Fix LOGICAL_ERROR with max_read_buffer_size=0 during reading marks #40705
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The problem is that the buffer size validated after marks reading in MergeTreeReaderStream::init(), since it requires to read marks first. And later it is passed to AsynchronousReadBufferFromFileDescriptor, which throws LOGICAL_ERROR because buffer_size < alignment. Fix this my simply disallow such values for max_read_buffer_size (I thougt about modifying createReadBufferFromFileBase(), but it is not used for remote reads -- remote_fs_buffer_size). Fixes: ClickHouse#40669 Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
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Aug 28, 2022
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Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Fix LOGICAL_ERROR with max_read_buffer_size=0 during reading marks
The problem is that the buffer size validated after marks reading in
MergeTreeReaderStream::init(), since it requires to read marks first.
And later it is passed to AsynchronousReadBufferFromFileDescriptor,
which throws LOGICAL_ERROR because buffer_size < alignment.
Fix this my simply disallow such values for max_read_buffer_size (I
thougt about modifying createReadBufferFromFileBase(), but it is not
used for remote reads -- remote_fs_buffer_size).
Fixes: #40669 (cc @davenger )