sshivampeta commented on code in PR #16289: URL: https://github.com/apache/iceberg/pull/16289#discussion_r3278352010
########## core/src/test/java/org/apache/iceberg/TestReplaceTableSafety.java: ########## @@ -0,0 +1,198 @@ +/* + * 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. + */ +package org.apache.iceberg; + +import static org.apache.iceberg.types.Types.NestedField.required; +import static org.assertj.core.api.Assertions.assertThat; +import static org.assertj.core.api.Assertions.assertThatThrownBy; + +import java.nio.file.Path; +import org.apache.iceberg.catalog.Namespace; +import org.apache.iceberg.catalog.TableIdentifier; +import org.apache.iceberg.inmemory.InMemoryCatalog; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap; +import org.apache.iceberg.types.Types; +import org.apache.iceberg.types.Types.NestedField; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.io.TempDir; + +/** + * Regression tests for GH-16232. + * + * <p>Replace transactions must fail on concurrent table metadata changes rather than silently + * overwriting committed updates. + */ +public class TestReplaceTableSafety { + + private static final Namespace NS = Namespace.of("db"); + private static final TableIdentifier TABLE = TableIdentifier.of(NS, "tbl"); + + private static final Schema SCHEMA = + new Schema( + required(1, "id", Types.IntegerType.get()), required(2, "data", Types.StringType.get())); + + private static final Schema SCHEMA_WITH_EXTRA_COL = + new Schema( + required(1, "id", Types.IntegerType.get()), + required(2, "data", Types.StringType.get()), + NestedField.optional(3, "extra", Types.StringType.get())); + + private static final DataFile FILE_A = + DataFiles.builder(PartitionSpec.unpartitioned()) + .withPath("/path/to/data-a.parquet") + .withFileSizeInBytes(10) + .withRecordCount(2) + .build(); + + private static final DataFile FILE_B = + DataFiles.builder(PartitionSpec.unpartitioned()) + .withPath("/path/to/data-b.parquet") + .withFileSizeInBytes(10) + .withRecordCount(2) + .build(); + + private InMemoryCatalog catalog; + + @BeforeEach + public void before(@TempDir Path temp) { + catalog = new InMemoryCatalog(); + catalog.initialize( + "in-memory", + ImmutableMap.of( + CatalogProperties.WAREHOUSE_LOCATION, + temp.toAbsolutePath().toString(), + CatalogProperties.FILE_IO_IMPL, + "org.apache.iceberg.inmemory.InMemoryFileIO")); + catalog.createNamespace(NS); + } + + @Test + public void replaceVsSchemaUpdateFailsAndPreservesSchema() { + Table table = catalog.buildTable(TABLE, SCHEMA).create(); + + Transaction replace = catalog.buildTable(TABLE, SCHEMA).replaceTransaction(); + replace.newFastAppend().appendFile(FILE_A).commit(); + + // concurrent schema update + table.updateSchema().addColumn("extra", Types.StringType.get()).commit(); + + assertThatThrownBy(replace::commitTransaction) + .isInstanceOf(org.apache.iceberg.exceptions.CommitFailedException.class) + .hasMessageContaining("replace transaction"); + + Table after = catalog.loadTable(TABLE); + assertThat(after.schema().asStruct()).isEqualTo(SCHEMA_WITH_EXTRA_COL.asStruct()); + } + + @Test + public void replaceVsPropertyWriteFailsAndPreservesProperty() { + Table table = catalog.buildTable(TABLE, SCHEMA).create(); + + Transaction replace = catalog.buildTable(TABLE, SCHEMA).replaceTransaction(); + replace.newFastAppend().appendFile(FILE_A).commit(); + + // concurrent property update + table.updateProperties().set("k1", "v1").commit(); + + assertThatThrownBy(replace::commitTransaction) + .isInstanceOf(org.apache.iceberg.exceptions.CommitFailedException.class) + .hasMessageContaining("replace transaction"); + + Table after = catalog.loadTable(TABLE); + assertThat(after.properties()).containsEntry("k1", "v1"); + } + + @Test + public void replaceVsAppendFailsAndPreservesCommittedData() { + catalog.buildTable(TABLE, SCHEMA).create(); + + Transaction replace = catalog.buildTable(TABLE, SCHEMA).replaceTransaction(); + replace.newFastAppend().appendFile(FILE_A).commit(); + + // concurrent append + catalog.loadTable(TABLE).newFastAppend().appendFile(FILE_B).commit(); + + assertThatThrownBy(replace::commitTransaction) + .isInstanceOf(org.apache.iceberg.exceptions.CommitFailedException.class) + .hasMessageContaining("replace transaction"); + + Table after = catalog.loadTable(TABLE); + // concurrent data remains reachable + assertThat(after.currentSnapshot()).isNotNull(); + assertThat(after.newScan().planFiles()).hasSize(1); + } + + @Test + public void replaceVsReplaceFailsSecondCommitAndPreservesFirst() { + catalog.buildTable(TABLE, SCHEMA).create(); + + Transaction secondReplace = catalog.buildTable(TABLE, SCHEMA).replaceTransaction(); + secondReplace.newFastAppend().appendFile(FILE_A).commit(); + + Transaction firstReplace = catalog.buildTable(TABLE, SCHEMA).replaceTransaction(); + firstReplace.newFastAppend().appendFile(FILE_B).commit(); + firstReplace.commitTransaction(); + + assertThatThrownBy(secondReplace::commitTransaction) + .isInstanceOf(org.apache.iceberg.exceptions.CommitFailedException.class) + .hasMessageContaining("replace transaction"); + } + + @Test + public void replaceVsExpireSnapshotsFailsAndDoesNotResurrectExpiredSnapshot() { + Table table = catalog.buildTable(TABLE, SCHEMA).create(); + table.newFastAppend().appendFile(FILE_A).commit(); + long snapshotId = table.currentSnapshot().snapshotId(); + table.newFastAppend().appendFile(FILE_B).commit(); + + Transaction replace = catalog.buildTable(TABLE, SCHEMA).replaceTransaction(); + replace.newFastAppend().appendFile(FILE_B).commit(); + + // concurrent expire + table.expireSnapshots().expireSnapshotId(snapshotId).commit(); + + assertThatThrownBy(replace::commitTransaction) + .isInstanceOf(org.apache.iceberg.exceptions.CommitFailedException.class) + .hasMessageContaining("replace transaction"); + + Table after = catalog.loadTable(TABLE); + assertThat(after.snapshot(snapshotId)).isNull(); + } + + @Test + public void replaceVsMultipleConcurrentChangesFailsAndPreservesAll() { + Table table = catalog.buildTable(TABLE, SCHEMA).create(); + + Transaction replace = catalog.buildTable(TABLE, SCHEMA).replaceTransaction(); + replace.newFastAppend().appendFile(FILE_A).commit(); + + // concurrent changes + table.updateSchema().addColumn("extra", Types.StringType.get()).commit(); + table.updateProperties().set("k1", "v1").commit(); + + assertThatThrownBy(replace::commitTransaction) + .isInstanceOf(org.apache.iceberg.exceptions.CommitFailedException.class) + .hasMessageContaining("replace transaction"); + + Table after = catalog.loadTable(TABLE); + assertThat(after.schema().asStruct()).isEqualTo(SCHEMA_WITH_EXTRA_COL.asStruct()); + assertThat(after.properties()).containsEntry("k1", "v1"); + } +} Review Comment: ``` Added 4 additional tests: createOrReplaceVsSchemaUpdateFailsAndPreservesSchema — createOrReplaceTransaction (orCreate=true) on an existing table detects concurrent schema update and fails, preserving the concurrently-added column. createOrReplaceNewTableSucceeds — createOrReplaceTransaction for a table that doesn't exist yet succeeds normally (happy-path / no conflict). createOrReplaceVsPropertyWriteFailsAndPreservesProperty — createOrReplaceTransaction on an existing table detects concurrent property write and fails. replaceV3TableVsConcurrentAppendFails — creates a v3 format table, starts a replace transaction, makes a concurrent append (which would advance next-row-id), and verifies the replace fails instead of committing stale row lineage metadata. ``` -- This is an automated message from the Apache Git Service. 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