You must set the VECSUM_PATH environment variable to the pat

Error message

You must set the VECSUM_PATH environment variable to the path of the file to read.

What it means

Error "You must set the VECSUM_PATH environment variable to the path of the file to read. " thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs-tests/vecsum.c:176

    const char *rpc_address;
};

static struct options *options_create(void)
{
    struct options *opts = NULL;
    const char *pass_str;
    const char *ty_str;
    const char *length_str;
    int ty;

    opts = calloc(1, sizeof(struct options));
    if (!opts) {
        fprintf(stderr, "failed to calloc options\n");
        goto error;
    }
    opts->path = getenv("VECSUM_PATH");
    if (!opts->path) {
        fprintf(stderr, "You must set the VECSUM_PATH environment "
            "variable to the path of the file to read.\n");
        goto error;
    }
    length_str = getenv("VECSUM_LENGTH");
    if (!length_str) {
        length_str = "2147483648";
    }
    opts->length = atoll(length_str);
    if (!opts->length) {
        fprintf(stderr, "Can't parse VECSUM_LENGTH of '%s'.\n",
                length_str);
        goto error;
    }
    if (opts->length % VECSUM_CHUNK_SIZE) {
        fprintf(stderr, "VECSUM_LENGTH must be a multiple of '%lld'.  The "
                "currently specified length of '%lld' is not.\n",
                (long long)VECSUM_CHUNK_SIZE, (long long)opts->length);
        goto error;

View on GitHub (pinned to 2add963021)

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.

When it happens

Trigger: vecsum startup validation: the VECSUM_PATH environment variable is unset.

Common situations: User launched vecsum without configuring the required environment variables.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/3109bb939078397f. Report an issue: GitHub.