{"record":{"id":"986b26b8e4606910","repo":"apache/hadoop","slug":"proxy-error-fs-oss-proxy-port-set-without-fs-oss","errorCode":null,"errorMessage":"Proxy error: fs.oss.proxy.port set without fs.oss.proxy.host","messagePattern":"Proxy error: fs\\.oss\\.proxy\\.port set without fs\\.oss\\.proxy\\.host","errorType":"validation","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/AliyunOSSFileSystemStore.java","lineNumber":158,"sourceCode":"        }\n      }\n      String proxyUsername = conf.getTrimmed(PROXY_USERNAME_KEY);\n      String proxyPassword = conf.getTrimmed(PROXY_PASSWORD_KEY);\n      if ((proxyUsername == null) != (proxyPassword == null)) {\n        String msg = \"Proxy error: \" + PROXY_USERNAME_KEY + \" or \" +\n            PROXY_PASSWORD_KEY + \" set without the other.\";\n        LOG.error(msg);\n        throw new IllegalArgumentException(msg);\n      }\n      clientConf.setProxyUsername(proxyUsername);\n      clientConf.setProxyPassword(proxyPassword);\n      clientConf.setProxyDomain(conf.getTrimmed(PROXY_DOMAIN_KEY));\n      clientConf.setProxyWorkstation(conf.getTrimmed(PROXY_WORKSTATION_KEY));\n    } else if (proxyPort >= 0) {\n      String msg = \"Proxy error: \" + PROXY_PORT_KEY + \" set without \" +\n          PROXY_HOST_KEY;\n      LOG.error(msg);\n      throw new IllegalArgumentException(msg);\n    }\n\n    String endPoint = conf.getTrimmed(ENDPOINT_KEY, \"\");\n    if (StringUtils.isEmpty(endPoint)) {\n      throw new IllegalArgumentException(\"Aliyun OSS endpoint should not be \" +\n          \"null or empty. Please set proper endpoint with 'fs.oss.endpoint'.\");\n    }\n    CredentialsProvider provider =\n        AliyunOSSUtils.getCredentialsProvider(uri, conf);\n    ossClient = new OSSClient(endPoint, provider, clientConf);\n    uploadPartSize = AliyunOSSUtils.getMultipartSizeProperty(conf,\n        MULTIPART_UPLOAD_PART_SIZE_KEY, MULTIPART_UPLOAD_PART_SIZE_DEFAULT);\n\n    serverSideEncryptionAlgorithm =\n        conf.get(SERVER_SIDE_ENCRYPTION_ALGORITHM_KEY, \"\");\n\n    bucketName = uri.getHost();\n","sourceCodeStart":140,"sourceCodeEnd":176,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/AliyunOSSFileSystemStore.java#L140-L176","documentation":"Error \"Proxy error: fs.oss.proxy.port set without fs.oss.proxy.host\" thrown in apache/hadoop.","triggerScenarios":"Thrown by AliyunOSSFileSystemStore initialization when fs.oss.proxy.port is configured but fs.oss.proxy.host is not. Set fs.oss.proxy.host together with the proxy port, or remove the port setting.","commonSituations":"See trigger scenarios.","solutions":["Set fs.oss.proxy.host together with fs.oss.proxy.port, or remove the port setting if no proxy is used."],"exampleFix":"<property><name>fs.oss.proxy.host</name><value>proxy.example.com</value></property>\n<property><name>fs.oss.proxy.port</name><value>3128</value></property>","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"}