apache/hadoop · error · IOException

Error Reading IndexFile

Error message

Error Reading IndexFile

What it means

Error "Error Reading IndexFile" thrown in apache/hadoop.

Source

Thrown at hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/IndexCache.java:123

        while (isUnderConstruction(info)) {
          try {
            info.wait();
          } catch (InterruptedException e) {
            throw new IOException("Interrupted waiting for construction", e);
          }
        }
      }
      LOG.debug("IndexCache HIT: MapId " + mapId + " found");
      return info;
    }
    LOG.debug("IndexCache MISS: MapId " + mapId + " not found") ;
    SpillRecord tmp = null;
    try { 
      tmp = new SpillRecord(indexFileName, conf, expectedIndexOwner);
    } catch (Throwable e) { 
      tmp = new SpillRecord(0);
      cache.remove(mapId);
      throw new IOException("Error Reading IndexFile", e);
    } finally { 
      synchronized (newInd) { 
        newInd.mapSpillRecord = tmp;
        newInd.notifyAll();
      } 
    } 
    queue.add(mapId);
    
    if (totalMemoryUsed.addAndGet(newInd.getSize()) > totalMemoryAllowed) {
      freeIndexInformation();
    }
    return newInd;
  }

  /**
   * This method removes the map from the cache if index information for this
   * map is loaded(size>0), index information entry in cache will not be 
   * removed if it is in the loading phrase(size=0), this prevents corruption  

View on GitHub (pinned to 2add963021)

Solutions

1. The intermediate index file could not be read; rerun the map task to regenerate it and check local disk errors on the node.

When it happens

Trigger: Thrown at hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/IndexCache.java:123 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/cd3b7ef7155e5436. Report an issue: GitHub.