gaodayue opened a new issue #2869: BE core when load job is cancelled URL: https://github.com/apache/incubator-doris/issues/2869 **Describe the bug** BE cores with the following stack trace. ``` #0 doris::MemTable::insert (this=0x0, tuple=0x19afbe2000) at /home/kangkaisen/palo/be/src/olap/memtable.cpp:67 #1 0x00000000014fc900 in doris::DeltaWriter::write (this=0x8ada7dd00, tuple=<optimized out>) at /home/kangkaisen/palo/be/src/olap/delta_writer.cpp:162 #2 0x0000000000ff0c1e in doris::TabletsChannel::add_batch (this=this@entry=0x14b1ec1e00, params=...) at /home/kangkaisen/palo/be/src/runtime/tablets_channel.cpp:94 #3 0x0000000000fed836 in doris::LoadChannel::add_batch (this=this@entry=0x15380d83c0, request=..., tablet_vec=tablet_vec@entry=0x84d30dd78) at /home/kangkaisen/palo/be/src/runtime/load_channel.cpp:91 #4 0x0000000000fe8b41 in doris::LoadChannelMgr::add_batch (this=0x5dcf100, request=..., tablet_vec=0x84d30dd78, wait_lock_time_ns=wait_lock_time_ns@entry=0x7f84ff0a8ee0) at /home/kangkaisen/palo/be/src/runtime/load_channel_mgr.cpp:125 #5 0x0000000001058be5 in doris::PInternalServiceImpl<palo::PInternalService>::tablet_writer_add_batch(google::protobuf::RpcController*, doris::PTabletWriterAddBatchRequest const*, doris::PTabletWriterAddBatchResult*, google::protobuf::Closure*)::{lambda()#1}::operator()() const (__closure=0x614a1d9c0) at /home/kangkaisen/palo/be/src/service/internal_service.cpp:109 ``` `_state` of `TabletsChannel` is `kFinished`, log contains message "load channel has been cancelled: 1e463d0340df7670-2f2bf1d87f86448b". Therefore it is clear that writing an already cancelled channel caused the bug.
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