apache/hadoop · error · IllegalArgumentException

Negative length [{}]

Error message

Negative length [{}]

What it means

Error "Negative length [{}]" thrown in apache/hadoop.

Source

Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java:927

   * since archive files are part of bigger part files.
   */
  private static class HarFSDataInputStream extends FSDataInputStream {
    /**
     * Create an input stream that fakes all the reads/positions/seeking.
     */
    private static class HarFsInputStream extends FSInputStream
        implements CanSetDropBehind, CanSetReadahead {
      private long position, start, end;
      //The underlying data input stream that the
      // underlying filesystem will return.
      private final FSDataInputStream underLyingStream;
      //one byte buffer
      private final byte[] oneBytebuff = new byte[1];
      
      HarFsInputStream(FileSystem fs, Path path, long start,
          long length, int bufferSize) throws IOException {
        if (length < 0) {
          throw new IllegalArgumentException("Negative length ["+length+"]");
        }
        underLyingStream = fs.open(path, bufferSize);
        underLyingStream.seek(start);
        // the start of this file in the part file
        this.start = start;
        // the position pointer in the part file
        this.position = start;
        // the end pointer in the part file
        this.end = start + length;
      }
      
      @Override
      public synchronized int available() throws IOException {
        long remaining = end - underLyingStream.getPos();
        if (remaining > Integer.MAX_VALUE) {
          return Integer.MAX_VALUE;
        }
        return (int) remaining;

View on GitHub (pinned to 2add963021)

Solutions

1. Pass a non-negative length to the read call.
2. Validate the computed length before calling read; a negative value indicates an offset/length arithmetic bug.

When it happens

Trigger: Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java:927 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/270d7269cb5491f4. Report an issue: GitHub.