apache/hadoop · error · IOException

Asked for {currentValueLength} Got: {i}

Error message

Asked for {currentValueLength} Got: {i}

What it means

Error "Asked for {currentValueLength} Got: {i}" 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:444

      }
      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);
      
      // Record the bytes read
      bytesRead += currentValueLength;

      ++recNo;
      ++numRecordsRead;
    }
    
    public void close() throws IOException {
      // Close the underlying stream
      in.close();
      
      // Release the buffer
      dataIn = null;
      buffer = null;
      if(readRecordsCounter != null) {

View on GitHub (pinned to 2add963021)

Solutions

1. The IFile value record length mismatches what was requested; retry the task and verify no concurrent modification or corruption of spill files occurred.

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:444 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/c73fb6f2a6220bba. Report an issue: GitHub.