apache/hadoop · error · RetriableException

{} still not started

Error message

{} still not started

What it means

Error "{} still not started" thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java:2374

    checkNNStartup();
    namesystem.checkOperation(OperationCategory.WRITE);
    CacheEntry cacheEntry = getCacheEntry();
    if (cacheEntry != null && cacheEntry.isSuccess()) {
      return; // Return previous response
    }
    boolean success = false;
    try {
      namesystem.removeXAttr(src, xAttr, cacheEntry != null);
      success = true;
    } finally {
      RetryCache.setState(cacheEntry, success);
    }
  }

  private void checkNNStartup() throws IOException {
    if (!this.nn.isStarted()) {
      String message = NameNode.composeNotStartedMessage(this.nn.getRole());
      throw new RetriableException(message);
    }
  }

  @Override // ClientProtocol
  public void checkAccess(String path, FsAction mode) throws IOException {
    checkNNStartup();
    namesystem.checkAccess(path, mode);
  }

  @Override // ClientProtocol
  public long getCurrentEditLogTxid() throws IOException {
    String operationName = "getCurrentEditLogTxid";
    checkNNStartup();
    namesystem.checkOperation(OperationCategory.READ); // only active
    namesystem.checkSuperuserPrivilege(operationName);
    // if it's not yet open for write, we may be in the process of transitioning
    // from standby to active and may not yet know what the latest committed
    // txid is

View on GitHub (pinned to 2add963021)

Solutions

1. Wait for the named service/role to finish starting before issuing requests to it.

When it happens

Trigger: A request arrives for a NameNode component or role that has not completed startup.

Common situations: Sending RPCs immediately after NameNode process launch, before full initialization.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/1321dd621261cc76. Report an issue: GitHub.