apache/hadoop · error · IOException

Failed to move block file for ${this} from ${srcfile} to ${d

Error message

Failed to move block file for ${this} from ${srcfile} to ${destfile.getAbsolutePath()}

What it means

renameFile() wraps failures of FileIoProvider.rename while moving a block file — e.g., renameData(destURI) relocating a block during lazy-persist spill from RAM_DISK to disk or other finalized moves. The original IOException from the rename (destination missing, permission denied, ENOSPC, read-only or cross-device semantics) is chained as the cause of the new IOException naming src and dest.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/LocalReplica.java:341

    return getMetaFile().length();
  }

  @Override
  public boolean renameMeta(URI destURI) throws IOException {
    return renameFile(getMetaFile(), new File(destURI));
  }

  @Override
  public boolean renameData(URI destURI) throws IOException {
    return renameFile(getBlockFile(), new File(destURI));
  }

  private boolean renameFile(File srcfile, File destfile) throws IOException {
    try {
      getFileIoProvider().rename(getVolume(), srcfile, destfile);
      return true;
    } catch (IOException e) {
      throw new IOException("Failed to move block file for " + this
          + " from " + srcfile + " to " + destfile.getAbsolutePath(), e);
    }
  }

  @Override
  public void updateWithReplica(StorageLocation replicaLocation) {
    // for local replicas, the replica location is assumed to be a file.
    File diskFile = null;
    try {
      diskFile = new File(replicaLocation.getUri());
    } catch (IllegalArgumentException e) {
      diskFile = null;
    }

    if (null == diskFile) {
      setDirInternal(null);
    } else {
      setDirInternal(diskFile.getParentFile());

View on GitHub (pinned to 2add963021)

Solutions

Check the destination volume for space (`df -h`) and read-only mounts; free space or remount read-write and retry.
Verify ownership/permissions on the destination directory tree and fix with chown/chmod for the DataNode user.
Confirm the destination directory exists and the volume is still mounted (`mount`, ls of the volume root) before retrying.
For lazy-persist spills, ensure the fallback disk volume has capacity and is writable (dfs.datanode.data.dir on disk, not only ram_disk).

Defensive patterns

Strategy: try-catch

Validate before calling

File dest = new File(destURI);
if (!dest.getParentFile().isDirectory() || !dest.getParentFile().canWrite()) {
  // destination dir missing or not writable: fix before renameData
}

Try / catch

try {
  replica.renameData(destURI);
} catch (IOException e) {
  // e.getCause() holds the real rename failure: check dest dir, perms, df -h, mount state;
  // fix and retry once; do not lose the block — keep the source until rename succeeds
}

Prevention

Ensure destination volumes have free space and write permissions before lazy-persist spill or block moves
Mount data volumes read-write and verify they stay mounted during long-running operations
Monitor disk-full conditions on all volumes that receive renamed block files

When it happens

Trigger: renameData()/renameFile where the destination directory does not exist, the destination volume is read-only or full, permissions changed under the DataNode, or the volume was unmounted mid-operation.

Common situations: Lazy-persist writes spilling from RAM_DISK to a full or read-only disk; destination finalized subdir missing after partial volume cleanup; permission drift on data dirs; volume unmounted between check and rename.

Related errors

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/bb1f98b60e772f8d. Report an issue: GitHub.