Eric Gorelik created PARQUET-1882: ------------------------------------- Summary: Writing an all-null column and then reading it with buffered_stream aborts the process Key: PARQUET-1882 URL: https://issues.apache.org/jira/browse/PARQUET-1882 Project: Parquet Issue Type: Bug Components: parquet-cpp Affects Versions: cpp-1.5.0 Environment: Windows 10 64-bit, MSVC Reporter: Eric Gorelik
When writing a column unbuffered that contains only nulls, a 0-byte dictionary page gets written. When then reading the resulting file with buffered_stream enabled, the column reader gets the length of the page (which is 0), and then tries to read that many bytes from the underlying input stream. parquet/column_reader.cc, SerializedPageReader::NextPage {code:java} int compressed_len = current_page_header_.compressed_page_size; int uncompressed_len = current_page_header_.uncompressed_page_size; // Read the compressed data page. std::shared_ptr<Buffer> page_buffer; PARQUET_THROW_NOT_OK(stream_->Read(compressed_len, &page_buffer));{code} BufferedInputStream::Read, however, has an assertion that the bytes to read is strictly positive, so the assertion fails and aborts the process. arrow/io/buffered.cc, BufferedInputStream::Impl {code:java} Status Read(int64_t nbytes, int64_t* bytes_read, void* out) { ARROW_CHECK_GT(nbytes, 0); {code} -- This message was sent by Atlassian Jira (v8.3.4#803005)