apache/hadoop · error · IllegalArgumentException

jobId cannot be null

Error message

jobId cannot be null

What it means

Error "jobId cannot be null" thrown in apache/hadoop.

Source

Thrown at hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskID.java:85

  static {
    idFormat.setGroupingUsed(false);
    idFormat.setMinimumIntegerDigits(6);
  }
  
  private JobID jobId;
  private TaskType type;
  
  /**
   * Constructs a TaskID object from given {@link JobID}.
   *
   * @param jobId JobID that this tip belongs to 
   * @param type the {@link TaskType} of the task 
   * @param id the tip number
   */
  public TaskID(JobID jobId, TaskType type, int id) {
    super(id);
    if(jobId == null) {
      throw new IllegalArgumentException("jobId cannot be null");
    }
    this.jobId = jobId;
    this.type = type;
  }
  
  /**
   * Constructs a TaskInProgressId object from given parts.
   *
   * @param jtIdentifier jobTracker identifier
   * @param jobId job number 
   * @param type the TaskType 
   * @param id the tip number
   */
  public TaskID(String jtIdentifier, int jobId, TaskType type, int id) {
    this(new JobID(jtIdentifier, jobId), type, id);
  }

  /**

View on GitHub (pinned to 2add963021)

Solutions

1. Pass a non-null JobID when constructing the TaskID.

When it happens

Trigger: Thrown at hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskID.java:85 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/c2cf0ffb3709bab0. Report an issue: GitHub.