apache/hadoop · error · IOException

Negative position: {}

Error message

Negative position: {}

What it means

Error "Negative position: {}" thrown in apache/hadoop.

Source

Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java:1038

        // the return value should never be negative. 
        return 0;
      }   
      
      @Override
      public synchronized long getPos() throws IOException {
        return (position - start);
      }
      
      @Override
      public synchronized void seek(final long pos) throws IOException {
        validatePosition(pos);
        position = start + pos;
        underLyingStream.seek(position);
      }

      private void validatePosition(final long pos) throws IOException {
        if (pos < 0) {
          throw new IOException("Negative position: "+pos);
         }
         final long length = end - start;
         if (pos > length) {
           throw new IOException("Position behind the end " +
               "of the stream (length = "+length+"): " + pos);
         }
      }

      @Override
      public boolean seekToNewSource(long targetPos) throws IOException {
        // do not need to implement this
        // hdfs in itself does seektonewsource
        // while reading.
        return false;
      }
      
      /**
       * implementing position readable. 

View on GitHub (pinned to 2add963021)

Solutions

1. Pass a non-negative position to seek.
2. Clamp the computed position to [0, length] before seeking.

When it happens

Trigger: Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/HarFileSystem.java:1038 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/5032e805dab529b7. Report an issue: GitHub.