### What problem does this PR solve? Problem Summary: the partition_sorts is unique_ptr,could release after destroy. and when some extreme case like cancel, if source reset the sorter early, the sink operator will coredump still use it.
### What problem does this PR solve? Problem Summary: the partition_sorts is unique_ptr,could release after destroy. and when some extreme case like cancel, if source reset the sorter early, the sink operator will coredump still use it.