apache/hadoop · error · IOException

Asked for {} Got: {}

Error message

Asked for {} Got: {}

What it means

Error "Asked for {} Got: {}" thrown in apache/hadoop.

Source

Thrown at hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/IFile.java:429

      }
      if (currentValueLength < 0) {
        throw new IOException("Rec# " + recNo + ": Negative value-length: " + 
                              currentValueLength);
      }
            
      return true;
    }
    
    public boolean nextRawKey(DataInputBuffer key) throws IOException {
      if (!positionToNextRecord(dataIn)) {
        return false;
      }
      if (keyBytes.length < currentKeyLength) {
        keyBytes = new byte[currentKeyLength << 1];
      }
      int i = readData(keyBytes, 0, currentKeyLength);
      if (i != currentKeyLength) {
        throw new IOException ("Asked for " + currentKeyLength + " Got: " + i);
      }
      key.reset(keyBytes, currentKeyLength);
      bytesRead += currentKeyLength;
      return true;
    }
    
    public void nextRawValue(DataInputBuffer value) throws IOException {
      final int targetSize = currentValueLength << 1;

      final byte[] valBytes = (value.getData().length < currentValueLength)
        ? new byte[targetSize < 0 ? ARRAY_MAX_SIZE : targetSize]
        : value.getData();
      int i = readData(valBytes, 0, currentValueLength);
      if (i != currentValueLength) {
        throw new IOException ("Asked for " + currentValueLength + " Got: " + i);
      }
      value.reset(valBytes, currentValueLength);
      

View on GitHub (pinned to 2add963021)

Solutions

1. The IFile data read does not match the expected length; treat the spill as corrupt, retry the task, and check for disk corruption or mixed-version writes.

When it happens

Trigger: Thrown at hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/IFile.java:429 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/3dfbb42a50aeaba5. Report an issue: GitHub.