alamb commented on a change in pull request #8769:
URL: https://github.com/apache/arrow/pull/8769#discussion_r530339818
##########
File path: rust/benchmarks/Cargo.toml
##########
@@ -30,5 +30,5 @@ arrow = { path = "../arrow" }
parquet = { path = "../parquet" }
datafusion = { path = "../datafusion" }
structopt = { version = "0.3", default-features = false }
-tokio = { version = "0.3", features = ["macros", "rt", "rt-multi-thread"] }
+tokio = { version = "0.2", features = ["macros"] }
Review comment:
I don't think those are features in tokio 0.2 (annoyingly):
If you add them, you get the following error
```
diff --git a/rust/datafusion/Cargo.toml b/rust/datafusion/Cargo.toml
index ab11a9520..bc7b67808 100644
--- a/rust/datafusion/Cargo.toml
+++ b/rust/datafusion/Cargo.toml
@@ -57,7 +57,7 @@ chrono = "0.4"
async-trait = "0.1.41"
futures = "0.3"
pin-project-lite= "^0.2.0"
-tokio = { version = "0.2", features = ["macros"] }
+tokio = { version = "0.2", features = ["macros", "rt", "rt-multi-thread"] }
[dev-dependencies]
rand = "0.7"
```
```
error: failed to select a version for `tokio`.
... required by package `datafusion v3.0.0-SNAPSHOT
(/Users/alamb/Software/arrow2/rust/datafusion)`
versions that meet the requirements `=0.2.23` are: 0.2.23
the package `datafusion` depends on `tokio`, with features: `rt` but `tokio`
does not have these features.
```
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