LuciferYang commented on PR #36467:
URL: https://github.com/apache/spark/pull/36467#issuecomment-1120149831

   If `DEBUG_LEVEL=1`
   
   
https://github.com/facebook/rocksdb/blob/b7119ff818f83b54a46602ac1f23d4fe2add1bfc/db/column_family.cc#L1488-L1495
   
   ```c
   ColumnFamilySet::~ColumnFamilySet() {
     while (column_family_data_.size() > 0) {
       // cfd destructor will delete itself from column_family_data_
       auto cfd = column_family_data_.begin()->second;
       bool last_ref __attribute__((__unused__));
       last_ref = cfd->UnrefAndTryDelete();
       assert(last_ref); // this assert will lead jvm crash
     }
   ```


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