[GitHub] [gobblin] Will-Lo commented on a change in pull request #3461: [GOBBLIN-1604] Throw exception if there are no allocated requests due to lack of res…

[GitBox <gi...@apache.org>]

Will-Lo commented on a change in pull request #3461:
URL: https://github.com/apache/gobblin/pull/3461#discussion_r801113134



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File path: gobblin-data-management/src/test/java/org/apache/gobblin/data/management/copy/CopySourceTest.java
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@@ -196,6 +196,114 @@ public void testSubmitUnfulfilledRequestEvents()
     Assert.assertEquals(fileSet.getTotalSizeInBytes(), 75);
   }
 
+  @Test(expectedExceptions = IOException.class)
+  public void testFailIfAllAllocationRequestsRejected()
+      throws IOException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+    SourceState state = new SourceState();
+
+    state.setProp(ConfigurationKeys.SOURCE_FILEBASED_FS_URI, "file:///");
+    state.setProp(ConfigurationKeys.WRITER_FILE_SYSTEM_URI, "file:///");
+    state.setProp(ConfigurationKeys.DATA_PUBLISHER_FINAL_DIR, "/target/dir");
+    state.setProp(DatasetUtils.DATASET_PROFILE_CLASS_KEY,
+        TestCopyablePartitionableDatasedFinder.class.getCanonicalName());
+    state.setProp(CopySource.MAX_CONCURRENT_LISTING_SERVICES, 2);
+    state.setProp(CopyConfiguration.MAX_COPY_PREFIX + ".size", "50");
+    state.setProp(CopyConfiguration.MAX_COPY_PREFIX + ".copyEntities", "2");
+    state.setProp(CopyConfiguration.STORE_REJECTED_REQUESTS_KEY,
+        RequestAllocatorConfig.StoreRejectedRequestsConfig.ALL.name().toLowerCase());
+    state.setProp(ConfigurationKeys.METRICS_CUSTOM_BUILDERS, "org.apache.gobblin.metrics.ConsoleEventReporterFactory");
+
+    CopySource source = new CopySource();
+
+    final FileSystem sourceFs = HadoopUtils.getSourceFileSystem(state);
+    final FileSystem targetFs = HadoopUtils.getWriterFileSystem(state, 1, 0);
+
+    int maxThreads = state
+        .getPropAsInt(CopySource.MAX_CONCURRENT_LISTING_SERVICES, CopySource.DEFAULT_MAX_CONCURRENT_LISTING_SERVICES);
+
+    final CopyConfiguration copyConfiguration = CopyConfiguration.builder(targetFs, state.getProperties()).build();
+
+    MetricContext metricContext = Instrumented.getMetricContext(state, CopySource.class);
+    EventSubmitter eventSubmitter = new EventSubmitter.Builder(metricContext, CopyConfiguration.COPY_PREFIX).build();
+    DatasetsFinder<CopyableDatasetBase> datasetFinder = DatasetUtils
+        .instantiateDatasetFinder(state.getProperties(), sourceFs, CopySource.DEFAULT_DATASET_PROFILE_CLASS_KEY,
+            eventSubmitter, state);
+
+    IterableDatasetFinder<CopyableDatasetBase> iterableDatasetFinder =
+        datasetFinder instanceof IterableDatasetFinder ? (IterableDatasetFinder<CopyableDatasetBase>) datasetFinder
+            : new IterableDatasetFinderImpl<>(datasetFinder);
+
+    Iterator<CopyableDatasetRequestor> requesterIteratorWithNulls = Iterators
+        .transform(iterableDatasetFinder.getDatasetsIterator(),
+            new CopyableDatasetRequestor.Factory(targetFs, copyConfiguration, log));
+    Iterator<CopyableDatasetRequestor> requesterIterator =
+        Iterators.filter(requesterIteratorWithNulls, Predicates.<CopyableDatasetRequestor>notNull());
+
+    Method m = CopySource.class.getDeclaredMethod("createRequestAllocator", CopyConfiguration.class, int.class);
+    m.setAccessible(true);
+    PriorityIterableBasedRequestAllocator<FileSet<CopyEntity>> allocator =
+        (PriorityIterableBasedRequestAllocator<FileSet<CopyEntity>>) m.invoke(source, copyConfiguration, maxThreads);
+    Iterator<FileSet<CopyEntity>> prioritizedFileSets =
+        allocator.allocateRequests(requesterIterator, copyConfiguration.getMaxToCopy());
+    List<FileSet<CopyEntity>> fileSetList = allocator.getRequestsExceedingAvailableResourcePool();
+    Assert.assertEquals(fileSetList.size(), 2);

Review comment:
       It's created from `TestCopyableDataset`, which creates a default of 10 files of size 15 each




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