SynapseML version

1.07

System information

• Language version (e.g. python 3.8, scala 2.12):3.8
• Spark Version (e.g. 3.2.3):3.3.2
• Spark Platform (e.g. Synapse, Databricks):

Describe the problem

I am training a classifier, and the JVM always crashes when spark.executor.instances > 1, but it works fine when spark.executor.instances = 1. Can anyone help me with this issue?

Code to reproduce issue

for col in vecCols:
train = train.withColumn(col, train[col].cast(DoubleType()))
train = train.withColumn(labelCol, train[labelCol].cast(IntegerType()))
assembler = VectorAssembler(inputCols=vecCols, outputCol="features", handleInvalid="keep")
pipeline = Pipeline(stages=[assembler])
train = pipeline.fit(train).transform(train)

classifier = LightGBMClassifier(featuresCol="features", categoricalSlotNames=cateCols, featuresShapCol="importances", labelCol=labelCol, verbosity=10,executionMode='streaming', useSingleDatasetMode=True)

Other info / logs

24/10/15 14:26:29 INFO InternalParquetRecordReader: RecordReader initialized will read a total of 2146 records.
24/10/15 14:26:29 INFO InternalParquetRecordReader: at row 0. reading next block
24/10/15 14:26:29 INFO InternalParquetRecordReader: block read in memory in 2 ms. row count = 2146
24/10/15 14:26:30 INFO StreamingPartitionTask: done with data preparation on partition 1, task 29
24/10/15 14:26:30 INFO StreamingPartitionTask: Helper task 29, partition 1 finished processing rows
24/10/15 14:26:30 INFO StreamingPartitionTask: Beginning cleanup for partition 1, task 29
24/10/15 14:26:30 INFO StreamingPartitionTask: Done with cleanup for partition 1, task 29
24/10/15 14:26:30 INFO StreamingPartitionTask: Getting final training Dataset for partition 5.
24/10/15 14:26:30 INFO Executor: Finished task 1.0 in stage 8.0 (TID 29). 1789 bytes result sent to driver
24/10/15 14:26:30 INFO StreamingPartitionTask: Creating LightGBM Booster for partition 5, task 33
24/10/15 14:26:30 INFO StreamingPartitionTask: Beginning training on LightGBM Booster for task 33, partition 5
24/10/15 14:26:30 INFO StreamingPartitionTask: LightGBM task starting iteration 0
[LightGBM] [Info] Number of positive: 61700, number of negative: 1063514
[LightGBM] [Debug] Dataset::GetMultiBinFromSparseFeatures: sparse rate 0.844580
[LightGBM] [Debug] Dataset::GetMultiBinFromAllFeatures: sparse rate 0.479102
[LightGBM] [Debug] init for col-wise cost 0.115891 seconds, init for row-wise cost 0.390814 seconds
[LightGBM] [Warning] Auto-choosing row-wise multi-threading, the overhead of testing was 0.161628 seconds.
You can set force_row_wise=true to remove the overhead.
And if memory is not enough, you can set force_col_wise=true.
[LightGBM] [Debug] Using Sparse Multi-Val Bin
[LightGBM] [Info] Total Bins 10088
[LightGBM] [Info] Number of data points in the train set: 580970, number of used features: 83
[LightGBM] [Info] [binary:BoostFromScore]: pavg=0.054834 -> initscore=-2.847050
[LightGBM] [Info] Start training from score -2.847050

A fatal error has been detected by the Java Runtime Environment:

SIGSEGV (0xb) at pc=0x00007fd300c484db, pid=3104731, tid=0x00007fd30bc28700

JRE version: Java(TM) SE Runtime Environment (8.0_181-b13) (build 1.8.0_181-b13)

Java VM: Java HotSpot(TM) 64-Bit Server VM (25.181-b13 mixed mode linux-amd64 )

Problematic frame:

C [lib_lightgbm.so+0x3a54db] LightGBM::SerialTreeLearner::SplitInner(LightGBM::Tree*, int, int*, int*, bool)+0xf7b

Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

An error report file with more information is saved as:

/data/disk03/hadoop/yarn/local/usercache/appcache/application_1715260252878_48344/container_e25_1715260252878_48344_02_000003/hs_err_pid3104731.log

If you would like to submit a bug report, please visit:

http://bugreport.java.com/bugreport/crash.jsp

The crash happened outside the Java Virtual Machine in native code.

See problematic frame for where to report the bug.

What component(s) does this bug affect?

• area/cognitive: Cognitive project
• area/core: Core project
• area/deep-learning: DeepLearning project
• area/lightgbm: Lightgbm project
• area/opencv: Opencv project
• area/vw: VW project
• area/website: Website
• area/build: Project build system
• area/notebooks: Samples under notebooks folder
• area/docker: Docker usage
• area/models: models related issue

What language(s) does this bug affect?

• language/scala: Scala source code
• language/python: Pyspark APIs
• language/r: R APIs
• language/csharp: .NET APIs
• language/new: Proposals for new client languages

What integration(s) does this bug affect?

• integrations/synapse: Azure Synapse integrations
• integrations/azureml: Azure ML integrations
• integrations/databricks: Databricks integrations