apache/hadoop · error · IOException

e.toString()

Error message

e.toString()

What it means

Error "e.toString()" thrown in apache/hadoop.

Source

Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlConnection.java:73

  @Override
  public void connect() throws IOException {
    Preconditions.checkState(is == null, "Already connected");
    try {
      LOG.debug("Connecting to {}", url);
      URI uri = url.toURI();
      FileSystem fs = FileSystem.get(uri, conf);
      // URI#getPath returns null value if path contains relative path
      // i.e file:root/dir1/file1
      // So path can not be constructed from URI.
      // We can only use schema specific part in URI.
      // Uri#isOpaque return true if path is relative.
      if(uri.isOpaque() && uri.getScheme().equals("file")) {
        is = fs.open(new Path(uri.getSchemeSpecificPart()));
      } else {
        is = fs.open(new Path(uri));
      }
    } catch (URISyntaxException e) {
      throw new IOException(e.toString());
    }
  }

  @Override
  public InputStream getInputStream() throws IOException {
    if (is == null) {
      connect();
    }
    return is;
  }

}

View on GitHub (pinned to 2add963021)

Solutions

1. Check the URL and that the FsUrlStreamHandlerFactory is registered.
2. Inspect the exception text for connection or authentication failure details.

When it happens

Trigger: Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlConnection.java:73 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/53a1ff5dc96b7cf6. Report an issue: GitHub.