Forum Discussion
Parallelization on Fabric using TF_on Spark
LogLastModifiedTime:Wed Jan 22 20:46:14 +0000 2025 LogLength:508 LogContents: WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release WARN StatusConsoleListener The use of package scanning to locate plugins is deprecated and will be removed in a future release End of LogType:stdout.This log file belongs to a running container (container_1737578301594_0001_01_000003) and so may not be complete.
2025-01-22 20:47:34,935 ERROR TaskResources [Executor task launch worker for task 7.0 in stage 14.0 (TID 19)]: Task 19 failed by error:
org.apache.spark.api.python.PythonException: Traceback (most recent call last):
File "/opt/spark/python/lib/pyspark.zip/pyspark/worker.py", line 1248, in main
process()
File "/opt/spark/python/lib/pyspark.zip/pyspark/worker.py", line 1238, in process
out_iter = func(split_index, iterator)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 5434, in pipeline_func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 5434, in pipeline_func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 5434, in pipeline_func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 840, in func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 1795, in func
File "/home/trusted-service-user/cluster-env/clonedenv/lib/python3.11/site-packages/tensorflowonspark/TFSparkNode.py", line 511, in _train
raise Exception("Exception in worker:\n" + e_str)
Exception: Exception in worker:
Traceback (most recent call last):
File "/home/trusted-service-user/cluster-env/clonedenv/lib/python3.11/site-packages/tensorflowonspark/TFSparkNode.py", line 427, in wrapper_fn_background
wrapper_fn(args, context)
File "/home/trusted-service-user/cluster-env/clonedenv/lib/python3.11/site-packages/tensorflowonspark/TFSparkNode.py", line 421, in wrapper_fn
fn(args, context)
File "/tmp/ipykernel_13752/3281000864.py", line 23, in map_fun
File "/home/trusted-service-user/cluster-env/trident_env/lib/python3.11/site-packages/tensorflowonspark/TFNode.py", line 91, in start_cluster_server
raise Exception("DEPRECATED: Use higher-level APIs like `tf.keras` or `tf.estimator`")
Exception: DEPRECATED: Use higher-level APIs like `tf.keras` or `tf.estimator`
at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.handlePythonException(PythonRunner.scala:572)
at org.apache.spark.api.python.PythonRunner$$anon$3.read(PythonRunner.scala:784)
at org.apache.spark.api.python.PythonRunner$$anon$3.read(PythonRunner.scala:766)
at org.apache.spark.api.python.BasePythonRunner$ReaderIterator.hasNext(PythonRunner.scala:525)
at org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:37)
at scala.collection.Iterator.foreach(Iterator.scala:943)
at scala.collection.Iterator.foreach$(Iterator.scala:943)
at org.apache.spark.InterruptibleIterator.foreach(InterruptibleIterator.scala:28)
at scala.collection.generic.Growable.$plus$plus$eq(Growable.scala:62)
at scala.collection.generic.Growable.$plus$plus$eq$(Growable.scala:53)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:105)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:49)
at scala.collection.TraversableOnce.to(TraversableOnce.scala:366)
at scala.collection.TraversableOnce.to$(TraversableOnce.scala:364)
at org.apache.spark.InterruptibleIterator.to(InterruptibleIterator.scala:28)
at scala.collection.TraversableOnce.toBuffer(TraversableOnce.scala:358)
at scala.collection.TraversableOnce.toBuffer$(TraversableOnce.scala:358)
at org.apache.spark.InterruptibleIterator.toBuffer(InterruptibleIterator.scala:28)
at scala.collection.TraversableOnce.toArray(TraversableOnce.scala:345)
at scala.collection.TraversableOnce.toArray$(TraversableOnce.scala:339)
at org.apache.spark.InterruptibleIterator.toArray(InterruptibleIterator.scala:28)
at org.apache.spark.rdd.RDD.$anonfun$collect$2(RDD.scala:1056)
at org.apache.spark.SparkContext.$anonfun$runJob$5(SparkContext.scala:2603)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:93)
at org.apache.spark.TaskContext.runTaskWithListeners(TaskContext.scala:166)
at org.apache.spark.scheduler.Task.run(Task.scala:141)
at org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$4(Executor.scala:620)
at org.apache.spark.util.SparkErrorUtils.tryWithSafeFinally(SparkErrorUtils.scala:64)
at org.apache.spark.util.SparkErrorUtils.tryWithSafeFinally$(SparkErrorUtils.scala:61)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:94)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:623)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
2025-01-22 20:47:34,944 ERROR Executor [Executor task launch worker for task 7.0 in stage 14.0 (TID 19)]: Exception in task 7.0 in stage 14.0 (TID 19)
org.apache.spark.api.python.PythonException: Traceback (most recent call last):
File "/opt/spark/python/lib/pyspark.zip/pyspark/worker.py", line 1248, in main
process()
File "/opt/spark/python/lib/pyspark.zip/pyspark/worker.py", line 1238, in process
out_iter = func(split_index, iterator)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 5434, in pipeline_func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 5434, in pipeline_func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 5434, in pipeline_func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 840, in func
File "/opt/spark/python/lib/pyspark.zip/pyspark/rdd.py", line 1795, in func
File "/home/trusted-service-user/cluster-env/clonedenv/lib/python3.11/site-packages/tensorflowonspark/TFSparkNode.py", line 511, in _train
raise Exception("Exception in worker:\n" + e_str)
Exception: Exception in worker:
Traceback (most recent call last):
File "/home/trusted-service-user/cluster-env/clonedenv/lib/python3.11/site-packages/tensorflowonspark/TFSparkNode.py", line 427, in wrapper_fn_background
wrapper_fn(args, context)
File "/home/trusted-service-user/cluster-env/clonedenv/lib/python3.11/site-packages/tensorflowonspark/TFSparkNode.py", line 421, in wrapper_fn
fn(args, context)
File "/tmp/ipykernel_13752/3281000864.py", line 23, in map_fun
File "/home/trusted-service-user/cluster-env/trident_env/lib/python3.11/site-packages/tensorflowonspark/TFNode.py", line 91, in start_cluster_server
raise Exception("DEPRECATED: Use higher-level APIs like `tf.keras` or `tf.estimator`")
Exception: DEPRECATED: Use higher-level APIs like `tf.keras` or `tf.estimator`
Hi cmilanes932211 ,
Thank you for sharing the details and logs. After analyzing the errors, here’s a summary of the issues and the resolution:
1. Deprecated APIs:
--APIs like TFNode.start_cluster_server are specific to frameworks like TensorFlowOnSpark, which might be outdated or less frequently maintained.
--Modern TensorFlow applications avoid these lower-level APIs in favor of built-in, high-level abstractions like tf.keras.
2. CUDA and GPU Errors:
--The logs show that CUDA drivers are missing, and attempts to initialize GPU operations fail.
--This suggests that your environment lacks GPU support or proper drivers, causing TensorFlow to fall back to the CPU.
--Additionally, the errors about registering factories (e.g., cuFFT, cuDNN) occur due to redundant initializations of CUDA plugins.
3. Desired Output Issue:
--Despite running, the script doesn’t print "Hello, World!", which may stem from focusing solely on TensorFlow configuration instead of explicitly including the print statement.
To address these issues here is a simplified code. It ensures compatibility with your environment by explicitly disabling GPU usage (as per the missing CUDA drivers).
import os
import tensorflow as tf
# Disable GPU usage
os.environ["CUDA_VISIBLE_DEVICES"] = "-1"
def main():
print("Hello, World!")
# Verify TensorFlow is using the CPU
print("Devices available:")
for device in tf.config.list_physical_devices():
print(f" - {device.device_type}: {device.name}")
if __name__ == "__main__":
main()
This eliminates the dependency on older or deprecated components like TensorFlowOnSpark.
It uses a direct Python print statement to achieve the desired "Hello, World!" output while ensuring TensorFlow initializes properly, confirming compatibility.
Please try this solution and let us know if further assistance is required.
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly and a kudos would be appreciated.
Best Regards.
Thanks a lot, but there is an issue. Sorry for the missunderstanding.
Your code primarily disables GPU usage and lists the available devices for TensorFlow to confirm it's using the CPU. While it serves as a basic example to ensure TensorFlow is configured correctly on a local machine, it doesn't align with what I need for my use case.
My Objective
I am working on running multiple neural network models in parallel, specifically leveraging a Spark cluster in Azure Fabric to maximize cluster utilization. The goal is to:
- Execute independent TensorFlow models on Spark executors in parallel.
- Perform a proof-of-concept using a sample use case and extend it to more workloads.
Why the Code Falls Short
No Parallel Execution:
- The provided code runs a simple main() function that prints "Hello, World!" and lists TensorFlow devices. It does not demonstrate any parallel execution or utilization of multiple models or Spark resources.
Local Execution Only:
- The code is designed to run locally on a single machine and does not integrate with Spark or distribute tasks across a cluster.
No Spark Integration:
- There is no use of Spark for distributing workloads or managing parallel execution, which is critical for maximizing cluster resource utilization.
What I’m Looking For
To align with my goal, I need:
- Code that integrates TensorFlow with Spark to distribute the execution of multiple neural network models across the cluster.
- A framework or approach that maximizes the use of Spark executors and ensures TensorFlow tasks efficiently utilize the allocated resources (e.g., CPU or GPU).
If you have suggestions or examples related to running TensorFlow models in parallel on a Spark cluster, I’d greatly appreciate your input!
Hi cmilanes932211,
Thank you for providing the clarification. Regarding your questions:
- You can refer to the official documentation
Distributed training with TensorFlow 2 - Azure Databricks | Microsoft Learn - Here’s an overview of the steps you can follow:
- Please ensure your Spark cluster is properly configured with the necessary libraries for TensorFlow and distributed deep learning.
- Build your neural network model and define the training process using TensorFlow.
- Use a distribution framework like Spark-TensorFlow Distributor to parallelize and distribute the TensorFlow training tasks across Spark executors.
- Configure your cluster to maximize the use of available CPUs or GPUs for efficient execution. Adjust the number of executors and task slots based on your workload.
- Track the execution progress using Spark’s monitoring tools (e.g., Spark UI) to ensure the tasks are running efficiently and to identify any performance bottlenecks.
These steps should help you get started with running TensorFlow models in parallel on a Spark cluster.
If this helps, then please Accept it as a solution and dropping a "Kudos" so other members can find it more easily.
Thank you.Hi cmilanes932211,
I hope this information is helpful. Please let me know if you have any further questions or if you'd like to discuss this further. If this answers your question, please Accept it as a solution and give it a 'Kudos' so others can find it easily.
Thank you.
- You can refer to the official documentation
