[
https://issues.apache.org/jira/browse/SPARK-51360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ramakrishna updated SPARK-51360:
--------------------------------
Description:
It looks like Spark's
*numInputRows* is wrongly calculated , it is double the number of records. This
can be very misleading in production scenarios.
Please find the screenshots attached .
I have also zipped the project which reproduces the problem
```
def insertToDeltaTable(batchDF: Dataset[NewEmployee], batchId: Long): Unit = {
println("batch ID :: "+ batchId)
println("No of records ::: "+ batchDF.count())
batchDF.write.partitionBy("systemId").format("delta").mode("append").save(deltaTablePath)
}
```
was:
The data in Partition 0 was executed twice.
Here is the reproduction code; the issue occurs every time.
It appears that the string starting with "0cool" is printed twice.
{code:java}
from pyspark.sql import SparkSession
spark = SparkSession.builder \
.appName("llm hard negs records") \
.master(f"local[8]") \
.getOrCreate()
def process_partition(index, partition):
results = []
s = 0
for _ in partition:
row = {"Result": "cool"}
results.append(row)
s += 1
print(str(index) + "cool" + str(s))
return results
data = list(range(2000))
results_rdd =
spark.sparkContext.parallelize(data).repartition(8).mapPartitionsWithIndex(process_partition)
results_df = results_rdd.toDF(["Query"])
output_path = "/tmp/bc_inputs6"
results_df.write.json(output_path, mode="overwrite")
{code}
> Spark counts the total no of records twice in forEachBatch
> ----------------------------------------------------------
>
> Key: SPARK-51360
> URL: https://issues.apache.org/jira/browse/SPARK-51360
> Project: Spark
> Issue Type: Bug
> Components: PySpark, SQL
> Affects Versions: 3.5.1
> Reporter: Ramakrishna
> Priority: Critical
> Labels: pull-request-available
>
> It looks like Spark's
> *numInputRows* is wrongly calculated , it is double the number of records.
> This can be very misleading in production scenarios.
>
> Please find the screenshots attached .
>
> I have also zipped the project which reproduces the problem
> ```
>
> def insertToDeltaTable(batchDF: Dataset[NewEmployee], batchId: Long): Unit = {
> println("batch ID :: "+ batchId)
> println("No of records ::: "+ batchDF.count())
>
> batchDF.write.partitionBy("systemId").format("delta").mode("append").save(deltaTablePath)
> }
> ```
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