ritchie46 commented on code in PR #5383:
URL: https://github.com/apache/arrow-rs/pull/5383#discussion_r1485676362


##########
object_store/src/client/retry.rs:
##########
@@ -263,7 +262,7 @@ impl RetryExt for reqwest::RequestBuilder {
                             do_retry = true
                         } else if let Some(source) = e.source() {
                             if let Some(e) = 
source.downcast_ref::<hyper::Error>() {
-                                if e.is_connect() || e.is_closed() || 
e.is_incomplete_message() {
+                                if !(e.is_parse() || e.is_parse_status() || 
e.is_parse_too_large() || e.is_user() || e.is_canceled()) {

Review Comment:
   > stalling
   
   Right. So we call multiple ranges (e.g. columns) here: 
https://github.com/pola-rs/polars/blob/81bd89cde7d5639e8567e9548e5529130bdd5c94/crates/polars-io/src/parquet/async_impl.rs#L66C9-L66C32
   
   Where the semaphore logic is a generic utility here: 
https://github.com/pola-rs/polars/blob/81bd89cde7d5639e8567e9548e5529130bdd5c94/crates/polars-io/src/pl_async.rs#L15
   
   As I understand it the semaphore waits with a task until it has enough 
permits. 
   
   



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