apache/hadoop · error · IndexOutOfBoundsException

Requested more bytes than destination buffer size: request l

Error message

Requested more bytes than destination buffer size: request length ={length}, with offset ={offset}; buffer capacity ={b.length - offset}

What it means

Error "Requested more bytes than destination buffer size: request length ={length}, with offset ={offset}; buffer capacity ={b.length - offset}" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/OSSDataBlocks.java:864

        }

        /**
         * Read in data.
         * @param b destination buffer
         * @param offset offset within the buffer
         * @param length length of bytes to read
         * @throws EOFException if the position is negative
         * @throws IndexOutOfBoundsException if there isn't space for the
         * amount of data requested.
         * @throws IllegalArgumentException other arguments are invalid.
         */
        @SuppressWarnings("NullableProblems")
        public synchronized int read(byte[] b, int offset, int length)
            throws IOException {
          Preconditions.checkArgument(length >= 0, "length is negative");
          Preconditions.checkArgument(b != null, "Null buffer");
          if (b.length - offset < length) {
            throw new IndexOutOfBoundsException(
                FSExceptionMessages.TOO_MANY_BYTES_FOR_DEST_BUFFER
                    + ": request length =" + length
                    + ", with offset =" + offset
                    + "; buffer capacity =" + (b.length - offset));
          }
          verifyOpen();
          if (!hasRemaining()) {
            return -1;
          }

          int toRead = Math.min(length, available());
          byteBuffer.get(b, offset, toRead);
          return toRead;
        }

        @Override
        public String toString() {
          final StringBuilder sb = new StringBuilder(

View on GitHub (pinned to 2add963021)

Solutions

1. Reduce the requested read length or enlarge the destination buffer so length <= buffer capacity - offset.

When it happens

Trigger: Thrown at hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/OSSDataBlocks.java:864 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/51dc32ab4d947c65. Report an issue: GitHub.