{"record":{"id":"88cb54744cfa8b13","repo":"phacility/phabricator","slug":"storage-engine-s-returned-an-improper-engine-id","errorCode":null,"errorMessage":"Storage engine '%s' returned an improper engine identifier '{%s}': it must be nonempty and no longer than 32 characters.","messagePattern":"Storage engine '(.+?)' returned an improper engine identifier '(.+?)': it must be nonempty and no longer than 32 characters\\.","errorType":"exception","errorClass":"PhabricatorFileStorageConfigurationException","httpStatus":null,"severity":"error","filePath":"src/applications/files/storage/PhabricatorFile.php","lineNumber":569,"sourceCode":"    $integrity_hash = $engine->newIntegrityHash($formatted_data, $format);\n\n    $data_handle = $engine->writeFile($formatted_data, $params);\n\n    if (!$data_handle || strlen($data_handle) > 255) {\n      // This indicates an improperly implemented storage engine.\n      throw new PhabricatorFileStorageConfigurationException(\n        pht(\n          \"Storage engine '%s' executed %s but did not return a valid \".\n          \"handle ('%s') to the data: it must be nonempty and no longer \".\n          \"than 255 characters.\",\n          $engine_class,\n          'writeFile()',\n          $data_handle));\n    }\n\n    $engine_identifier = $engine->getEngineIdentifier();\n    if (!$engine_identifier || strlen($engine_identifier) > 32) {\n      throw new PhabricatorFileStorageConfigurationException(\n        pht(\n          \"Storage engine '%s' returned an improper engine identifier '{%s}': \".\n          \"it must be nonempty and no longer than 32 characters.\",\n          $engine_class,\n          $engine_identifier));\n    }\n\n    return array($engine_identifier, $data_handle, $integrity_hash);\n  }\n\n\n  /**\n   * Download a remote resource over HTTP and save the response body as a file.\n   *\n   * This method respects `security.outbound-blacklist`, and protects against\n   * HTTP redirection (by manually following \"Location\" headers and verifying\n   * each destination). It does not protect against DNS rebinding. See\n   * discussion in T6755.","sourceCodeStart":551,"sourceCodeEnd":587,"githubUrl":"https://github.com/phacility/phabricator/blob/5720a38cfe95b00ca4be5016dd0d2f3195f4fa04/src/applications/files/storage/PhabricatorFile.php#L551-L587","documentation":"Error \"Storage engine '%s' returned an improper engine identifier '{%s}': it must be nonempty and no longer than 32 characters.\" thrown in phacility/phabricator.","triggerScenarios":"Thrown at src/applications/files/storage/PhabricatorFile.php:569 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"5720a38cfe95b00ca4be5016dd0d2f3195f4fa04","analyzedAt":"2026-08-21T05:07:25.672Z","schemaVersion":2},"datasetVersion":"2026-08-21T11:28:35.574Z"}