sagemaker job failing in transformation step

[NEIA20]

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System Information

• Framework (e.g. TensorFlow) / Algorithm (e.g. KMeans): Tensorflow
• Framework Version: 1.12.0
• Python Version: Python 3.6.8
• CPU or GPU: CPU
• Python SDK Version: 1.18.13
• Are you using a custom image: No

Describe the problem

We're using sagemaker to parallelize a tensorflow job. We create a model using tensorflow. Training completes successfully. When the job moves on to transformation, it fails with an error: “Unable to get response from algorithm.”

Minimal repro / logs

Stack trace:

 File "/home/abexecutor/ml-conversion/dcs-analytics/ML_models/sage_maker_job_runner.py", line 160, in _predict
 transformer.wait()
 File "/home/abexecutor/Environments/ml_py_36/lib/python3.6/site-packages/sagemaker/transformer.py", line 135, in wait
 self.latest_transform_job.wait()
 File "/home/abexecutor/Environments/ml_py_36/lib/python3.6/site-packages/sagemaker/transformer.py", line 209, in wait
 self.sagemaker_session.wait_for_transform_job(self.job_name)
 File "/home/abexecutor/Environments/ml_py_36/lib/python3.6/site-packages/sagemaker/session.py", line 886, in wait_for_transform_job
 self._check_job_status(job, desc, 'TransformJobStatus')
 File "/home/abexecutor/Environments/ml_py_36/lib/python3.6/site-packages/sagemaker/session.py", line 908, in _check_job_status
 raise ValueError('Error for {} {}: {} Reason: {}'.format(job_type, job, status, reason))
ValueError: Error for Transform job sagemaker-tensorflow-2019-04-16-20-36-36-284: Failed Reason: AlgorithmError: See job logs for more information

Transformation logs:

2019-04-16T20:39:55.259:[sagemaker logs]: MaxConcurrentTransforms=100, MaxPayloadInMB=1, BatchStrategy=SINGLE_RECORD

#011at java.lang.Thread.run(Thread.java:748)2019-04-16T20:40:23.253:[sagemaker logs]: normalizedetl/ml-clicks-lookalike/campaign-1863917904632580551/1555446017448/test/testing_data_encoded_mean_aligned_0_2_1.csv: Unable to get response from algorithm
#011at java.lang.Thread.run(Thread.java:748)2019-04-16T20:40:23.253:[sagemaker logs]: normalizedetl/ml-clicks-lookalike/campaign-1863917904632580551/1555446017448/test/testing_data_encoded_mean_aligned_0_2_1.csv: Unable to get response from algorithm
#011at java.lang.Thread.run(Thread.java:748)2019-04-16T20:40:23.289:[sagemaker logs]: normalizedetl/ml-clicks-lookalike/campaign-1863917904632580551/1555446017448/test/testing_data_encoded_mean_aligned_0_2_1.csv: Unable to get response from algorithm

• Exact command to reproduce:

Tensorflow model settings:

estimator = TensorFlow(entry_point='ML_models/tensorflow_entry_point.py'
 role=ROLE,
 framework_version='1.12.0',
 training_steps=1000,
 evaluation_steps=100,
 train_instance_count=2,
 train_instance_type='ml.m5.xlarge')
estimator.output_path = f's3://JOB_PATH/model/TRAIN_TABLE_NAME'

validation_prefix = f's3://JOB_PATH/validation/TRAIN_TABLE_NAME'

s3_eval_train = sagemaker.s3_input(
 s3_data=validation_prefix,
 content_type='csv',
 distribution='ShardedByS3Key')
 
input_prefix = f's3://JOB_PATH/train/TRAIN_TABLE_NAME'

s3_input_train = sagemaker.s3_input(
 s3_data=input_prefix,
 content_type='csv',
 distribution='ShardedByS3Key')
 
estimator.fit({'train': s3_input_train, 'validation': s3_eval_train})

Transformation settings:

estimator.transformer(instance_count=10, instance_type=ml.c5.2xlarge,
 strategy='SingleRecord',
 assemble_with='Line',
 max_payload=1,
 max_concurrent_transforms=100)

transformer.output_path = f's3://JOB_PATH/predictions/PREDICTION_TABLE_NAME'

transformer.transform(f's3://JOB_PATH/test/PREDICTION_TABLE_NAME',
 content_type='text/csv',
 split_type='Line')

[laurenyu]

hi @NEIA20, thanks for using SageMaker! Could you provide your entry point code and data (or something similar if your code/data is private) for us to reproduce the error?

[NEIA20]

Hi @laurenyu, thanks for getting back to me

Here's some of our tensorflow entry point code:

import os
import tensorflow as tf

tf.logging.set_verbosity(tf.logging.ERROR)

INPUT_TENSOR_NAME = 'inputs'

# Disable MKL to get a better perfomance for this model.
os.environ['TF_DISABLE_MKL'] = '1'
os.environ['TF_DISABLE_POOL_ALLOCATOR'] = '1'

BASE_PATH = '/opt/ml/input/data/'
TRAIN_PATH = BASE_PATH + 'train'
VALIDATION_PATH = BASE_PATH + 'validation'

def serving_input_fn(params):
 training_dir = '/opt/ml/input/data/train/'
 feature_spec = {INPUT_TENSOR_NAME: tf.FixedLenFeature(dtype=tf.float32, shape=get_shape(training_dir))}
 return tf.estimator.export.build_parsing_serving_input_receiver_fn(feature_spec)()

def eval_input_fn(training_dir, params):
 """Returns input function that would feed the model during evaluation"""
 if os.path.exists(VALIDATION_PATH):
 os.system('cat /opt/ml/input/data/validation/*.csv > /opt/ml/input/data/validation/all_validate.csv')
 return _generate_input_fn(VALIDATION_PATH, 'all_validate.csv')
 else:
 first_file = os.listdir(TRAIN_PATH)[0]
 return _generate_input_fn(TRAIN_PATH, first_file)


def _generate_input_fn(training_dir, training_filename):
 training_set = tf.contrib.learn.datasets.base.load_csv_without_header(
 filename=os.path.join(training_dir, training_filename),
 target_dtype=np.float32,
 features_dtype=np.float32,
 target_column=0
 )

 return tf.estimator.inputs.numpy_input_fn(
 x={INPUT_TENSOR_NAME: np.array(training_set.data)},
 y=np.array(training_set.target),
 num_epochs=8200,
 batch_size=512,
 shuffle=True
 )()

And here's one of our testing files:

testing_data_encoded_mean_aligned_0_0_1.csv.zip

[laurenyu]

@NEIA20 thanks for including all of that! would you also be able to include either the training code or a model artifact? (trying to run this on my end)

[NEIA20]

sure thing :)
Here's the model artifcat:

model.tar.gz

Let me know if you need anything else

[laurenyu]

@NEIA20 thanks! the batch transform job succeeded for me (ran it twice just to be sure).

here's what I ran (should be very similar to what you posted):

import sagemaker
from sagemaker.tensorflow import TensorFlowModel

ROLE = 'role-name' # replaced with dummy string
JOB_PATH = 's3-bucket-and-path' # replaced with dummy string
PREDICTION_TABLE_NAME = 'predict'

model = TensorFlowModel(f's3://{JOB_PATH}/model.tar.gz',
 ROLE,
 'entry.py',
 sagemaker_session=sagemaker.session.Session())

transformer = model.transformer(instance_count=10,
 instance_type='ml.c5.2xlarge',
 strategy='SingleRecord',
 assemble_with='Line',
 max_payload=1,
 max_concurrent_transforms=100)

transformer.output_path = f's3://{JOB_PATH}/predictions/{PREDICTION_TABLE_NAME}'

transformer.transform(f's3://{JOB_PATH}/testing_data_encoded_mean_aligned_0_0_1.csv',
 content_type='text/csv',
 split_type='Line')

transformer.wait()

and I copied your entry point code above into a file called entry.py.

Are you consistently encountering the error?

[NEIA20]

@laurenyu thanks for trying it out. Yes we are consistently getting the error.

I thought I had given you everything relevant but perhaps it's an issue in our output_fn? Here's the rest of our tensorflow_entry_point.py file:

import os
import tensorflow as tf
import pandas as pd
import sys
from google.protobuf.json_format import MessageToJson
import json

tf.logging.set_verbosity(tf.logging.ERROR)

INPUT_TENSOR_NAME = 'inputs'

# Disable MKL to get a better perfomance for this model.
os.environ['TF_DISABLE_MKL'] = '1'
os.environ['TF_DISABLE_POOL_ALLOCATOR'] = '1'

BASE_PATH = '/opt/ml/input/data/'
TRAIN_PATH = BASE_PATH + 'train'
VALIDATION_PATH = BASE_PATH + 'validation'


def get_shape(directory):
 filename0 = os.listdir(directory)[0]
 shape_size = pd.read_csv(directory+filename0, nrows=1).shape[1] - 1
 return shape_size


def estimator_fn(run_config, params):
 training_dir = '/opt/ml/input/data/train/'
 feature_columns = [tf.feature_column.numeric_column(INPUT_TENSOR_NAME, shape=get_shape(training_dir))]
 return tf.estimator.DNNClassifier(feature_columns=feature_columns,
 hidden_units=[380, 180],
 n_classes=2,
 config=run_config)


def serving_input_fn(params):
 training_dir = '/opt/ml/input/data/train/'
 feature_spec = {INPUT_TENSOR_NAME: tf.FixedLenFeature(dtype=tf.float32, shape=get_shape(training_dir))}
 return tf.estimator.export.build_parsing_serving_input_receiver_fn(feature_spec)()


def train_input_fn(training_dir, params):
 """Returns input function that would feed the model during training"""
 for root, dirs, files in os.walk(BASE_PATH):
 print('Current directory ' + root)
 print(files)
 os.system('cat /opt/ml/input/data/train/*.csv > /opt/ml/input/data/train/all_train.csv')
 return _generate_input_fn(TRAIN_PATH, 'all_train.csv')


def eval_input_fn(training_dir, params):
 """Returns input function that would feed the model during evaluation"""
 if os.path.exists(VALIDATION_PATH):
 os.system('cat /opt/ml/input/data/validation/*.csv > /opt/ml/input/data/validation/all_validate.csv')
 return _generate_input_fn(VALIDATION_PATH, 'all_validate.csv')
 else:
 first_file = os.listdir(TRAIN_PATH)[0]
 return _generate_input_fn(TRAIN_PATH, first_file)


def _generate_input_fn(training_dir, training_filename):
 training_set = tf.contrib.learn.datasets.base.load_csv_without_header(
 filename=os.path.join(training_dir, training_filename),
 target_dtype=np.float32,
 features_dtype=np.float32,
 target_column=0)

 return tf.estimator.inputs.numpy_input_fn(
 x={INPUT_TENSOR_NAME: np.array(training_set.data)},
 y=np.array(training_set.target),
 num_epochs=8200,
 batch_size=512,
 shuffle=True)()


def output_fn(prediction_result, accepts):
 as_str = MessageToJson(prediction_result)
 try:
 result = json.loads(as_str)
 classes = result['result']['classifications'][0]['classes']
 score_0 = classes[0].get('score', 0.0)
 score_1 = classes[1].get('score', 0.0)
 formatted = "[{score_0}, {score_1}]".format(score_0=score_0, score_1=score_1)
 except KeyError:
 formatted = "[1.0, 0.0]"
 print >> sys.stderr, 'Error while parsing', str(prediction_result)
 return formatted

[laurenyu]

I created a new batch transform job based on the full entry point code, and it still succeeded for me. I'm going to reach out to the relevant service team to see if they have any insight. thanks for your patience!

[andremoeller]

Hey @NEIA20 ,

It looks like the algorithm isn't responding to some of the requests. Could you try reducing max_concurrent_transforms to 8? Thank you.

[NEIA20]

hi @andremoeller @laurenyu - sorry for the late response.

We had previously tried lowering max_concurrent_transforms to 10 and still got the error. I tried again with 8 just now and the same error is still there unfortunately

[NEIA20]

hi @andremoeller @laurenyu, any updates on what might be the issue?

[andremoeller]

Hey @NEIA20 ,

We're actively looking into this with your most recent Transform Job. It seems like we aren't handling errors in certain cases correctly, but we don't have a fix yet. We will keep this issue updated, and when we know when we expect to have a fix deployed, we will let you know. Thanks!

[NEIA20]

thanks @andremoeller, glad to hear it. If you need any more information from us just let me know

[andremoeller]

Hi @NEIA20 ,

It seems like problem is both that the container isn't handling multiple requests well, and we aren't handling certain types of errors. There's a newer TensorFlow Serving container that you can deploy to with endpoint_type 'tensorflow-serving' which we expect to work better in this case, if your goal is to get predictions from CSV data -- the docs are located here: https://github.com/aws/sagemaker-python-sdk/blob/master/src/sagemaker/tensorflow/deploying_tensorflow_serving.rst

Would using the newer TensorFlow serving container satisfy your use case?

Thank you.

[NEIA20]

hi @andremoeller - the thing is that we're not generating predictions using a SageMaker Endpoint, we're using batch transform instead