apache/hadoop · error · IllegalArgumentException

Job priority cannot be null.

Error message

Job priority cannot be null.

What it means

Error "Job priority 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/JobStatus.java:260

  protected synchronized void setSetupProgress(float p) { 
    this.setupProgress = (float) Math.min(1.0, Math.max(0.0, p)); 
  }

  /**
   * Sets the reduce progress of this Job
   * @param p The value of reduce progress to set to
   */
  protected synchronized void setReduceProgress(float p) { 
    this.reduceProgress = (float) Math.min(1.0, Math.max(0.0, p)); 
  }
    
  /**
   * Set the priority of the job, defaulting to NORMAL.
   * @param jp new job priority
   */
  protected synchronized void setPriority(JobPriority jp) {
    if (jp == null) {
      throw new IllegalArgumentException("Job priority cannot be null.");
    }
    priority = jp;
  }
  
  /** 
   * Set the finish time of the job
   * @param finishTime The finishTime of the job
   */
  protected synchronized void setFinishTime(long finishTime) {
    this.finishTime = finishTime;
  }

  /**
   * Set the job history file url for a completed job
   */
  protected synchronized void setHistoryFile(String historyFile) {
    this.historyFile = historyFile;
  }

View on GitHub (pinned to 2add963021)

Solutions

1. Provide a non-null JobPriority when constructing or updating the JobStatus.

When it happens

Trigger: Thrown at hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/JobStatus.java:260 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/65be2d628b52dc2e. Report an issue: GitHub.