chore: add err message to help capture new agg ht hang (databendlabs#…

…15344)

* add err to capture new agg ht hang

* fix

* fix err info

---------

Co-authored-by: jw <[email protected]>

src/query/service/src/pipelines/processors/transforms/aggregator/new_transform_partition_bucket.rs

@@ -19,6 +19,7 @@ use std::marker::PhantomData;
 use std::sync::Arc;
 
 use bumpalo::Bump;
+use databend_common_exception::ErrorCode;
 use databend_common_exception::Result;
 use databend_common_expression::BlockMetaInfoDowncast;
 use databend_common_expression::DataBlock;
@@ -196,6 +197,7 @@ impl<Method: HashMethodBounds, V: Copy + Send + Sync + 'static>
         Ok(self.initialized_all_inputs)
     }
 
+    #[allow(unused_assignments)]
     fn add_bucket(&mut self, mut data_block: DataBlock) -> Result<(isize, usize)> {
         let (mut bucket, mut partition_count) = (0, 0);
         if let Some(block_meta) = data_block.get_meta() {
@@ -277,7 +279,16 @@ impl<Method: HashMethodBounds, V: Copy + Send + Sync + 'static>
                         (payload.bucket, payload.max_partition_count)
                     }
                 };
+            } else {
+                return Err(ErrorCode::Internal(format!(
+                    "Internal, TransformPartitionBucket only recv AggregateMeta, but got {:?}",
+                    block_meta
+                )));
             }
+        } else {
+            return Err(ErrorCode::Internal(
+                "Internal, TransformPartitionBucket only recv DataBlock with meta.",
+            ));
         }
 
         if self.all_inputs_init {