must be introduced with its InputFormat and path first.","Check for typos in {ident} within the composite join expression."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"2add9630210752f88ceb1bb74eb65e37bf41da8e","analyzedAt":"2026-08-22T19:55:07.957Z","schemaVersion":2},"datasetVersion":"2026-08-23T01:17:44.959Z"}