{"record":{"id":"66f8c2c5222dee8e","repo":"apache/hadoop","slug":"unable-to-determine-current-user","errorCode":null,"errorMessage":"Unable to determine current user","messagePattern":"Unable to determine current user","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java","lineNumber":296,"sourceCode":"\n    public boolean isParserRestricted() {\n      return restrictParser;\n    }\n\n    @Override\n    public String toString() {\n      return name;\n    }\n\n    private static boolean getRestrictParserDefault(Object resource) {\n      if (resource instanceof String || !UserGroupInformation.isInitialized()) {\n        return false;\n      }\n      UserGroupInformation user;\n      try {\n        user = UserGroupInformation.getCurrentUser();\n      } catch (IOException e) {\n        throw new RuntimeException(\"Unable to determine current user\", e);\n      }\n      return user.getRealUser() != null;\n    }\n  }\n  \n  /**\n   * List of configuration resources.\n   */\n  private ArrayList<Resource> resources = new ArrayList<Resource>();\n  \n  /**\n   * The value reported as the setting resource when a key is set\n   * by code rather than a file resource by dumpConfiguration.\n   */\n  static final String UNKNOWN_RESOURCE = \"Unknown\";\n\n\n  /**","sourceCodeStart":278,"sourceCodeEnd":314,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java#L278-L314","documentation":"Error \"Unable to determine current user\" thrown in apache/hadoop.","triggerScenarios":"Raised at runtime when the documented precondition or configuration requirement for this operation is violated.","commonSituations":"Misconfigured or missing property, invalid user input, or calling the API before its prerequisites are met.","solutions":["Ensure the SecurityContext/UserGroupInformation is initialized (call UserGroupInformation.loginUserFromSubject or run within an authenticated context) before retrieving the current user."],"exampleFix":"UserGroupInformation.getCurrentUser() after a successful login.","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"}