apache/hadoop · error · InvalidRequestException

Cache pool poolName does not exist.

Error message

Cache pool poolName does not exist.

What it means

Error "Cache pool poolName does not exist." thrown in apache/hadoop.

Source

Thrown at hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/CacheManager.java:856

  /**
   * Modify a cache pool.
   * 
   * Only the superuser should be able to call this function.
   *
   * @param info
   *          The info for the cache pool to modify.
   */
  public void modifyCachePool(CachePoolInfo info)
      throws IOException {
    assert namesystem.hasWriteLock(RwLockMode.FS);
    StringBuilder bld = new StringBuilder();
    try {
      CachePoolInfo.validate(info);
      String poolName = info.getPoolName();
      CachePool pool = cachePools.get(poolName);
      if (pool == null) {
        throw new InvalidRequestException("Cache pool " + poolName
            + " does not exist.");
      }
      String prefix = "";
      if (info.getOwnerName() != null) {
        pool.setOwnerName(info.getOwnerName());
        bld.append(prefix).
          append("set owner to ").append(info.getOwnerName());
        prefix = "; ";
      }
      if (info.getGroupName() != null) {
        pool.setGroupName(info.getGroupName());
        bld.append(prefix).
          append("set group to ").append(info.getGroupName());
        prefix = "; ";
      }
      if (info.getMode() != null) {
        pool.setMode(info.getMode());
        bld.append(prefix).append("set mode to " + info.getMode());

View on GitHub (pinned to 2add963021)

Solutions

1. Check the pool name with hdfs cacheadmin -listPools and correct it; create the pool if it does not exist.

When it happens

Trigger: modifyCachePool naming a pool that does not exist.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/hadoop@2add963021 (2026-08-22). Data as JSON: /api/errors/71b5f50676d54c5d. Report an issue: GitHub.