HADOOP-16481. ITestS3GuardDDBRootOperations.test_300_MetastorePrune needs to set region. (#1209). Contributed by Steve Loughran.

hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/s3guard/ITestS3GuardDDBRootOperations.java

@@ -186,6 +186,7 @@ public class ITestS3GuardDDBRootOperations extends AbstractS3ATestBase {
     int result = S3GuardTool.run(conf,
         S3GuardTool.Prune.NAME,
         "-meta", checkNotNull(metastoreUriStr),
+        "-region", fs.getBucketLocation(),
         "-seconds", "1");
     Assertions.assertThat(result)
         .describedAs("Result of prune %s", fsUriStr)