apache/hadoop · error · ServiceFailedException

Failed to start backup services

Error message

Failed to start backup services

What it means

Error "Failed to start backup services" thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/BackupState.java:53

  }

  @Override // HAState
  public void checkOperation(HAContext context, OperationCategory op)
      throws StandbyException {
    context.checkOperation(op);
  }

  @Override // HAState
  public boolean shouldPopulateReplQueues() {
    return false;
  }

  @Override // HAState
  public void enterState(HAContext context) throws ServiceFailedException {
    try {
      context.startActiveServices();
    } catch (IOException e) {
      throw new ServiceFailedException("Failed to start backup services", e);
    }
  }

  @Override // HAState
  public void exitState(HAContext context) throws ServiceFailedException {
    try {
      context.stopActiveServices();
    } catch (IOException e) {
      throw new ServiceFailedException("Failed to stop backup services", e);
    }
  }

  @Override // HAState
  public void prepareToExitState(HAContext context) throws ServiceFailedException {
    context.prepareToStopStandbyServices();
  }
}

View on GitHub (pinned to 2add963021)

Solutions

1. Check the BackupNode log for the underlying cause (checkpoint dir, RPC bind failure, registration error) and fix the configuration.
2. Verify dfs.namenode.backup.address / http-address ports are free and the checkpoint directories are valid.

When it happens

Trigger: NameNode transition to backup state when backup services (Checkpoint/BackupNode components) fail to start.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/5b53d76ec6330ac6. Report an issue: GitHub.