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morningman pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/doris.git


The following commit(s) were added to refs/heads/master by this push:
     new b58010c48e3 [fix](export) BufferWritable must be committed before 
deconstruct (#25185)
b58010c48e3 is described below

commit b58010c48e3213dfacb10a77ba01a6b91b3a12ee
Author: Mingyu Chen <[email protected]>
AuthorDate: Mon Oct 9 22:39:45 2023 +0800

    [fix](export) BufferWritable must be committed before deconstruct (#25185)
    
    F20231009 16:03:47.659968 3342535 string_buffer.hpp:48] Check failed: 
_now_offset == 0
    *** Check failure stack trace: ***
    @ 0x561a6f8e21e6 google::LogMessage::SendToLog()
    @ 0x561a6f8de7b0 google::LogMessage::Flush()
    @ 0x561a6f8e2a29 google::LogMessageFatal::~LogMessageFatal()
    @ 0x561a4a409233 doris::vectorized::BufferWritable::~BufferWritable()
    @ 0x561a6e202853 doris::vectorized::VCSVTransformer::write()
    @ 0x561a6e1f19ba doris::vectorized::VFileResultWriter::_write_file()
    @ 0x561a6e1f1522 doris::vectorized::VFileResultWriter::append_block()
    @ 0x561a6e121bed
    
    The error will occur in DEBUG mode, and doing export will invalid data.
    It has been covered by baidu case.
---
 be/src/vec/runtime/vcsv_transformer.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/be/src/vec/runtime/vcsv_transformer.cpp 
b/be/src/vec/runtime/vcsv_transformer.cpp
index 1cbdb7ea055..d8ff48f6e46 100644
--- a/be/src/vec/runtime/vcsv_transformer.cpp
+++ b/be/src/vec/runtime/vcsv_transformer.cpp
@@ -97,8 +97,14 @@ Status VCSVTransformer::write(const Block& block) {
             if (col_id != 0) {
                 buffer_writer.write(_column_separator.data(), 
_column_separator.size());
             }
-            RETURN_IF_ERROR(_serdes[col_id]->serialize_one_cell_to_json(
-                    *(block.get_by_position(col_id).column), i, buffer_writer, 
_options));
+            Status st = _serdes[col_id]->serialize_one_cell_to_json(
+                    *(block.get_by_position(col_id).column), i, buffer_writer, 
_options);
+            if (!st.ok()) {
+                // VectorBufferWriter must do commit before deconstruct,
+                // or it may throw DCHECK failure.
+                buffer_writer.commit();
+                return st;
+            }
         }
         buffer_writer.write(_line_delimiter.data(), _line_delimiter.size());
         buffer_writer.commit();


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