apache/hadoop · error · IOException

Stream is closed!

Error message

Stream is closed!

What it means

Error "Stream is closed!" thrown in apache/hadoop.

Source

Thrown at hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/OSSDataBlocks.java:782

        /**
         * After the stream is closed, set the local reference to the byte
         * buffer to null; this guarantees that future attempts to use
         * stream methods will fail.
         */
        @Override
        public synchronized void close() {
          LOG.debug("ByteBufferInputStream.close() for {}",
              ByteBufferBlock.super.toString());
          byteBuffer = null;
        }

        /**
         * Verify that the stream is open.
         * @throws IOException if the stream is closed
         */
        private void verifyOpen() throws IOException {
          if (byteBuffer == null) {
            throw new IOException(FSExceptionMessages.STREAM_IS_CLOSED);
          }
        }

        public synchronized int read() throws IOException {
          if (available() > 0) {
            return byteBuffer.get() & 0xFF;
          } else {
            return -1;
          }
        }

        @Override
        public synchronized long skip(long offset) throws IOException {
          verifyOpen();
          long newPos = position() + offset;
          if (newPos < 0) {
            throw new EOFException(FSExceptionMessages.NEGATIVE_SEEK);
          }

View on GitHub (pinned to 2add963021)

Solutions

1. Do not write to a block stream after close(); check the calling code for use-after-close.

When it happens

Trigger: Thrown at hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/OSSDataBlocks.java:782 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/97168bce923ef985. Report an issue: GitHub.