apache/hadoop · error · IOException

Unable to rewind the stream

Error message

Unable to rewind the stream

What it means

Error "Unable to rewind the stream" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/RewindableInputStream.java:75

    return input.read();
  }

  @Override
  public int read(byte[] buffer, int offset, int length) throws IOException {
    return input.read(buffer, offset, length);
  }

  @Override
  public void close() throws IOException {
    input.close();
  }

  public InputStream rewind() throws IOException {
    try {
      input.reset();
      return this;
    } catch (IOException e) {
      throw new IOException("Unable to rewind the stream", e);
    }
  }
}

View on GitHub (pinned to 2add963021)

Solutions

1. Ensure the underlying stream supports mark/reset and that the mark limit was not exceeded before rewinding.

When it happens

Trigger: RewindableInputStream.reset() is called when the buffered data needed to rewind has been discarded (buffer overflow), so the stream cannot be rewound.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/b88db99c9de02288. Report an issue: GitHub.