cancel
Showing results for 
Search instead for 
Did you mean: 
Data Engineering
Join discussions on data engineering best practices, architectures, and optimization strategies within the Databricks Community. Exchange insights and solutions with fellow data engineers.
cancel
Showing results for 
Search instead for 
Did you mean: 

Job aborted stage failure java.sql.SQLRecoverableException: IO Error: Connection reset by peer

Sudharsan24
New Contributor II

While ingesting data from Oracle to databricks(writing into ADLS) using jdbc I am getting connection reset by peer error when ingesting a large table which has millions of rows.I am using oracle sql developer and azure databricks.

I tried every way like using partition column (lower and upper bounds), predicates and also incremental loading none of them are working, please help me if anyone knows the solution
jdbc(url=conn, table= pQuery, properties={ "user": user, "password": pwd, "driver": driver, "autoReconnect": "true", #"numPartitions": "50", "numPartitions": "20", "partitionColumn": "PARTITION_KEY", "lowerBound": lbound, "upperBound": ubound, #"fetchSize": "90000000" "fetchSize": "900000" } )

2 REPLIES 2

Rishabh-Pandey
Esteemed Contributor

Try using this code .

import pyspark
from pyspark.sql import SparkSession

# Initialize Spark session
spark = SparkSession.builder.appName("OracleToDatabricks").getOrCreate()

# Oracle connection properties
conn = "jdbc:oracle:thin:@//<host>:<port>/<service_name>"
user = "<username>"
pwd = "<password>"
driver = "oracle.jdbc.driver.OracleDriver"
pQuery = "<table_name>"
lbound = 1
ubound = 1000000
batch_size = 10000

properties = {
    "user": user,
    "password": pwd,
    "driver": driver,
    "autoReconnect": "true",
    "numPartitions": "20",
    "partitionColumn": "PARTITION_KEY",
    "lowerBound": lbound,
    "upperBound": ubound,
    "fetchSize": "10000"
}

for i in range(lbound, ubound, batch_size):
    lower_bound = i
    upper_bound = min(i + batch_size - 1, ubound)
    query = f"(SELECT * FROM {pQuery} WHERE PARTITION_KEY >= {lower_bound} AND PARTITION_KEY <= {upper_bound}) AS TEMP"
    df = spark.read.jdbc(url=conn, table=query, properties=properties)
    # Process and write the data to ADLS
    df.write.mode("append").parquet("path/to/adls")
Rishabh Pandey

Thanks for the reply, its still failing with same issue

 

Connect with Databricks Users in Your Area

Join a Regional User Group to connect with local Databricks users. Events will be happening in your city, and you won’t want to miss the chance to attend and share knowledge.

If there isn’t a group near you, start one and help create a community that brings people together.

Request a New Group