apache/hadoop · error · IOException

Null IO stream

Error message

Null IO stream

What it means

Error "Null IO stream" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/AliyunOSSInputStream.java:176

    }

    ReadBuffer readBuffer = readBufferQueue.poll();
    readBuffer.lock();
    try {
      readBuffer.await(ReadBuffer.STATUS.INIT);
      if (readBuffer.getStatus() == ReadBuffer.STATUS.ERROR) {
        this.buffer = null;
      } else {
        this.buffer = readBuffer.getBuffer();
      }
    } catch (InterruptedException e) {
      LOG.warn("interrupted when wait a read buffer");
    } finally {
      readBuffer.unlock();
    }

    if (this.buffer == null) {
      throw new IOException("Null IO stream");
    }
    position = pos;
    partRemaining = partSize;
  }

  @Override
  public synchronized int read() throws IOException {
    checkNotClosed();

    if (partRemaining <= 0 && position < contentLength) {
      reopen(position);
    }

    int byteRead = -1;
    if (partRemaining != 0) {
      byteRead = this.buffer[this.buffer.length - (int)partRemaining] & 0xFF;
    }
    if (byteRead >= 0) {

View on GitHub (pinned to 2add963021)

Solutions

1. This indicates the OSS object stream was not opened correctly; retry opening the file and verify the object exists and credentials/endpoint are valid.

When it happens

Trigger: Thrown at hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/AliyunOSSInputStream.java:176 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/76d0cc65490d9752. Report an issue: GitHub.