apache/hadoop · error

fuseConnectTest failed with error code %d

Error message

fuseConnectTest failed with error code %d

What it means

Error "fuseConnectTest failed with error code %d " thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/fuse-dfs/fuse_connect.c:615

  ret = fuseConnect(usrname, ctx, conn);
  free(usrname);
  return ret;
}

int fuseConnectTest(void)
{
  int ret;
  struct hdfsConn *conn;

  if (gHdfsAuthConf == AUTH_CONF_KERBEROS) {
    // TODO: call some method which can tell us whether the FS exists.  In order
    // to implement this, we have to add a method to FileSystem in order to do
    // this without valid Kerberos authentication.  See HDFS-3674 for details.
    return 0;
  }
  ret = fuseNewConnect("root", NULL, &conn);
  if (ret) {
    fprintf(stderr, "fuseConnectTest failed with error code %d\n", ret);
    return ret;
  }
  hdfsConnRelease(conn);
  return 0;
}

struct hdfs_internal* hdfsConnGetFs(struct hdfsConn *conn)
{
  return conn->fs;
}

void hdfsConnRelease(struct hdfsConn *conn)
{
  pthread_mutex_lock(&gConnMutex);
  conn->refcnt--;
  if ((conn->refcnt == 0) && (conn->condemned)) {
    fprintf(stderr, "hdfsConnRelease(usrname=%s): freeing condemend FS!\n",
      conn->usrname);

View on GitHub (pinned to 2add963021)

Solutions

1. Check the fuse-dfs connection test error code; verify Kerberos tickets (kinit), Hadoop configuration, and NameNode availability before mounting fuse-dfs.

When it happens

Trigger: Thrown at hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/fuse-dfs/fuse_connect.c:615 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/3970b4c3cd8ecde0. Report an issue: GitHub.