apache/hadoop · error · IOException

Block ${this} reopen failed. Unable to move meta file ${ol

Error message

Block ${this} reopen failed.  Unable to move meta file  ${oldmeta} to ${newmeta}

What it means

Error "Block ${this} reopen failed. Unable to move meta file ${oldmeta} to ${newmeta}" thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/LocalReplica.java:391

  }

  @Override
  public void bumpReplicaGS(long newGS) throws IOException {
    long oldGS = getGenerationStamp();
    final File oldmeta = getMetaFile();
    setGenerationStamp(newGS);
    final File newmeta = getMetaFile();

    // rename meta file to new GS
    if (LOG.isDebugEnabled()) {
      LOG.debug("Renaming " + oldmeta + " to " + newmeta);
    }
    try {
      // calling renameMeta on the ReplicaInfo doesn't work here
      getFileIoProvider().rename(getVolume(), oldmeta, newmeta);
    } catch (IOException e) {
      setGenerationStamp(oldGS); // restore old GS
      throw new IOException("Block " + this + " reopen failed. " +
                            " Unable to move meta file  " + oldmeta +
                            " to " + newmeta, e);
    }
  }

  @Override
  public void truncateBlock(long newLength) throws IOException {
    truncateBlock(getVolume(), getBlockFile(), getMetaFile(),
        getNumBytes(), newLength, getFileIoProvider());
  }

  @Override
  public int compareWith(ScanInfo info) {
    return info.getBlockFile().compareTo(getBlockFile());
  }

  @Override
  public void copyMetadata(URI destination) throws IOException {

View on GitHub (pinned to 2add963021)

Solutions

1. Check permissions and available space on the volume; the meta file move failed due to I/O or permission errors.
2. Inspect the volume for disk errors; if the volume is failing, remove it from dfs.datanode.data.dir and let the block re-replicate.

When it happens

Trigger: Reopening a block (append) fails because the metadata file cannot be moved from the finalized location to the RBW directory.

Common situations: Reopening a block failed because its metadata file could not be renamed, usually a disk or permission problem on the volume. Check volume health and permissions.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/4cabb3facc0a4ec7. Report an issue: GitHub.