xudong963 opened a new issue #1576:
URL: https://github.com/apache/arrow-datafusion/issues/1576
**Describe the bug**
During running tpch8, I got the following error:
```
➜ benchmarks git:(fix_cross_join) cargo run --release --bin tpch --
benchmark datafusion --iterations 3 --path ./data --format tbl --query 8
--batch-size 4096
Finished release [optimized] target(s) in 0.71s
Running benchmarks with the following options: DataFusionBenchmarkOpt {
query: 8, debug: false, iterations: 3, partitions: 2, batch_size: 4096, path:
"./data", file_format: "tbl", mem_table: false }
thread 'thread 'tokio-runtime-workertokio-runtime-worker' panicked at ''
panicked at 'false_values downcast failedfalse_values downcast failed', ',
datafusion/src/physical_plan/expressions/case.rsdatafusion/src/physical_plan/expressions/case.rs::218218::3030
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Error: ArrowError(ExternalError(ArrowError(ExternalError(Execution("Arrow
error: External error: oneshot canceled")))))
```
**To Reproduce**
Steps to reproduce the behavior:
**Expected behavior**
A clear and concise description of what you expected to happen.
**Additional context**
Add any other context about the problem here.
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