apache/hadoop · error · IOException

Position check failed. Current block position is greater tha

Error message

Position check failed. Current block position is greater than or equal to the next block's position.
Current Block Entry:
Block ID: {}, Position: {}, Status: {}, Path: {}, StreamID: {}, Next block position: {}

What it means

Error "Position check failed. Current block position is greater than or equal to the next block's position. Current Block Entry: Block ID: {}, Position: {}, Status: {}, Path: {}, StreamID: {}, Next block position: {} " thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AzureBlobBlockManager.java:199

            current.getBlockId(), current.getPosition(), current.getStatus());
        throw new IOException("Flush failed. Block " + current.getBlockId()
            + " with position " + current.getPosition() + " has status "
            + current.getStatus() + "for path " + getAbfsOutputStream().getPath());
      }
      if (!blockEntryList.isEmpty()) {
        BlockEntry next = blockEntryList.getFirst();
        if (current.getPosition() >= next.getPosition()) {
          String errorMessage =
              "Position check failed. Current block position is greater than or equal to the next block's position.\n"
                  + "Current Block Entry:\n"
                  + "Block ID: " + current.getBlockId()
                  + ", Position: " + current.getPosition()
                  + ", Status: " + current.getStatus()
                  + ", Path: " + getAbfsOutputStream().getPath()
                  + ", StreamID: " + getAbfsOutputStream().getStreamID()
                  + ", Next block position: " + next.getPosition()
                  + "\n";
          throw new IOException(errorMessage);
        }
      }
      // Append the current block's ID to the committedBlockBuilder
      if (committedBlockEntries.length() > 0) {
        committedBlockEntries.append(COMMA);
      }
      committedBlockEntries.append(current.getBlockId());
      LOG.debug("Block {} added to committed entries.", current.getBlockId());
    }
    return true;
  }

  /**
   * Returns the block ID list.
   *
   * @return the block ID list
   */
  protected String getBlockIdToCommit() {

View on GitHub (pinned to 2add963021)

Solutions

1. Ensure a single writer per file; interleaved writers corrupt block position ordering.
2. Retry the write from a clean stream if state is corrupted.

When it happens

Trigger: The current block position is greater than or equal to the next block position, indicating block list corruption.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/f25140fe1e7e4da2. Report an issue: GitHub.