HADOOP-17385. ITestS3ADeleteCost.testDirMarkersFileCreation failure (#2473). Contributed by Steve Loughran

The addition of deprecated S3A configuration options in HADOOP-17318
triggered a reload of default (xml resource) configurations, which breaks
tests which fail if there's a per-bucket setting inconsistent with test
setup.

Creating an S3AFS instance before creating the Configuration() instance
for test runs gets that reload out the way before test setup takes
place.

Along with the fix, extra changes in the failing test suite to fail
fast when marker policy isn't as expected, and to log FS state better.

Rather than create and discard an instance, add a new static method
to S3AFS and invoke it in test setup. This forces the load

Change-Id: Id52b1c46912c6fedd2ae270e2b1eb2222a360329

hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java

@@ -4954,6 +4954,15 @@ public MarkerToolOperations createMarkerToolOperations() {
     return new MarkerToolOperationsImpl(operationCallbacks);
   }
 
+  /**
+   * This is purely for testing, as it force initializes all static
+   * initializers. See HADOOP-17385 for details.
+   */
+  @InterfaceAudience.Private
+  public static void initializeClass() {
+    LOG.debug("Initialize S3A class");
+  }
+
   /**
    * The implementation of context accessors.
    */

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/contract/s3a/S3AContract.java

@@ -21,6 +21,7 @@
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.contract.AbstractBondedFSContract;
+import org.apache.hadoop.fs.s3a.S3AFileSystem;
 import org.apache.hadoop.fs.s3a.S3ATestUtils;
 
 /**
@@ -53,6 +54,9 @@ public S3AContract(Configuration conf) {
    */
   public S3AContract(Configuration conf, boolean addContractResource) {
     super(conf);
+    // Force deprecated key load through the
+    // static initializers. See: HADOOP-17385
+    S3AFileSystem.initializeClass();
     //insert the base features
     if (addContractResource) {
       addConfResource(CONTRACT_XML);

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/AbstractS3ATestBase.java

@@ -60,6 +60,9 @@ public void setup() throws Exception {
     // filesystems which add default configuration resources to do it before
     // our tests start adding/removing options. See HADOOP-16626.
     FileSystem.getLocal(new Configuration());
+    // Force deprecated key load through the
+    // static initializers. See: HADOOP-17385
+    S3AFileSystem.initializeClass();
     super.setup();
   }
 

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/AbstractS3ACostTest.java

@@ -35,6 +35,7 @@
 import org.apache.hadoop.fs.s3a.S3AFileSystem;
 import org.apache.hadoop.fs.s3a.Statistic;
 import org.apache.hadoop.fs.s3a.Tristate;
+import org.apache.hadoop.fs.s3a.impl.DirectoryPolicy;
 import org.apache.hadoop.fs.s3a.impl.StatusProbeEnum;
 
 import static org.apache.hadoop.fs.s3a.Constants.*;
@@ -141,6 +142,14 @@ public void setup() throws Exception {
 
     isDeleting = !isKeeping;
 
+    // check that the FS has the expected state
+    DirectoryPolicy markerPolicy = fs.getDirectoryMarkerPolicy();
+    Assertions.assertThat(markerPolicy.getMarkerPolicy())
+        .describedAs("Marker policy for filesystem %s", fs)
+        .isEqualTo(isKeepingMarkers()
+            ? DirectoryPolicy.MarkerPolicy.Keep
+            : DirectoryPolicy.MarkerPolicy.Delete);
+
     // insert new metrics so as to keep the list sorted
     costValidator = OperationCostValidator.builder(getFileSystem())
         .withMetrics(

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3ADeleteCost.java

@@ -267,6 +267,7 @@ public void testDirMarkersFileCreation() throws Throwable {
 
     verifyMetrics(() -> {
       file(new Path(srcDir, "source.txt"));
+      LOG.info("Metrics: {}\n{}", getMetricSummary(), getFileSystem());
       return "after touch(fs, srcFilePath) " + getMetricSummary();
     },
         with(DIRECTORIES_CREATED, 0),