laserninja commented on code in PR #13153:
URL: https://github.com/apache/gravitino/pull/13153#discussion_r4074219862


##########
maintenance/jobs/src/main/java/org/apache/gravitino/maintenance/jobs/iceberg/RemoteLocationValidator.java:
##########
@@ -0,0 +1,74 @@
+/*
+ * 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.gravitino.maintenance.jobs.iceberg;
+
+import com.google.common.base.Preconditions;
+import java.io.IOException;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.RemoteIterator;
+
+/** Validates scan paths on Hadoop filesystems that can resolve symbolic 
links. */
+final class RemoteLocationValidator {
+  private RemoteLocationValidator() {}
+
+  static void validate(Configuration conf, String tableLocation, String 
location)
+      throws IOException {
+    Path scan = new Path(location);
+    FileSystem fs = scan.getFileSystem(conf);
+    validate(fs, new Path(tableLocation), scan);
+  }
+
+  static void validate(FileSystem fs, Path tableLocation, Path scan) throws 
IOException {
+    // Object stores do not support symbolic links. The URI containment check 
is sufficient there.
+    if (!fs.supportsSymlinks()) {
+      return;
+    }
+    Path root = fs.resolvePath(tableLocation);
+    IcebergRemoveOrphanFilesJob.validateLocation(root.toString(), 
fs.resolvePath(scan).toString());
+    for (Path ancestor = scan; ancestor != null; ancestor = 
ancestor.getParent()) {

Review Comment:
   Fixed in 7446e95d0. The ancestor walk now includes the table root and stops 
there. It uses the normalized lexical table root as the boundary, since a 
warehouse parent symlink can change the resolved path; resolved-path 
containment is still checked separately. Added regression tests for parent 
symlinks, inaccessible parents, normalized paths, whole-table scans, and 
rejection of symlinks within the table.



##########
maintenance/jobs/src/main/java/org/apache/gravitino/maintenance/jobs/iceberg/RemoteLocationValidator.java:
##########
@@ -0,0 +1,74 @@
+/*
+ * 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.gravitino.maintenance.jobs.iceberg;
+
+import com.google.common.base.Preconditions;
+import java.io.IOException;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.RemoteIterator;
+
+/** Validates scan paths on Hadoop filesystems that can resolve symbolic 
links. */
+final class RemoteLocationValidator {
+  private RemoteLocationValidator() {}
+
+  static void validate(Configuration conf, String tableLocation, String 
location)
+      throws IOException {
+    Path scan = new Path(location);
+    FileSystem fs = scan.getFileSystem(conf);
+    validate(fs, new Path(tableLocation), scan);
+  }
+
+  static void validate(FileSystem fs, Path tableLocation, Path scan) throws 
IOException {
+    // Object stores do not support symbolic links. The URI containment check 
is sufficient there.
+    if (!fs.supportsSymlinks()) {
+      return;
+    }
+    Path root = fs.resolvePath(tableLocation);
+    IcebergRemoveOrphanFilesJob.validateLocation(root.toString(), 
fs.resolvePath(scan).toString());
+    for (Path ancestor = scan; ancestor != null; ancestor = 
ancestor.getParent()) {
+      Preconditions.checkArgument(
+          !fs.getFileLinkStatus(ancestor).isSymlink(),
+          "Symlinks are not allowed in the scan location");
+    }
+    Deque<Path> pending = new ArrayDeque<>();
+    pending.add(scan);

Review Comment:
   Checked the source: these are already declared as `Deque<Path>` and 
`RemoteIterator<FileStatus>`. No raw types remain at these sites; the jobs 
build and formatting checks pass.



##########
maintenance/jobs/src/main/java/org/apache/gravitino/maintenance/jobs/iceberg/IcebergRemoveOrphanFilesJob.java:
##########
@@ -0,0 +1,280 @@
+/*
+ * 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.gravitino.maintenance.jobs.iceberg;
+
+import static org.apache.spark.sql.functions.lit;
+
+import com.google.common.base.Preconditions;
+import java.io.IOException;
+import java.net.URI;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Stream;
+import javax.annotation.Nullable;
+import org.apache.gravitino.job.JobTemplateProvider;
+import org.apache.gravitino.job.SparkJobTemplate;
+import org.apache.gravitino.maintenance.jobs.BuiltInJob;
+import 
org.apache.gravitino.maintenance.optimizer.common.util.IcebergSparkConfigUtils;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.spark.Spark3Util;
+import org.apache.spark.sql.AnalysisException;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.SparkSession;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/** Removes unreferenced Iceberg files after validating the requested scan 
location. */
+public class IcebergRemoveOrphanFilesJob implements BuiltInJob {
+  private static final Logger LOG = 
LoggerFactory.getLogger(IcebergRemoveOrphanFilesJob.class);
+  private static final String NAME =
+      JobTemplateProvider.BUILTIN_NAME_PREFIX + "iceberg-remove-orphan-files";
+
+  @Override
+  public SparkJobTemplate jobTemplate() {
+    return SparkJobTemplate.builder()
+        .withName(NAME)
+        .withComment("Built-in Iceberg orphan file cleanup job template")
+        .withExecutable(resolveExecutable(IcebergRemoveOrphanFilesJob.class))
+        .withClassName(IcebergRemoveOrphanFilesJob.class.getName())
+        .withArguments(
+            Arrays.asList(
+                "--catalog",
+                "{{catalog_name}}",
+                "--table",
+                "{{table_identifier}}",
+                "--older-than",
+                "{{older_than}}",
+                "--location",
+                "{{location}}",
+                "--dry-run",
+                "{{dry_run}}",
+                "--spark-conf",
+                "{{spark_conf}}"))
+        .withConfigs(IcebergSparkConfigUtils.buildTemplateSparkConfigs())
+        
.withCustomFields(Collections.singletonMap(JobTemplateProvider.PROPERTY_VERSION_KEY,
 "v1"))

Review Comment:
   Updated in 7446e95d0: added `VERSION` and extracted `buildArguments()` and 
`buildSparkConfigs()` to match the sibling jobs.



##########
maintenance/jobs/src/main/java/org/apache/gravitino/maintenance/jobs/iceberg/IcebergRemoveOrphanFilesJob.java:
##########
@@ -0,0 +1,280 @@
+/*
+ * 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.gravitino.maintenance.jobs.iceberg;
+
+import static org.apache.spark.sql.functions.lit;
+
+import com.google.common.base.Preconditions;
+import java.io.IOException;
+import java.net.URI;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Stream;
+import javax.annotation.Nullable;
+import org.apache.gravitino.job.JobTemplateProvider;
+import org.apache.gravitino.job.SparkJobTemplate;
+import org.apache.gravitino.maintenance.jobs.BuiltInJob;
+import 
org.apache.gravitino.maintenance.optimizer.common.util.IcebergSparkConfigUtils;
+import org.apache.iceberg.Table;
+import org.apache.iceberg.spark.Spark3Util;
+import org.apache.spark.sql.AnalysisException;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.SparkSession;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/** Removes unreferenced Iceberg files after validating the requested scan 
location. */
+public class IcebergRemoveOrphanFilesJob implements BuiltInJob {
+  private static final Logger LOG = 
LoggerFactory.getLogger(IcebergRemoveOrphanFilesJob.class);
+  private static final String NAME =
+      JobTemplateProvider.BUILTIN_NAME_PREFIX + "iceberg-remove-orphan-files";
+
+  @Override
+  public SparkJobTemplate jobTemplate() {
+    return SparkJobTemplate.builder()
+        .withName(NAME)
+        .withComment("Built-in Iceberg orphan file cleanup job template")
+        .withExecutable(resolveExecutable(IcebergRemoveOrphanFilesJob.class))
+        .withClassName(IcebergRemoveOrphanFilesJob.class.getName())
+        .withArguments(
+            Arrays.asList(
+                "--catalog",
+                "{{catalog_name}}",
+                "--table",
+                "{{table_identifier}}",
+                "--older-than",
+                "{{older_than}}",
+                "--location",
+                "{{location}}",
+                "--dry-run",
+                "{{dry_run}}",
+                "--spark-conf",
+                "{{spark_conf}}"))
+        .withConfigs(IcebergSparkConfigUtils.buildTemplateSparkConfigs())
+        
.withCustomFields(Collections.singletonMap(JobTemplateProvider.PROPERTY_VERSION_KEY,
 "v1"))
+        .build();
+  }
+
+  /**
+   * Runs orphan file cleanup using named arguments.
+   *
+   * <p>Required: {@code --catalog name --table db.table}. Optional: {@code 
--older-than 'yyyy-MM-dd
+   * HH:mm:ss'}, {@code --location path}, {@code --dry-run true|false}, and 
{@code --spark-conf
+   * json}. The cutoff defaults to three days ago and dry-run defaults to 
false. Iceberg's minimum
+   * retention interval is preserved. A custom location must be within the 
table.
+   *
+   * @param args named command-line arguments
+   */
+  public static void main(String[] args) {
+    int exitCode = run(args);
+    if (exitCode != 0) {
+      System.exit(exitCode);
+    }
+  }
+
+  static int run(String[] args) {
+    Map<String, String> options = IcebergJobUtils.parseArguments(args);
+    SparkSession.Builder builder =
+        SparkSession.builder().appName("Gravitino Built-in Iceberg Remove 
Orphan Files");
+    try {
+      requireOption(options, "catalog");
+      requireOption(options, "table");
+      parseDryRun(options.get("dry-run"));
+      
IcebergJobUtils.parseCustomSparkConfigs(options.get("spark-conf")).forEach(builder::config);
+    } catch (IllegalArgumentException e) {
+      LOG.error("Invalid remove orphan files job arguments: {}", 
e.getMessage());
+      printUsage();
+      return 1;
+    }
+
+    SparkSession spark = null;
+    try {
+      spark = builder.getOrCreate();
+      IcebergJobUtils.requireIcebergSparkRuntime();
+      execute(spark, options);
+      return 0;
+    } catch (IOException | AnalysisException | RuntimeException e) {
+      LOG.error("Error executing remove orphan files job", e);
+      return 1;
+    } finally {
+      if (spark != null) {
+        spark.stop();
+      }
+    }
+  }
+
+  static long execute(SparkSession spark, Map<String, String> options)
+      throws IOException, AnalysisException {
+    String catalog = requireOption(options, "catalog");
+    String identifier = requireOption(options, "table");
+    boolean dryRun = parseDryRun(options.get("dry-run"));
+    // Backslash escapes in string literals must retain Spark's default 
interpretation.
+    Preconditions.checkArgument(
+        
!Boolean.parseBoolean(spark.conf().get("spark.sql.parser.escapedStringLiterals",
 "false")),
+        "spark.sql.parser.escapedStringLiterals must be false");
+    Table table =
+        Spark3Util.loadIcebergTable(
+            spark, IcebergJobUtils.escapeSqlIdentifier(catalog) + "." + 
identifier);
+    String location = options.getOrDefault("location", table.location());
+    validateLocation(table.location(), location);
+    validateLocalLocation(table.location(), location);
+    validateRemoteLocation(spark, table.location(), location);
+    String sql =
+        buildProcedureCall(
+            catalog,
+            identifier,
+            options.get("older-than"),
+            normalizeLocation(location).toString(),
+            dryRun);
+    Iterator<Row> results = spark.sql(sql).toLocalIterator();

Review Comment:
   Verified that this is already declared as `Iterator<Row> results = 
spark.sql(sql).toLocalIterator();`. No change was needed here.



##########
maintenance/jobs/src/main/java/org/apache/gravitino/maintenance/jobs/iceberg/IcebergRemoveOrphanFilesJob.java:
##########
@@ -0,0 +1,280 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file

Review Comment:
   Compared the header directly with `IcebergExpireSnapshotsJob`: they match 
exactly, including the spacing in `agreements.  See` and the license URL 
indentation. Left the matching header unchanged.



##########
maintenance/jobs/src/test/java/org/apache/gravitino/maintenance/jobs/iceberg/TestIcebergRemoveOrphanFilesJob.java:
##########
@@ -0,0 +1,93 @@
+/*
+ * 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.gravitino.maintenance.jobs.iceberg;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.apache.gravitino.maintenance.jobs.BuiltInJobTemplateProvider;
+import org.junit.jupiter.api.Test;
+
+class TestIcebergRemoveOrphanFilesJob {
+  @Test

Review Comment:
   Updated all four new test classes and their test methods to `public` in 
7446e95d0. All 165 jobs tests pass, including the new regression tests.



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