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new 54e3332e2a [python] add error handling to abort pending commits and
serialization support for ray sink (#7022)
54e3332e2a is described below
commit 54e3332e2aa1971a0890653e6bf876374aea5716
Author: XiaoHongbo <[email protected]>
AuthorDate: Tue Jan 20 15:37:13 2026 +0800
[python] add error handling to abort pending commits and serialization
support for ray sink (#7022)
---
docs/content/program-api/python-api.md | 16 +-
paimon-python/dev/.rat-excludes | 1 +
.../sample/data/__init__.py} | 3 -
paimon-python/pypaimon/sample/data/data.jsonl | 100 ++++++
.../sample/rest_catalog_ray_sink_sample.py | 153 +++++++++
paimon-python/pypaimon/tests/ray_data_test.py | 2 +-
paimon-python/pypaimon/tests/ray_sink_test.py | 343 +++++++++++++++++++++
paimon-python/pypaimon/write/ray_datasink.py | 214 +++++++++----
paimon-python/pypaimon/write/table_write.py | 31 +-
pom.xml | 1 +
10 files changed, 798 insertions(+), 66 deletions(-)
diff --git a/docs/content/program-api/python-api.md
b/docs/content/program-api/python-api.md
index aa7773e049..606937585c 100644
--- a/docs/content/program-api/python-api.md
+++ b/docs/content/program-api/python-api.md
@@ -181,7 +181,7 @@ write_builder = table.new_batch_write_builder()
table_write = write_builder.new_write()
table_commit = write_builder.new_commit()
-# 2. Write data. Support 3 methods:
+# 2. Write data. Support 4 methods:
# 2.1 Write pandas.DataFrame
dataframe = ...
table_write.write_pandas(dataframe)
@@ -194,7 +194,19 @@ table_write.write_arrow(pa_table)
record_batch = ...
table_write.write_arrow_batch(record_batch)
-# 3. Commit data
+# 2.4 Write Ray Dataset (requires ray to be installed)
+import ray
+ray_dataset = ray.data.read_json("/path/to/data.jsonl")
+table_write.write_ray(ray_dataset, overwrite=False, concurrency=2)
+# Parameters:
+# - dataset: Ray Dataset to write
+# - overwrite: Whether to overwrite existing data (default: False)
+# - concurrency: Optional max number of concurrent Ray tasks
+# - ray_remote_args: Optional kwargs passed to ray.remote() (e.g.,
{"num_cpus": 2})
+# Note: write_ray() handles commit internally through Ray Datasink API.
+# Skip steps 3-4 if using write_ray() - just close the writer.
+
+# 3. Commit data (required for write_pandas/write_arrow/write_arrow_batch only)
commit_messages = table_write.prepare_commit()
table_commit.commit(commit_messages)
diff --git a/paimon-python/dev/.rat-excludes b/paimon-python/dev/.rat-excludes
index 576371afae..421839c0f1 100644
--- a/paimon-python/dev/.rat-excludes
+++ b/paimon-python/dev/.rat-excludes
@@ -18,3 +18,4 @@
.gitignore
rat-results.txt
+.*\.jsonl$
diff --git a/paimon-python/dev/.rat-excludes
b/paimon-python/pypaimon/sample/data/__init__.py
similarity index 97%
copy from paimon-python/dev/.rat-excludes
copy to paimon-python/pypaimon/sample/data/__init__.py
index 576371afae..65b48d4d79 100644
--- a/paimon-python/dev/.rat-excludes
+++ b/paimon-python/pypaimon/sample/data/__init__.py
@@ -15,6 +15,3 @@
# See the License for the specific language governing permissions and
# limitations under the License.
################################################################################
-
-.gitignore
-rat-results.txt
diff --git a/paimon-python/pypaimon/sample/data/data.jsonl
b/paimon-python/pypaimon/sample/data/data.jsonl
new file mode 100644
index 0000000000..f33de19c57
--- /dev/null
+++ b/paimon-python/pypaimon/sample/data/data.jsonl
@@ -0,0 +1,100 @@
+{"id": 1, "name": "Item_1", "category": "B", "value": 12.8, "score": 55,
"timestamp": "2024-01-02T10:00:00Z"}
+{"id": 2, "name": "Item_2", "category": "C", "value": 15.1, "score": 60,
"timestamp": "2024-01-03T10:00:00Z"}
+{"id": 3, "name": "Item_3", "category": "A", "value": 17.4, "score": 65,
"timestamp": "2024-01-04T10:00:00Z"}
+{"id": 4, "name": "Item_4", "category": "B", "value": 19.7, "score": 70,
"timestamp": "2024-01-05T10:00:00Z"}
+{"id": 5, "name": "Item_5", "category": "C", "value": 22.0, "score": 75,
"timestamp": "2024-01-06T10:00:00Z"}
+{"id": 6, "name": "Item_6", "category": "A", "value": 24.299999999999997,
"score": 80, "timestamp": "2024-01-07T10:00:00Z"}
+{"id": 7, "name": "Item_7", "category": "B", "value": 26.599999999999998,
"score": 85, "timestamp": "2024-01-08T10:00:00Z"}
+{"id": 8, "name": "Item_8", "category": "C", "value": 28.9, "score": 90,
"timestamp": "2024-01-09T10:00:00Z"}
+{"id": 9, "name": "Item_9", "category": "A", "value": 31.2, "score": 95,
"timestamp": "2024-01-10T10:00:00Z"}
+{"id": 10, "name": "Item_10", "category": "B", "value": 33.5, "score": 100,
"timestamp": "2024-01-11T10:00:00Z"}
+{"id": 11, "name": "Item_11", "category": "C", "value": 35.8, "score": 105,
"timestamp": "2024-01-12T10:00:00Z"}
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"score": 110, "timestamp": "2024-01-13T10:00:00Z"}
+{"id": 13, "name": "Item_13", "category": "B", "value": 40.4, "score": 115,
"timestamp": "2024-01-14T10:00:00Z"}
+{"id": 14, "name": "Item_14", "category": "C", "value": 42.699999999999996,
"score": 120, "timestamp": "2024-01-15T10:00:00Z"}
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"timestamp": "2024-01-16T10:00:00Z"}
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"timestamp": "2024-01-17T10:00:00Z"}
+{"id": 17, "name": "Item_17", "category": "C", "value": 49.599999999999994,
"score": 135, "timestamp": "2024-01-18T10:00:00Z"}
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"score": 145, "timestamp": "2024-01-20T10:00:00Z"}
+{"id": 20, "name": "Item_20", "category": "C", "value": 56.5, "score": 150,
"timestamp": "2024-01-21T10:00:00Z"}
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"timestamp": "2024-01-22T10:00:00Z"}
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"timestamp": "2024-01-24T10:00:00Z"}
+{"id": 24, "name": "Item_24", "category": "A", "value": 65.69999999999999,
"score": 170, "timestamp": "2024-01-25T10:00:00Z"}
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"score": 215, "timestamp": "2024-01-06T10:00:00Z"}
+{"id": 34, "name": "Item_34", "category": "B", "value": 88.69999999999999,
"score": 220, "timestamp": "2024-01-07T10:00:00Z"}
+{"id": 35, "name": "Item_35", "category": "C", "value": 91.0, "score": 225,
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+{"id": 37, "name": "Item_37", "category": "B", "value": 95.6, "score": 235,
"timestamp": "2024-01-10T10:00:00Z"}
+{"id": 38, "name": "Item_38", "category": "C", "value": 97.89999999999999,
"score": 240, "timestamp": "2024-01-11T10:00:00Z"}
+{"id": 39, "name": "Item_39", "category": "A", "value": 100.19999999999999,
"score": 245, "timestamp": "2024-01-12T10:00:00Z"}
+{"id": 40, "name": "Item_40", "category": "B", "value": 102.5, "score": 250,
"timestamp": "2024-01-13T10:00:00Z"}
+{"id": 41, "name": "Item_41", "category": "C", "value": 104.8, "score": 255,
"timestamp": "2024-01-14T10:00:00Z"}
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"timestamp": "2024-01-15T10:00:00Z"}
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+{"id": 44, "name": "Item_44", "category": "C", "value": 111.69999999999999,
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"timestamp": "2024-01-25T10:00:00Z"}
+{"id": 53, "name": "Item_53", "category": "C", "value": 132.39999999999998,
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+{"id": 54, "name": "Item_54", "category": "A", "value": 134.7, "score": 320,
"timestamp": "2024-01-27T10:00:00Z"}
+{"id": 55, "name": "Item_55", "category": "B", "value": 137.0, "score": 325,
"timestamp": "2024-01-28T10:00:00Z"}
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"timestamp": "2024-01-04T10:00:00Z"}
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+{"id": 91, "name": "Item_91", "category": "B", "value": 219.79999999999998,
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+{"id": 92, "name": "Item_92", "category": "C", "value": 222.1, "score": 510,
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+{"id": 94, "name": "Item_94", "category": "B", "value": 226.7, "score": 520,
"timestamp": "2024-01-11T10:00:00Z"}
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+{"id": 96, "name": "Item_96", "category": "A", "value": 231.29999999999998,
"score": 530, "timestamp": "2024-01-13T10:00:00Z"}
+{"id": 97, "name": "Item_97", "category": "B", "value": 233.6, "score": 535,
"timestamp": "2024-01-14T10:00:00Z"}
+{"id": 98, "name": "Item_98", "category": "C", "value": 235.89999999999998,
"score": 540, "timestamp": "2024-01-15T10:00:00Z"}
+{"id": 99, "name": "Item_99", "category": "A", "value": 238.2, "score": 545,
"timestamp": "2024-01-16T10:00:00Z"}
+{"id": 100, "name": "Item_100", "category": "B", "value": 240.49999999999997,
"score": 550, "timestamp": "2024-01-17T10:00:00Z"}
diff --git a/paimon-python/pypaimon/sample/rest_catalog_ray_sink_sample.py
b/paimon-python/pypaimon/sample/rest_catalog_ray_sink_sample.py
new file mode 100644
index 0000000000..83264854d7
--- /dev/null
+++ b/paimon-python/pypaimon/sample/rest_catalog_ray_sink_sample.py
@@ -0,0 +1,153 @@
+################################################################################
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+"""
+Example: REST Catalog + Ray Sink with Local File + Mock Server
+
+Demonstrates reading JSON data from local file using Ray Data and writing to
Paimon table
+using Ray Sink (write_ray) with a mock REST catalog server.
+"""
+
+import os
+import tempfile
+import uuid
+
+import pyarrow as pa
+import ray
+
+from pypaimon import CatalogFactory, Schema
+from pypaimon.common.options.core_options import CoreOptions
+from pypaimon.schema.data_types import PyarrowFieldParser
+from pypaimon.tests.rest.rest_server import RESTCatalogServer
+from pypaimon.api.api_response import ConfigResponse
+from pypaimon.api.auth import BearTokenAuthProvider
+
+
+def _get_sample_data_path(filename: str) -> str:
+ sample_dir = os.path.dirname(os.path.abspath(__file__))
+ return os.path.join(sample_dir, 'data', filename)
+
+
+def main():
+ ray.init(ignore_reinit_error=True, num_cpus=2)
+
+ temp_dir = tempfile.mkdtemp()
+ token = str(uuid.uuid4())
+ server = RESTCatalogServer(
+ data_path=temp_dir,
+ auth_provider=BearTokenAuthProvider(token),
+ config=ConfigResponse(defaults={"prefix": "mock-test"}),
+ warehouse="warehouse"
+ )
+ server.start()
+ print(f"REST server started at: {server.get_url()}")
+
+ json_file_path = _get_sample_data_path('data.jsonl')
+
+ table_write = None
+ try:
+ catalog = CatalogFactory.create({
+ 'metastore': 'rest',
+ 'uri': f"http://localhost:{server.port}";,
+ 'warehouse': "warehouse",
+ 'token.provider': 'bear',
+ 'token': token,
+ })
+ catalog.create_database("default", ignore_if_exists=True)
+
+ schema = Schema.from_pyarrow_schema(pa.schema([
+ ('id', pa.int64()),
+ ('name', pa.string()),
+ ('category', pa.string()),
+ ('value', pa.float64()),
+ ('score', pa.int64()),
+ ('timestamp', pa.timestamp('s')),
+ ]), primary_keys=['id'], options={
+ CoreOptions.BUCKET.key(): '4'
+ })
+
+ table_name = 'default.oss_json_import_table'
+ catalog.create_table(table_name, schema, ignore_if_exists=True)
+ table = catalog.get_table(table_name)
+
+ print(f"Reading JSON from local file: {json_file_path}")
+ ray_dataset = ray.data.read_json(
+ json_file_path,
+ concurrency=2,
+ )
+
+ print(f"Ray Dataset: {ray_dataset.count()} rows")
+ print(f"Schema: {ray_dataset.schema()}")
+
+ table_pa_schema =
PyarrowFieldParser.from_paimon_schema(table.table_schema.fields)
+
+ def cast_batch_to_table_schema(batch: pa.RecordBatch) -> pa.Table:
+ arrays = []
+ for field in table_pa_schema:
+ col_name = field.name
+ col_array = batch.column(col_name)
+ if isinstance(col_array, pa.ChunkedArray):
+ col_array = col_array.combine_chunks()
+ if col_array.type != field.type:
+ col_array = col_array.cast(field.type)
+ arrays.append(col_array)
+ record_batch = pa.RecordBatch.from_arrays(arrays,
schema=table_pa_schema)
+ return pa.Table.from_batches([record_batch])
+
+ ray_dataset = ray_dataset.map_batches(
+ cast_batch_to_table_schema,
+ batch_format="pyarrow",
+ )
+
+ write_builder = table.new_batch_write_builder()
+ table_write = write_builder.new_write()
+
+ table_write.write_ray(
+ ray_dataset,
+ overwrite=False,
+ concurrency=2,
+ ray_remote_args={"num_cpus": 1}
+ )
+
+ # write_ray() has already committed the data, just close the writer
+ table_write.close()
+ table_write = None
+
+ print(f"Successfully wrote {ray_dataset.count()} rows to table")
+
+ read_builder = table.new_read_builder()
+ table_read = read_builder.new_read()
+ table_scan = read_builder.new_scan()
+ splits = table_scan.plan().splits()
+
+ result_df = table_read.to_pandas(splits)
+ print(f"Read back {len(result_df)} rows from table")
+ print(result_df.head())
+
+ finally:
+ if table_write is not None:
+ try:
+ table_write.close()
+ except Exception:
+ pass
+ server.shutdown()
+ if ray.is_initialized():
+ ray.shutdown()
+
+
+if __name__ == '__main__':
+ main()
diff --git a/paimon-python/pypaimon/tests/ray_data_test.py
b/paimon-python/pypaimon/tests/ray_data_test.py
index e931a4c7dc..00995d6976 100644
--- a/paimon-python/pypaimon/tests/ray_data_test.py
+++ b/paimon-python/pypaimon/tests/ray_data_test.py
@@ -155,7 +155,7 @@ class RayDataTest(unittest.TestCase):
ds = from_arrow(test_data)
write_builder = table.new_batch_write_builder()
writer = write_builder.new_write()
- writer.write_raydata(ds, parallelism=2)
+ writer.write_ray(ds, concurrency=2)
# Read using Ray Data
read_builder = table.new_read_builder()
table_read = read_builder.new_read()
diff --git a/paimon-python/pypaimon/tests/ray_sink_test.py
b/paimon-python/pypaimon/tests/ray_sink_test.py
new file mode 100644
index 0000000000..bc1ff3ef9f
--- /dev/null
+++ b/paimon-python/pypaimon/tests/ray_sink_test.py
@@ -0,0 +1,343 @@
+################################################################################
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+################################################################################
+
+import os
+import tempfile
+import unittest
+from unittest.mock import Mock, patch
+
+import pyarrow as pa
+from ray.data._internal.execution.interfaces import TaskContext
+
+from pypaimon import CatalogFactory, Schema
+from pypaimon.write.ray_datasink import PaimonDatasink
+from pypaimon.write.commit_message import CommitMessage
+
+
+class RaySinkTest(unittest.TestCase):
+ def setUp(self):
+ self.temp_dir = tempfile.mkdtemp()
+ self.warehouse_path = os.path.join(self.temp_dir, "warehouse")
+ os.makedirs(self.warehouse_path, exist_ok=True)
+
+ catalog_options = {
+ "warehouse": self.warehouse_path
+ }
+ self.catalog = CatalogFactory.create(catalog_options)
+ self.catalog.create_database("test_db", ignore_if_exists=True)
+
+ pa_schema = pa.schema([
+ ('id', pa.int64()),
+ ('name', pa.string()),
+ ('value', pa.float64())
+ ])
+
+ schema = Schema.from_pyarrow_schema(
+ pa_schema=pa_schema,
+ partition_keys=None,
+ primary_keys=['id'],
+ options={'bucket': '2'}, # Use fixed bucket mode for testing
+ comment='test table'
+ )
+
+ self.table_identifier = "test_db.test_table"
+ self.catalog.create_table(self.table_identifier, schema,
ignore_if_exists=False)
+ self.table = self.catalog.get_table(self.table_identifier)
+
+ def tearDown(self):
+ import shutil
+ if os.path.exists(self.temp_dir):
+ shutil.rmtree(self.temp_dir)
+
+ def test_init_and_serialization(self):
+ """Test initialization, serialization, and table name."""
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ self.assertEqual(datasink.table, self.table)
+ self.assertFalse(datasink.overwrite)
+ self.assertIsNone(datasink._writer_builder)
+ self.assertEqual(datasink._table_name, "test_db.test_table")
+
+ datasink_overwrite = PaimonDatasink(self.table, overwrite=True)
+ self.assertTrue(datasink_overwrite.overwrite)
+
+ # Test serialization
+ datasink._writer_builder = Mock()
+ state = datasink.__getstate__()
+ self.assertIn('table', state)
+ self.assertIn('overwrite', state)
+ self.assertIn('_writer_builder', state)
+
+ new_datasink = PaimonDatasink.__new__(PaimonDatasink)
+ new_datasink.__setstate__(state)
+ self.assertEqual(new_datasink.table, self.table)
+ self.assertFalse(new_datasink.overwrite)
+
+ def test_table_and_writer_builder_serializable(self):
+ import pickle
+ try:
+ pickled_table = pickle.dumps(self.table)
+ unpickled_table = pickle.loads(pickled_table)
+ self.assertIsNotNone(unpickled_table)
+ builder = unpickled_table.new_batch_write_builder()
+ self.assertIsNotNone(builder)
+ except Exception as e:
+ self.fail(f"Table object is not serializable: {e}")
+
+ writer_builder = self.table.new_batch_write_builder()
+ try:
+ pickled_builder = pickle.dumps(writer_builder)
+ unpickled_builder = pickle.loads(pickled_builder)
+ self.assertIsNotNone(unpickled_builder)
+ table_write = unpickled_builder.new_write()
+ self.assertIsNotNone(table_write)
+ table_write.close()
+ except Exception as e:
+ self.fail(f"WriterBuilder is not serializable: {e}")
+
+ overwrite_builder = self.table.new_batch_write_builder().overwrite()
+ try:
+ pickled_overwrite = pickle.dumps(overwrite_builder)
+ unpickled_overwrite = pickle.loads(pickled_overwrite)
+ self.assertIsNotNone(unpickled_overwrite)
+ # static_partition is a dict, empty dict {} means overwrite all
partitions
+ self.assertIsNotNone(unpickled_overwrite.static_partition)
+ self.assertIsInstance(unpickled_overwrite.static_partition, dict)
+ except Exception as e:
+ self.fail(f"Overwrite WriterBuilder is not serializable: {e}")
+
+ def test_on_write_start(self):
+ """Test on_write_start with normal and overwrite modes."""
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ self.assertIsNotNone(datasink._writer_builder)
+ self.assertFalse(datasink._writer_builder.static_partition)
+
+ datasink_overwrite = PaimonDatasink(self.table, overwrite=True)
+ datasink_overwrite.on_write_start()
+
self.assertIsNotNone(datasink_overwrite._writer_builder.static_partition)
+
+ def test_write(self):
+ """Test write method: empty blocks, multiple blocks, error handling,
and resource cleanup."""
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ ctx = Mock(spec=TaskContext)
+
+ # Test empty block
+ empty_table = pa.table({
+ 'id': pa.array([], type=pa.int64()),
+ 'name': pa.array([], type=pa.string()),
+ 'value': pa.array([], type=pa.float64())
+ })
+ result = datasink.write([empty_table], ctx)
+ self.assertEqual(result, [])
+
+ # Test single and multiple blocks
+ single_block = pa.table({
+ 'id': [1, 2, 3],
+ 'name': ['Alice', 'Bob', 'Charlie'],
+ 'value': [1.1, 2.2, 3.3]
+ })
+ result = datasink.write([single_block], ctx)
+ self.assertIsInstance(result, list)
+ if result:
+ self.assertTrue(all(isinstance(msg, CommitMessage) for msg in
result))
+
+ block1 = pa.table({
+ 'id': [4, 5],
+ 'name': ['David', 'Eve'],
+ 'value': [4.4, 5.5]
+ })
+ block2 = pa.table({
+ 'id': [6, 7],
+ 'name': ['Frank', 'Grace'],
+ 'value': [6.6, 7.7]
+ })
+ result = datasink.write([block1, block2], ctx)
+ self.assertIsInstance(result, list)
+ if result:
+ self.assertTrue(all(isinstance(msg, CommitMessage) for msg in
result))
+
+ # Test that write creates WriteBuilder on worker (not using driver's
builder)
+ with patch.object(self.table, 'new_batch_write_builder') as
mock_builder:
+ mock_write_builder = Mock()
+ mock_write_builder.overwrite.return_value = mock_write_builder
+ mock_write = Mock()
+ mock_write.prepare_commit.return_value = []
+ mock_write_builder.new_write.return_value = mock_write
+ mock_builder.return_value = mock_write_builder
+
+ data_table = pa.table({
+ 'id': [1],
+ 'name': ['Alice'],
+ 'value': [1.1]
+ })
+ datasink.write([data_table], ctx)
+ mock_builder.assert_called_once()
+
+ invalid_table = pa.table({
+ 'wrong_column': [1, 2, 3]
+ })
+ with self.assertRaises(Exception):
+ datasink.write([invalid_table], ctx)
+
+ with patch.object(self.table, 'new_batch_write_builder') as
mock_builder:
+ mock_write_builder = Mock()
+ mock_write_builder.overwrite.return_value = mock_write_builder
+ mock_write = Mock()
+ mock_write.write_arrow.side_effect = Exception("Write error")
+ mock_write_builder.new_write.return_value = mock_write
+ mock_builder.return_value = mock_write_builder
+
+ data_table = pa.table({
+ 'id': [1],
+ 'name': ['Alice'],
+ 'value': [1.1]
+ })
+ with self.assertRaises(Exception):
+ datasink.write([data_table], ctx)
+ mock_write.close.assert_called_once()
+
+ def test_on_write_complete(self):
+ from ray.data.datasource.datasink import WriteResult
+
+ # Test empty messages
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ write_result = WriteResult(
+ num_rows=0,
+ size_bytes=0,
+ write_returns=[[], []]
+ )
+ datasink.on_write_complete(write_result)
+
+ # Test with messages and filtering empty messages
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ commit_msg1 = Mock(spec=CommitMessage)
+ commit_msg1.is_empty.return_value = False
+ commit_msg2 = Mock(spec=CommitMessage)
+ commit_msg2.is_empty.return_value = False
+ empty_msg = Mock(spec=CommitMessage)
+ empty_msg.is_empty.return_value = True
+
+ write_result = WriteResult(
+ num_rows=0,
+ size_bytes=0,
+ write_returns=[[commit_msg1], [commit_msg2], [empty_msg]]
+ )
+
+ mock_commit = Mock()
+ datasink._writer_builder.new_commit = Mock(return_value=mock_commit)
+ datasink.on_write_complete(write_result)
+
+ mock_commit.commit.assert_called_once()
+ commit_args = mock_commit.commit.call_args[0][0]
+ self.assertEqual(len(commit_args), 2) # Empty message filtered out
+ mock_commit.close.assert_called_once()
+
+ # Test commit failure: abort should be called
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ commit_msg1 = Mock(spec=CommitMessage)
+ commit_msg1.is_empty.return_value = False
+ commit_msg2 = Mock(spec=CommitMessage)
+ commit_msg2.is_empty.return_value = False
+
+ write_result = WriteResult(
+ num_rows=0,
+ size_bytes=0,
+ write_returns=[[commit_msg1], [commit_msg2]]
+ )
+
+ mock_commit = Mock()
+ mock_commit.commit.side_effect = Exception("Commit failed")
+ datasink._writer_builder.new_commit = Mock(return_value=mock_commit)
+
+ with self.assertRaises(Exception):
+ datasink.on_write_complete(write_result)
+
+ mock_commit.abort.assert_called_once()
+ abort_args = mock_commit.abort.call_args[0][0]
+ self.assertEqual(len(abort_args), 2)
+ mock_commit.close.assert_called_once()
+
+ # Test table_commit creation failure
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ commit_msg1 = Mock(spec=CommitMessage)
+ commit_msg1.is_empty.return_value = False
+
+ write_result = WriteResult(
+ num_rows=0,
+ size_bytes=0,
+ write_returns=[[commit_msg1]]
+ )
+
+ mock_new_commit = Mock(side_effect=Exception("Failed to create
table_commit"))
+ datasink._writer_builder.new_commit = mock_new_commit
+ with self.assertRaises(Exception):
+ datasink.on_write_complete(write_result)
+ self.assertEqual(len(datasink._pending_commit_messages), 1)
+
+ def test_on_write_failed(self):
+ # Test without pending messages (on_write_complete() never called)
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ self.assertEqual(datasink._pending_commit_messages, [])
+ error = Exception("Write job failed")
+ datasink.on_write_failed(error) # Should not raise exception
+
+ # Test with pending messages (on_write_complete() was called but
failed)
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ commit_msg1 = Mock(spec=CommitMessage)
+ commit_msg2 = Mock(spec=CommitMessage)
+ datasink._pending_commit_messages = [commit_msg1, commit_msg2]
+
+ mock_commit = Mock()
+ datasink._writer_builder.new_commit = Mock(return_value=mock_commit)
+ error = Exception("Write job failed")
+ datasink.on_write_failed(error)
+
+ mock_commit.abort.assert_called_once()
+ abort_args = mock_commit.abort.call_args[0][0]
+ self.assertEqual(len(abort_args), 2)
+ self.assertEqual(abort_args[0], commit_msg1)
+ self.assertEqual(abort_args[1], commit_msg2)
+ mock_commit.close.assert_called_once()
+ self.assertEqual(datasink._pending_commit_messages, [])
+
+ # Test abort failure handling (should not raise exception)
+ datasink = PaimonDatasink(self.table, overwrite=False)
+ datasink.on_write_start()
+ commit_msg1 = Mock(spec=CommitMessage)
+ datasink._pending_commit_messages = [commit_msg1]
+
+ mock_commit = Mock()
+ mock_commit.abort.side_effect = Exception("Abort failed")
+ datasink._writer_builder.new_commit = Mock(return_value=mock_commit)
+ error = Exception("Write job failed")
+ datasink.on_write_failed(error)
+
+ mock_commit.abort.assert_called_once()
+ mock_commit.close.assert_called_once()
+ self.assertEqual(datasink._pending_commit_messages, [])
+
+
+if __name__ == '__main__':
+ unittest.main()
diff --git a/paimon-python/pypaimon/write/ray_datasink.py
b/paimon-python/pypaimon/write/ray_datasink.py
index 709a010fa4..5c809825a7 100644
--- a/paimon-python/pypaimon/write/ray_datasink.py
+++ b/paimon-python/pypaimon/write/ray_datasink.py
@@ -1,3 +1,4 @@
+################################################################################
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
@@ -15,77 +16,176 @@
# limitations under the License.
################################################################################
"""
-Module to reawrited a Paimon table from a Ray Dataset, by using the Ray
Datasink API.
+Module to write a Paimon table from a Ray Dataset, by using the Ray Datasink
API.
"""
-from typing import Iterable
-from ray.data.datasource.datasink import Datasink, WriteResult, WriteReturnType
-from pypaimon.table.table import Table
-from pypaimon.write.write_builder import WriteBuilder
-from ray.data.block import BlockAccessor
-from ray.data.block import Block
+import logging
+from typing import TYPE_CHECKING, Iterable, List, Optional
+
+from ray.data.datasource.datasink import Datasink, WriteResult
+from ray.util.annotations import DeveloperAPI
+from ray.data.block import BlockAccessor, Block
from ray.data._internal.execution.interfaces import TaskContext
import pyarrow as pa
+if TYPE_CHECKING:
+ from pypaimon.table.table import Table
+ from pypaimon.write.write_builder import WriteBuilder
+ from pypaimon.write.commit_message import CommitMessage
+
+logger = logging.getLogger(__name__)
-class PaimonDatasink(Datasink):
-
- def __init__(self, table: Table, overwrite=False):
+
+@DeveloperAPI
+class PaimonDatasink(Datasink[List["CommitMessage"]]):
+ def __init__(
+ self,
+ table: "Table",
+ overwrite: bool = False,
+ ):
self.table = table
self.overwrite = overwrite
+ self._table_name = table.identifier.get_full_name()
+ self._writer_builder: Optional["WriteBuilder"] = None
+ self._pending_commit_messages: List["CommitMessage"] = []
- def on_write_start(self, schema=None) -> None:
- """Callback for when a write job starts.
+ def __getstate__(self) -> dict:
+ state = self.__dict__.copy()
+ return state
- Use this method to perform setup for write tasks. For example,
creating a
- staging bucket in S3.
+ def __setstate__(self, state: dict) -> None:
+ self.__dict__.update(state)
+ writer_builder = getattr(self, '_writer_builder', None)
+ if writer_builder is not None and not hasattr(writer_builder, 'table'):
+ self._writer_builder = None
+ if not hasattr(self, '_table_name'):
+ self._table_name = self.table.identifier.get_full_name()
- Args:
- schema: Optional schema information passed by Ray Data.
- """
- self.writer_builder: WriteBuilder =
self.table.new_batch_write_builder()
+ def on_write_start(self, schema=None) -> None:
+ logger.info(f"Starting write job for table {self._table_name}")
+
+ self._writer_builder = self.table.new_batch_write_builder()
if self.overwrite:
- self.writer_builder = self.writer_builder.overwrite()
+ self._writer_builder = self._writer_builder.overwrite()
def write(
self,
blocks: Iterable[Block],
ctx: TaskContext,
- ) -> WriteReturnType:
- """Write blocks. This is used by a single write task.
-
- Args:
- blocks: Generator of data blocks.
- ctx: ``TaskContext`` for the write task.
-
- Returns:
- Result of this write task. When the entire write operator finishes,
- All returned values will be passed as `WriteResult.write_returns`
- to `Datasink.on_write_complete`.
- """
- table_write = self.writer_builder.new_write()
- for block in blocks:
- block_arrow: pa.Table = BlockAccessor.for_block(block).to_arrow()
- table_write.write_arrow(block_arrow)
- commit_messages = table_write.prepare_commit()
- table_write.close()
- return commit_messages
-
- def on_write_complete(self, write_result: WriteResult[WriteReturnType]):
- """Callback for when a write job completes.
-
- This can be used to `commit` a write output. This method must
- succeed prior to ``write_datasink()`` returning to the user. If this
- method fails, then ``on_write_failed()`` is called.
-
- Args:
- write_result: Aggregated result of the
- Write operator, containing write results and stats.
- """
- table_commit = self.writer_builder.new_commit()
- table_commit.commit([
- commit_message
- for commit_messages in write_result.write_returns
- for commit_message in commit_messages
- ])
- table_commit.close()
+ ) -> List["CommitMessage"]:
+ commit_messages_list: List["CommitMessage"] = []
+ table_write = None
+
+ try:
+ writer_builder = self.table.new_batch_write_builder()
+ if self.overwrite:
+ writer_builder = writer_builder.overwrite()
+
+ table_write = writer_builder.new_write()
+
+ for block in blocks:
+ block_arrow: pa.Table =
BlockAccessor.for_block(block).to_arrow()
+
+ if block_arrow.num_rows == 0:
+ continue
+
+ table_write.write_arrow(block_arrow)
+
+ commit_messages = table_write.prepare_commit()
+ commit_messages_list.extend(commit_messages)
+ finally:
+ if table_write is not None:
+ table_write.close()
+
+ return commit_messages_list
+
+ def on_write_complete(
+ self, write_result: WriteResult[List["CommitMessage"]]
+ ):
+ table_commit = None
+ commit_messages_to_abort = []
+ try:
+ all_commit_messages = [
+ commit_message
+ for commit_messages in write_result.write_returns
+ for commit_message in commit_messages
+ ]
+
+ non_empty_messages = [
+ msg for msg in all_commit_messages if not msg.is_empty()
+ ]
+
+ self._pending_commit_messages = non_empty_messages
+
+ if not non_empty_messages:
+ logger.info("No data to commit (all commit messages are
empty)")
+ self._pending_commit_messages = []
+ return
+
+ logger.info(
+ f"Committing {len(non_empty_messages)} commit messages "
+ f"for table {self._table_name}"
+ )
+
+ table_commit = self._writer_builder.new_commit()
+ commit_messages_to_abort = non_empty_messages
+ table_commit.commit(non_empty_messages)
+
+ commit_messages_to_abort = []
+ self._pending_commit_messages = []
+
+ logger.info(f"Successfully committed write job for table
{self._table_name}")
+ except Exception as e:
+ logger.error(
+ f"Error committing write job for table {self._table_name}:
{e}",
+ exc_info=e
+ )
+ if table_commit is not None and commit_messages_to_abort:
+ try:
+ table_commit.abort(commit_messages_to_abort)
+ logger.info(
+ f"Aborted {len(commit_messages_to_abort)} commit
messages "
+ f"for table {self._table_name}"
+ )
+ except Exception as abort_error:
+ logger.error(
+ f"Error aborting commit messages: {abort_error}",
+ exc_info=abort_error
+ )
+ finally:
+ self._pending_commit_messages = []
+ raise
+ finally:
+ if table_commit is not None:
+ try:
+ table_commit.close()
+ except Exception as e:
+ logger.warning(
+ f"Error closing table_commit: {e}",
+ exc_info=e
+ )
+
+ def on_write_failed(self, error: Exception) -> None:
+ logger.error(
+ f"Write job failed for table {self._table_name}. Error: {error}",
+ exc_info=error
+ )
+
+ if self._pending_commit_messages:
+ try:
+ table_commit = self._writer_builder.new_commit()
+ try:
+ table_commit.abort(self._pending_commit_messages)
+ logger.info(
+ f"Aborted {len(self._pending_commit_messages)} commit
messages "
+ f"for table {self._table_name} in on_write_failed()"
+ )
+ finally:
+ table_commit.close()
+ except Exception as abort_error:
+ logger.error(
+ f"Error aborting commit messages in on_write_failed():
{abort_error}",
+ exc_info=abort_error
+ )
+ finally:
+ self._pending_commit_messages = []
diff --git a/paimon-python/pypaimon/write/table_write.py
b/paimon-python/pypaimon/write/table_write.py
index 9a4bdecf26..a2c9a9a4c3 100644
--- a/paimon-python/pypaimon/write/table_write.py
+++ b/paimon-python/pypaimon/write/table_write.py
@@ -16,7 +16,7 @@
# limitations under the License.
################################################################################
from collections import defaultdict
-from typing import List
+from typing import TYPE_CHECKING, Any, Dict, List, Optional
import pyarrow as pa
@@ -25,6 +25,9 @@ from pypaimon.snapshot.snapshot import BATCH_COMMIT_IDENTIFIER
from pypaimon.write.commit_message import CommitMessage
from pypaimon.write.file_store_write import FileStoreWrite
+if TYPE_CHECKING:
+ from ray.data import Dataset
+
class TableWrite:
def __init__(self, table, commit_user):
@@ -68,10 +71,32 @@ class TableWrite:
self.file_store_write.write_cols = write_cols
return self
- def write_raydata(self, dataset, overwrite=False, parallelism=1):
+ def write_ray(
+ self,
+ dataset: "Dataset",
+ overwrite: bool = False,
+ concurrency: Optional[int] = None,
+ ray_remote_args: Optional[Dict[str, Any]] = None,
+ ) -> None:
+ """
+ Write a Ray Dataset to Paimon table.
+
+ Args:
+ dataset: Ray Dataset to write. This is a distributed data
collection
+ from Ray Data (ray.data.Dataset).
+ overwrite: Whether to overwrite existing data. Defaults to False.
+ concurrency: Optional max number of Ray tasks to run concurrently.
+ By default, dynamically decided based on available resources.
+ ray_remote_args: Optional kwargs passed to :func:`ray.remote` in
write tasks.
+ For example, ``{"num_cpus": 2, "max_retries": 3}``.
+ """
from pypaimon.write.ray_datasink import PaimonDatasink
datasink = PaimonDatasink(self.table, overwrite=overwrite)
- dataset.write_datasink(datasink, concurrency=parallelism)
+ dataset.write_datasink(
+ datasink,
+ concurrency=concurrency,
+ ray_remote_args=ray_remote_args,
+ )
def close(self):
self.file_store_write.close()
diff --git a/pom.xml b/pom.xml
index f035f79c22..c9025eee8c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -637,6 +637,7 @@ under the License.
<exclude>paimon-common/src/main/antlr4/**</exclude>
<exclude>paimon-core/src/test/resources/compatibility/**</exclude>
<exclude>paimon-faiss/paimon-faiss-jni/build/**</exclude>
+
<exclude>paimon-python/pypaimon/sample/data/**</exclude>
</excludes>
</configuration>
</plugin>
