apache/hadoop · error · IllegalArgumentException

filters cannot be or-ed

Error message

filters cannot be or-ed

What it means

Error "filters cannot be or-ed" thrown in apache/hadoop.

Source

Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/bloom/CountingBloomFilter.java:252

      return res;
    } else {
      return 0;
    }
  }

  @Override
  public void not() {
    throw new UnsupportedOperationException("not() is undefined for "
        + this.getClass().getName());
  }

  @Override
  public void or(Filter filter) {
    if(filter == null
        || !(filter instanceof CountingBloomFilter)
        || filter.vectorSize != this.vectorSize
        || filter.nbHash != this.nbHash) {
      throw new IllegalArgumentException("filters cannot be or-ed");
    }

    CountingBloomFilter cbf = (CountingBloomFilter)filter;

    int sizeInWords = buckets2words(vectorSize);
    for(int i = 0; i < sizeInWords; i++) {
      this.buckets[i] |= cbf.buckets[i];
    }
  }

  @Override
  public void xor(Filter filter) {
    throw new UnsupportedOperationException("xor() is undefined for "
        + this.getClass().getName());
  }

  @Override
  public String toString() {

View on GitHub (pinned to 2add963021)

Solutions

1. or() requires another CountingBloomFilter with identical size and hash parameters. Pass a compatible CountingBloomFilter instance.

When it happens

Trigger: Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/bloom/CountingBloomFilter.java:252 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/61d19a495a779300. Report an issue: GitHub.