{"record":{"id":"3109bb939078397f","repo":"apache/hadoop","slug":"you-must-set-the-vecsum-path-environment-variable","errorCode":null,"errorMessage":"You must set the VECSUM_PATH environment variable to the path of the file to read.\n","messagePattern":"You must set the VECSUM_PATH environment variable to the path of the file to read\\.\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs-tests/vecsum.c","lineNumber":176,"sourceCode":"    const char *rpc_address;\n};\n\nstatic struct options *options_create(void)\n{\n    struct options *opts = NULL;\n    const char *pass_str;\n    const char *ty_str;\n    const char *length_str;\n    int ty;\n\n    opts = calloc(1, sizeof(struct options));\n    if (!opts) {\n        fprintf(stderr, \"failed to calloc options\\n\");\n        goto error;\n    }\n    opts->path = getenv(\"VECSUM_PATH\");\n    if (!opts->path) {\n        fprintf(stderr, \"You must set the VECSUM_PATH environment \"\n            \"variable to the path of the file to read.\\n\");\n        goto error;\n    }\n    length_str = getenv(\"VECSUM_LENGTH\");\n    if (!length_str) {\n        length_str = \"2147483648\";\n    }\n    opts->length = atoll(length_str);\n    if (!opts->length) {\n        fprintf(stderr, \"Can't parse VECSUM_LENGTH of '%s'.\\n\",\n                length_str);\n        goto error;\n    }\n    if (opts->length % VECSUM_CHUNK_SIZE) {\n        fprintf(stderr, \"VECSUM_LENGTH must be a multiple of '%lld'.  The \"\n                \"currently specified length of '%lld' is not.\\n\",\n                (long long)VECSUM_CHUNK_SIZE, (long long)opts->length);\n        goto error;","sourceCodeStart":158,"sourceCodeEnd":194,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs-tests/vecsum.c#L158-L194","documentation":"Error \"You must set the VECSUM_PATH environment variable to the path of the file to read.\n\" thrown in apache/hadoop.","triggerScenarios":"vecsum startup validation: the VECSUM_PATH environment variable is unset.","commonSituations":"User launched vecsum without configuring the required environment variables.","solutions":["Export VECSUM_PATH pointing to the file to read, e.g. export VECSUM_PATH=/tmp/testfile (or an HDFS path for libhdfs/zcr modes).","Create the target file first so the benchmark has data to read."],"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":"2026-08-22T20:17:22.307Z"}