kaijchen commented on code in PR #42680:
URL: https://github.com/apache/doris/pull/42680#discussion_r1836055939


##########
be/src/olap/delta_writer_v2.cpp:
##########
@@ -125,6 +125,9 @@ Status DeltaWriterV2::init() {
     context.partial_update_info = _partial_update_info;
     context.memtable_on_sink_support_index_v2 = true;
 
+    auto tablet = 
DORIS_TRY(ExecEnv::GetInstance()->storage_engine().get_tablet(_req.tablet_id));

Review Comment:
   DeltaWriterV2 is on the upstream BE, the tablet requested here can be on 
downstream BE.
   This causes the following problem:
   
   ```
   I20241110 23:46:32.273124  5731 pipeline_fragment_context.cpp:170] 
PipelineFragmentContext::cancel|query_id=4334341c4795459e-ade78c01be07735d|fragment_id=0|reason=[INTERNAL_ERROR]failed
 to get tablet: 14168, reason: tablet does not exist. 172.20.50.97
           0#  doris::StorageEngine::get_tablet(long) at 
/home/zcp/repo_center/doris_master/doris/be/src/common/status.h:375
           1#  doris::DeltaWriterV2::init() at 
/home/zcp/repo_center/doris_master/doris/be/src/util/expected.hpp:1986
           2#  doris::DeltaWriterV2::write(doris::vectorized::Block const*, 
std::vector<unsigned int, std::allocator<unsigned int> > const&) at 
/home/zcp/repo_center/doris_master/doris/be/src/common/status.h:499
           3#  
doris::vectorized::VTabletWriterV2::_write_memtable(std::shared_ptr<doris::vectorized::Block>,
 long, doris::vectorized::Rows const&) at 
/home/zcp/repo_center/doris_master/doris/be/src/common/status.h:388
           4#  doris::vectorized::VTabletWriterV2::write(doris::RuntimeState*, 
doris::vectorized::Block&) at 
/var/local/ldb-toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/bits/shared_ptr_base.h:701
           5#  
doris::vectorized::AsyncResultWriter::process_block(doris::RuntimeState*, 
doris::RuntimeProfile*) at 
/home/zcp/repo_center/doris_master/doris/be/src/common/status.h:499
           6#  std::_Function_handler<void (), 
doris::vectorized::AsyncResultWriter::start_writer(doris::RuntimeState*, 
doris::RuntimeProfile*)::$_0>::_M_invoke(std::_Any_data const&) at 
/var/local/ldb-toolchain/bin/../lib/gcc/x86_64-linux-gnu/11/../../../../include/c++/11/ext/atomicity.h:98
           7#  doris::ThreadPool::dispatch_thread() at 
/home/zcp/repo_center/doris_master/doris/be/src/util/threadpool.cpp:0
           8#  doris::Thread::supervise_thread(void*) at 
/var/local/ldb-toolchain/bin/../usr/include/pthread.h:562
           9#  ?
           10# ?
   ```



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