Nishanth28 commented on code in PR #52931:
URL: https://github.com/apache/spark/pull/52931#discussion_r2554015288
##########
core/src/main/scala/org/apache/spark/api/python/PythonRunner.scala:
##########
@@ -1015,7 +1036,10 @@ private[spark] class PythonRunner(
try {
stream.readInt() match {
case length if length >= 0 =>
- PythonWorkerUtils.readBytes(length, stream)
+ val data = PythonWorkerUtils.readBytes(length, stream)
+ recordsProcessed += 1
+ totalDataReceived += length
Review Comment:
## Log Output Comparison
### BEFORE the Fix ❌
```
INFO PythonRunner: Times: total = 1250, boot = 45, init = 67, finish = 32
```
**Problems**:
- No task identification
- No batch/data metrics
- Difficult to correlate with Spark UI
### AFTER the Fix ✅
```
INFO PythonRunner: Starting Python task execution - task 83.0 in stage 32
(TID 4188)
INFO PythonRunner: Times: total = 1250, boot = 45, init = 67, finish = 32 -
Batches: 1000, Data: 2.45 MB - task 83.0 in stage 32 (TID 4188)
```
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