{"record":{"id":"4a88a9720a27fbe9","repo":"apache/hadoop","slug":"error-validating-ldap-user","errorCode":null,"errorMessage":"Error validating LDAP user","messagePattern":"Error validating LDAP user","errorType":"exception","errorClass":"AuthenticationException","httpStatus":401,"severity":"error","filePath":"hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/LdapAuthenticationHandler.java","lineNumber":282,"sourceCode":"          public boolean verify(String hostname, SSLSession session) {\n            return true;\n          }\n        });\n      }\n\n      tls.negotiate();\n\n      // Initialize security credentials & perform read operation for\n      // verification.\n      ctx.addToEnvironment(Context.SECURITY_AUTHENTICATION,\n          SECURITY_AUTHENTICATION);\n      ctx.addToEnvironment(Context.SECURITY_PRINCIPAL, userDN);\n      ctx.addToEnvironment(Context.SECURITY_CREDENTIALS, password);\n      ctx.lookup(userDN);\n      logger.debug(\"Authentication successful for {}\", userDN);\n\n    } catch (NamingException | IOException ex) {\n      throw new AuthenticationException(\"Error validating LDAP user\", ex);\n    } finally {\n      if (ctx != null) {\n        try {\n          ctx.close();\n        } catch (NamingException e) { /* Ignore. */\n        }\n      }\n    }\n  }\n\n  private void authenticateWithoutTlsExtension(String userDN, String password)\n      throws AuthenticationException {\n    Hashtable<String, Object> env = new Hashtable<String, Object>();\n    env.put(Context.INITIAL_CONTEXT_FACTORY,\n        \"com.sun.jndi.ldap.LdapCtxFactory\");\n    env.put(Context.PROVIDER_URL, providerUrl);\n    env.put(Context.SECURITY_AUTHENTICATION, SECURITY_AUTHENTICATION);\n    env.put(Context.SECURITY_PRINCIPAL, userDN);","sourceCodeStart":264,"sourceCodeEnd":300,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/LdapAuthenticationHandler.java#L264-L300","documentation":"Error \"Error validating LDAP 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":["Check the LDAP bind credentials and connectivity; the wrapped exception carries the directory server's reason."],"exampleFix":"Verify user DN pattern and password against the LDAP server.","handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"2add9630210752f88ceb1bb74eb65e37bf41da8e","analyzedAt":"2026-08-22T19:55:07.957Z","schemaVersion":2},"datasetVersion":"2026-08-22T20:17:22.307Z"}