apache/hadoop · error · DiskOutOfSpaceException

No more available volumes

Error message

No more available volumes

What it means

Error "No more available volumes" thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/AvailableSpaceVolumeChoosingPolicy.java:119

  
  @Override
  public Configuration getConf() {
    // Nothing to do. Only added to fulfill the Configurable contract.
    return null;
  }
  
  private final VolumeChoosingPolicy<V> roundRobinPolicyBalanced =
      new RoundRobinVolumeChoosingPolicy<V>();
  private final VolumeChoosingPolicy<V> roundRobinPolicyHighAvailable =
      new RoundRobinVolumeChoosingPolicy<V>();
  private final VolumeChoosingPolicy<V> roundRobinPolicyLowAvailable =
      new RoundRobinVolumeChoosingPolicy<V>();

  @Override
  public V chooseVolume(List<V> volumes, long replicaSize, String storageId)
      throws IOException {
    if (volumes.size() < 1) {
      throw new DiskOutOfSpaceException("No more available volumes");
    }
    // As all the items in volumes are with the same storage type,
    // so only need to get the storage type index of the first item in volumes
    StorageType storageType = volumes.get(0).getStorageType();
    int index = storageType != null ?
            storageType.ordinal() : StorageType.DEFAULT.ordinal();

    synchronized (syncLocks[index]) {
      return doChooseVolume(volumes, replicaSize, storageId);
    }
  }

  private V doChooseVolume(final List<V> volumes, long replicaSize,
      String storageId) throws IOException {
    AvailableSpaceVolumeList volumesWithSpaces =
        new AvailableSpaceVolumeList(volumes);
    
    if (volumesWithSpaces.areAllVolumesWithinFreeSpaceThreshold()) {

View on GitHub (pinned to 2add963021)

Solutions

1. Free disk space on the DataNode volumes or add new storage directories to dfs.datanode.data.dir.
2. Check for failed volumes marked offline and replace the disks.
3. Adjust the available-space threshold or switch the volume choosing policy if skew causes premature exhaustion.

When it happens

Trigger: Block allocation when the available-space volume choosing policy finds no volume with enough usable space for the new block.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/cfa00293c48ec2cb. Report an issue: GitHub.