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myskov pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/ozone.git


The following commit(s) were added to refs/heads/master by this push:
     new 340a7eacecc HDDS-13564. Convert redundant fields to local var in test 
modules (#8993)
340a7eacecc is described below

commit 340a7eacecc24ea2f151c1d716ca3359fdbb6e3f
Author: Ivan Zlenko <[email protected]>
AuthorDate: Sun Sep 7 13:18:08 2025 +0400

    HDDS-13564. Convert redundant fields to local var in test modules (#8993)
---
 .../ozone/common/TestChecksumImplsComputeSameValues.java     |  4 ++--
 .../hdds/security/ssl/TestReloadingX509KeyManager.java       |  3 +--
 .../x509/certificate/client/TestDnCertificateClientInit.java |  6 ++----
 .../apache/hadoop/hdds/utils/TestRDBSnapshotProvider.java    |  3 +--
 .../apache/hadoop/hdds/utils/db/TestTypedRDBTableStore.java  |  3 +--
 .../apache/ozone/rocksdiff/TestRocksDBCheckpointDiffer.java  |  6 ++----
 .../hdds/scm/cli/cert/TestCleanExpiredCertsSubcommand.java   |  3 +--
 .../hadoop/hdds/scm/cli/container/TestInfoSubCommand.java    |  5 ++---
 .../apache/hadoop/ozone/security/acl/TestOzoneObjInfo.java   | 12 +++++-------
 .../ozone/fs/http/server/metrics/TestHttpFSMetrics.java      |  3 +--
 .../org/apache/hadoop/ozone/recon/TestNSSummaryAdmin.java    |  3 +--
 .../apache/hadoop/ozone/recon/TestNSSummaryMemoryLeak.java   |  9 +++------
 .../hadoop/ozone/recon/TestReconContainerEndpoint.java       |  3 +--
 .../ozone/recon/TestReconInsightsForDeletedDirectories.java  |  6 ++----
 .../apache/hadoop/ozone/recon/TestReconWithOzoneManager.java |  5 ++---
 .../hadoop/ozone/recon/TestReconWithOzoneManagerFSO.java     |  3 +--
 .../org/apache/hadoop/ozone/s3/TestAuthorizationFilter.java  | 10 +++-------
 .../org/apache/hadoop/ozone/s3/TestS3GatewayAuditLog.java    |  3 +--
 .../org/apache/hadoop/ozone/s3/endpoint/TestBucketAcl.java   |  3 +--
 .../apache/hadoop/ozone/s3/endpoint/TestBucketDelete.java    |  3 +--
 .../org/apache/hadoop/ozone/s3/endpoint/TestBucketHead.java  |  3 +--
 .../org/apache/hadoop/ozone/s3/endpoint/TestBucketPut.java   |  3 +--
 .../ozone/s3/endpoint/TestMultipartUploadWithCopy.java       |  9 ++++-----
 .../hadoop/ozone/s3/endpoint/TestObjectTaggingDelete.java    |  9 +++------
 .../hadoop/ozone/s3/endpoint/TestUploadWithStream.java       |  3 +--
 .../apache/hadoop/ozone/s3/metrics/TestS3GatewayMetrics.java |  3 +--
 26 files changed, 45 insertions(+), 81 deletions(-)

diff --git 
a/hadoop-hdds/common/src/test/java/org/apache/hadoop/ozone/common/TestChecksumImplsComputeSameValues.java
 
b/hadoop-hdds/common/src/test/java/org/apache/hadoop/ozone/common/TestChecksumImplsComputeSameValues.java
index fed48f63ff6..3cb41fd586b 100644
--- 
a/hadoop-hdds/common/src/test/java/org/apache/hadoop/ozone/common/TestChecksumImplsComputeSameValues.java
+++ 
b/hadoop-hdds/common/src/test/java/org/apache/hadoop/ozone/common/TestChecksumImplsComputeSameValues.java
@@ -35,8 +35,8 @@
  */
 public class TestChecksumImplsComputeSameValues {
 
-  private int dataSize = 1024 * 1024 * 64;
-  private ByteBuffer data = ByteBuffer.allocate(dataSize);
+  private static final int DATA_SIZE = 1024 * 1024 * 64;
+  private ByteBuffer data = ByteBuffer.allocate(DATA_SIZE);
   private int[] bytesPerChecksum = {512, 1024, 2048, 4096, 32768, 1048576};
 
   @Test
diff --git 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/ssl/TestReloadingX509KeyManager.java
 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/ssl/TestReloadingX509KeyManager.java
index bf646e3bea6..6e4d352ddda 100644
--- 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/ssl/TestReloadingX509KeyManager.java
+++ 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/ssl/TestReloadingX509KeyManager.java
@@ -35,12 +35,11 @@
 public class TestReloadingX509KeyManager {
   private final LogCapturer reloaderLog =
       LogCapturer.captureLogs(ReloadingX509KeyManager.class);
-  private static OzoneConfiguration conf;
   private static CertificateClientTestImpl caClient;
 
   @BeforeAll
   public static void setUp() throws Exception {
-    conf = new OzoneConfiguration();
+    OzoneConfiguration conf = new OzoneConfiguration();
     caClient = new CertificateClientTestImpl(conf);
   }
 
diff --git 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/x509/certificate/client/TestDnCertificateClientInit.java
 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/x509/certificate/client/TestDnCertificateClientInit.java
index cf7de7b11f3..b3cd6a770ba 100644
--- 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/x509/certificate/client/TestDnCertificateClientInit.java
+++ 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/security/x509/certificate/client/TestDnCertificateClientInit.java
@@ -56,9 +56,7 @@
 public class TestDnCertificateClientInit {
 
   private KeyPair keyPair;
-  private String certSerialId = "3284792342234";
   private DNCertificateClient dnCertificateClient;
-  private HDDSKeyGenerator keyGenerator;
   @TempDir
   private Path metaDirPath;
   private SecurityConfig securityConfig;
@@ -84,10 +82,10 @@ public void setUp() throws Exception {
     OzoneConfiguration config = new OzoneConfiguration();
     config.set(HDDS_METADATA_DIR_NAME, metaDirPath.toString());
     securityConfig = new SecurityConfig(config);
-    keyGenerator = new HDDSKeyGenerator(securityConfig);
+    HDDSKeyGenerator keyGenerator = new HDDSKeyGenerator(securityConfig);
     keyPair = keyGenerator.generateKey();
     x509Certificate = getX509Certificate();
-    certSerialId = x509Certificate.getSerialNumber().toString();
+    String certSerialId = x509Certificate.getSerialNumber().toString();
     DatanodeDetails dn = MockDatanodeDetails.randomDatanodeDetails();
     dnCertificateClient =
         new DNCertificateClient(
diff --git 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/TestRDBSnapshotProvider.java
 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/TestRDBSnapshotProvider.java
index 458a87b6682..f8a1acf8739 100644
--- 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/TestRDBSnapshotProvider.java
+++ 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/TestRDBSnapshotProvider.java
@@ -72,7 +72,6 @@ public class TestRDBSnapshotProvider {
   public static final int MAX_DB_UPDATES_SIZE_THRESHOLD = 80;
 
   private RDBStore rdbStore = null;
-  private ManagedDBOptions options = null;
   private Set<TableConfig> configSet;
   private RDBSnapshotProvider rdbSnapshotProvider;
   private File testDir;
@@ -85,7 +84,7 @@ public class TestRDBSnapshotProvider {
   public void init(@TempDir File tempDir) throws Exception {
     CodecBuffer.enableLeakDetection();
 
-    options = getNewDBOptions();
+    ManagedDBOptions options = getNewDBOptions();
     configSet = new HashSet<>();
     for (String name : families) {
       TableConfig newConfig = new TableConfig(name,
diff --git 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/db/TestTypedRDBTableStore.java
 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/db/TestTypedRDBTableStore.java
index b089b87737c..f721894c0a3 100644
--- 
a/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/db/TestTypedRDBTableStore.java
+++ 
b/hadoop-hdds/framework/src/test/java/org/apache/hadoop/hdds/utils/db/TestTypedRDBTableStore.java
@@ -68,13 +68,12 @@ public class TestTypedRDBTableStore {
           "Sixth", "Seven", "Eighth",
           "Ninth", "Ten");
   private RDBStore rdbStore = null;
-  private ManagedDBOptions options = null;
 
   @BeforeEach
   public void setUp(@TempDir File tempDir) throws Exception {
     CodecBuffer.enableLeakDetection();
 
-    options = new ManagedDBOptions();
+    ManagedDBOptions options = new ManagedDBOptions();
     options.setCreateIfMissing(true);
     options.setCreateMissingColumnFamilies(true);
 
diff --git 
a/hadoop-hdds/rocksdb-checkpoint-differ/src/test/java/org/apache/ozone/rocksdiff/TestRocksDBCheckpointDiffer.java
 
b/hadoop-hdds/rocksdb-checkpoint-differ/src/test/java/org/apache/ozone/rocksdiff/TestRocksDBCheckpointDiffer.java
index 5b6fc39f237..bc21904f9c0 100644
--- 
a/hadoop-hdds/rocksdb-checkpoint-differ/src/test/java/org/apache/ozone/rocksdiff/TestRocksDBCheckpointDiffer.java
+++ 
b/hadoop-hdds/rocksdb-checkpoint-differ/src/test/java/org/apache/ozone/rocksdiff/TestRocksDBCheckpointDiffer.java
@@ -312,12 +312,10 @@ public class TestRocksDBCheckpointDiffer {
   private File metadataDirDir;
   private File compactionLogDir;
   private File sstBackUpDir;
-  private ConfigurationSource config;
   private ExecutorService executorService = Executors.newCachedThreadPool();
   private RocksDBCheckpointDiffer rocksDBCheckpointDiffer;
   private ManagedRocksDB activeRocksDB;
 
-  private ManagedDBOptions dbOptions;
   private ColumnFamilyHandle keyTableCFHandle;
   private ColumnFamilyHandle directoryTableCFHandle;
   private ColumnFamilyHandle fileTableCFHandle;
@@ -354,7 +352,7 @@ public void init() throws RocksDBException {
     sstBackUpDir = new File(METADATA_DIR_NAME, SST_BACK_UP_DIR_NAME);
     createDir(sstBackUpDir, METADATA_DIR_NAME + "/" + SST_BACK_UP_DIR_NAME);
 
-    config = mock(ConfigurationSource.class);
+    ConfigurationSource config = mock(ConfigurationSource.class);
 
     when(config.getTimeDuration(
         OZONE_OM_SNAPSHOT_COMPACTION_DAG_MAX_TIME_ALLOWED,
@@ -387,7 +385,7 @@ public void init() throws RocksDBException {
     cfOpts.optimizeUniversalStyleCompaction();
     List<ColumnFamilyDescriptor> cfDescriptors = getCFDescriptorList(cfOpts);
     List<ColumnFamilyHandle> cfHandles = new ArrayList<>();
-    dbOptions = new ManagedDBOptions();
+    ManagedDBOptions dbOptions = new ManagedDBOptions();
     dbOptions.setCreateIfMissing(true);
     dbOptions.setCreateMissingColumnFamilies(true);
 
diff --git 
a/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/cert/TestCleanExpiredCertsSubcommand.java
 
b/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/cert/TestCleanExpiredCertsSubcommand.java
index 1a421dd7563..cdf831ec137 100644
--- 
a/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/cert/TestCleanExpiredCertsSubcommand.java
+++ 
b/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/cert/TestCleanExpiredCertsSubcommand.java
@@ -40,7 +40,6 @@
 class TestCleanExpiredCertsSubcommand {
 
   private SCMSecurityProtocol scmSecurityProtocolMock;
-  private CleanExpiredCertsSubcommand cmd;
   private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
   private final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
   private final PrintStream originalOut = System.out;
@@ -63,7 +62,7 @@ public void tearDown() {
 
   @Test
   public void testCleaningOneCertificate() throws Exception {
-    cmd = new CleanExpiredCertsSubcommand();
+    CleanExpiredCertsSubcommand cmd = new CleanExpiredCertsSubcommand();
     KeyPair keyPair = CertificateTestUtils.aKeyPair(new OzoneConfiguration());
     X509Certificate cert = createSelfSignedCert(keyPair, "aCert");
     ArrayList<String> certPemList = new ArrayList<>();
diff --git 
a/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/container/TestInfoSubCommand.java
 
b/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/container/TestInfoSubCommand.java
index c5a60110fc4..a0bee39530d 100644
--- 
a/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/container/TestInfoSubCommand.java
+++ 
b/hadoop-ozone/cli-admin/src/test/java/org/apache/hadoop/hdds/scm/cli/container/TestInfoSubCommand.java
@@ -70,7 +70,6 @@ public class TestInfoSubCommand {
 
   private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
   private final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
-  private ByteArrayInputStream inContent;
   private final PrintStream originalOut = System.out;
   private final PrintStream originalErr = System.err;
   private final InputStream originalIn = System.in;
@@ -128,7 +127,7 @@ public void testMultipleContainersCanBePassed() throws 
Exception {
   @Test
   public void testContainersCanBeReadFromStdin() throws IOException {
     String input = "1\n123\n456\ninvalid\n789\n";
-    inContent = new ByteArrayInputStream(input.getBytes(DEFAULT_ENCODING));
+    ByteArrayInputStream inContent = new 
ByteArrayInputStream(input.getBytes(DEFAULT_ENCODING));
     System.setIn(inContent);
     cmd = new InfoSubcommand();
     CommandLine c = new CommandLine(cmd);
@@ -155,7 +154,7 @@ private void validateMultiOutput() throws 
UnsupportedEncodingException {
   public void testContainersCanBeReadFromStdinJson()
       throws IOException {
     String input = "1\n123\n456\ninvalid\n789\n";
-    inContent = new ByteArrayInputStream(input.getBytes(DEFAULT_ENCODING));
+    ByteArrayInputStream inContent = new 
ByteArrayInputStream(input.getBytes(DEFAULT_ENCODING));
     System.setIn(inContent);
     cmd = new InfoSubcommand();
     CommandLine c = new CommandLine(cmd);
diff --git 
a/hadoop-ozone/common/src/test/java/org/apache/hadoop/ozone/security/acl/TestOzoneObjInfo.java
 
b/hadoop-ozone/common/src/test/java/org/apache/hadoop/ozone/security/acl/TestOzoneObjInfo.java
index 9c76f02f0e5..58e84b2dea5 100644
--- 
a/hadoop-ozone/common/src/test/java/org/apache/hadoop/ozone/security/acl/TestOzoneObjInfo.java
+++ 
b/hadoop-ozone/common/src/test/java/org/apache/hadoop/ozone/security/acl/TestOzoneObjInfo.java
@@ -31,8 +31,6 @@
  * */
 public class TestOzoneObjInfo {
 
-  private OzoneObjInfo objInfo;
-  private OzoneObjInfo.Builder builder;
   private String volume = "vol1";
   private String bucket = "bucket1";
   private String key = "key1";
@@ -41,8 +39,8 @@ public class TestOzoneObjInfo {
   @Test
   public void testGetVolumeName() {
 
-    builder = getBuilder(volume, bucket, key);
-    objInfo = builder.build();
+    OzoneObjInfo.Builder builder = getBuilder(volume, bucket, key);
+    OzoneObjInfo objInfo = builder.build();
     assertEquals(objInfo.getVolumeName(), volume);
 
     objInfo = getBuilder(null, null, null).build();
@@ -65,7 +63,7 @@ private OzoneObjInfo.Builder getBuilder(String withVolume,
 
   @Test
   public void testGetBucketName() {
-    objInfo = getBuilder(volume, bucket, key).build();
+    OzoneObjInfo objInfo = getBuilder(volume, bucket, key).build();
     assertEquals(objInfo.getBucketName(), bucket);
 
     objInfo = getBuilder(volume, null, null).build();
@@ -77,7 +75,7 @@ public void testGetBucketName() {
 
   @Test
   public void testGetKeyName() {
-    objInfo = getBuilder(volume, bucket, key).build();
+    OzoneObjInfo objInfo = getBuilder(volume, bucket, key).build();
     assertEquals(objInfo.getKeyName(), key);
 
     objInfo = getBuilder(volume, null, null).build();
@@ -102,7 +100,7 @@ public void testFromProtobufOp() {
             bucket + OZONE_URI_DELIMITER + key)
         .build();
 
-    objInfo = OzoneObjInfo.fromProtobuf(protoObj);
+    OzoneObjInfo objInfo = OzoneObjInfo.fromProtobuf(protoObj);
     assertEquals(objInfo.getKeyName(), key);
     objInfo = getBuilder(volume, null, null).build();
     assertNull(objInfo.getKeyName());
diff --git 
a/hadoop-ozone/httpfsgateway/src/test/java/org/apache/ozone/fs/http/server/metrics/TestHttpFSMetrics.java
 
b/hadoop-ozone/httpfsgateway/src/test/java/org/apache/ozone/fs/http/server/metrics/TestHttpFSMetrics.java
index fe909631425..fd2821ec7ae 100644
--- 
a/hadoop-ozone/httpfsgateway/src/test/java/org/apache/ozone/fs/http/server/metrics/TestHttpFSMetrics.java
+++ 
b/hadoop-ozone/httpfsgateway/src/test/java/org/apache/ozone/fs/http/server/metrics/TestHttpFSMetrics.java
@@ -52,7 +52,6 @@ public class TestHttpFSMetrics {
   private static FileSystem mockFs = mock(FileSystem.class);
   private static FSDataOutputStream fsDataOutputStream = 
mock(FSDataOutputStream.class);
 
-  private HttpFSServerWebApp webApp;
   private HttpFSServerMetrics metrics;
   private Configuration conf;
   private UserGroupInformation ugi;
@@ -74,7 +73,7 @@ public void setUp() throws Exception {
     conf = new Configuration();
     conf.setBoolean(FILE_SYSTEM_SERVICE_CREATED, true);
 
-    webApp = new HttpFSServerWebApp();
+    HttpFSServerWebApp webApp = new HttpFSServerWebApp();
     webApp.init();
     webApp.setService(MockFileSystemAccessService.class);
 
diff --git 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryAdmin.java
 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryAdmin.java
index 6523ab97ff7..4e8e595d3c4 100644
--- 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryAdmin.java
+++ 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryAdmin.java
@@ -44,7 +44,6 @@ public class TestNSSummaryAdmin extends 
StandardOutputTestBase {
   private static ObjectStore store;
 
   private static OzoneAdmin ozoneAdmin;
-  private static OzoneConfiguration conf;
   private static MiniOzoneCluster cluster;
 
   private static String volumeName;
@@ -55,7 +54,7 @@ public class TestNSSummaryAdmin extends 
StandardOutputTestBase {
   @BeforeAll
   public static void init() throws Exception {
     ozoneAdmin = new OzoneAdmin();
-    conf = ozoneAdmin.getOzoneConf();
+    OzoneConfiguration conf = ozoneAdmin.getOzoneConf();
     OMRequestTestUtils.configureFSOptimizedPaths(conf, true);
     conf.set(OZONE_RECON_ADDRESS_KEY, "localhost:9888");
     cluster = MiniOzoneCluster.newBuilder(conf)
diff --git 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryMemoryLeak.java
 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryMemoryLeak.java
index 50e85f7d8c8..5bdfe32aa02 100644
--- 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryMemoryLeak.java
+++ 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestNSSummaryMemoryLeak.java
@@ -124,15 +124,12 @@ public class TestNSSummaryMemoryLeak {
 
   private static MiniOzoneCluster cluster;
   private static FileSystem fs;
-  private static String volumeName;
-  private static String bucketName;
   private static OzoneClient client;
   private static ReconService recon;
-  private static OzoneConfiguration conf;
 
   @BeforeAll
   public static void init() throws Exception {
-    conf = new OzoneConfiguration();
+    OzoneConfiguration conf = new OzoneConfiguration();
     // Configure delays for testing
     conf.setInt(OZONE_DIR_DELETING_SERVICE_INTERVAL, 1000000);
     conf.setTimeDuration(OZONE_BLOCK_DELETING_SERVICE_INTERVAL, 10000000, 
TimeUnit.MILLISECONDS);
@@ -149,8 +146,8 @@ public static void init() throws Exception {
     // Create FSO bucket for testing
     OzoneBucket bucket = TestDataUtil.createVolumeAndBucket(client,
         BucketLayout.FILE_SYSTEM_OPTIMIZED);
-    volumeName = bucket.getVolumeName();
-    bucketName = bucket.getName();
+    String volumeName = bucket.getVolumeName();
+    String bucketName = bucket.getName();
 
     String rootPath = String.format("%s://%s.%s/",
         OzoneConsts.OZONE_URI_SCHEME, bucketName, volumeName);
diff --git 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconContainerEndpoint.java
 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconContainerEndpoint.java
index bee3f5cdbcf..b278b14bc06 100644
--- 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconContainerEndpoint.java
+++ 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconContainerEndpoint.java
@@ -54,7 +54,6 @@
  */
 public class TestReconContainerEndpoint {
 
-  private OzoneConfiguration conf;
   private MiniOzoneCluster cluster;
   private OzoneClient client;
   private ObjectStore store;
@@ -63,7 +62,7 @@ public class TestReconContainerEndpoint {
 
   @BeforeEach
   public void init() throws Exception {
-    conf = new OzoneConfiguration();
+    OzoneConfiguration conf = new OzoneConfiguration();
     conf.set(OMConfigKeys.OZONE_DEFAULT_BUCKET_LAYOUT,
         OMConfigKeys.OZONE_BUCKET_LAYOUT_FILE_SYSTEM_OPTIMIZED);
     recon = new ReconService(conf);
diff --git 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconInsightsForDeletedDirectories.java
 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconInsightsForDeletedDirectories.java
index 2c926288c74..5e6fe7e4269 100644
--- 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconInsightsForDeletedDirectories.java
+++ 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconInsightsForDeletedDirectories.java
@@ -79,8 +79,6 @@ public class TestReconInsightsForDeletedDirectories {
 
   private static MiniOzoneCluster cluster;
   private static FileSystem fs;
-  private static String volumeName;
-  private static String bucketName;
   private static OzoneClient client;
   private static ReconService recon;
 
@@ -102,8 +100,8 @@ public static void init() throws Exception {
     // create a volume and a bucket to be used by OzoneFileSystem
     OzoneBucket bucket = TestDataUtil.createVolumeAndBucket(client,
         BucketLayout.FILE_SYSTEM_OPTIMIZED);
-    volumeName = bucket.getVolumeName();
-    bucketName = bucket.getName();
+    String volumeName = bucket.getVolumeName();
+    String bucketName = bucket.getName();
 
     String rootPath = String.format("%s://%s.%s/",
         OzoneConsts.OZONE_URI_SCHEME, bucketName, volumeName);
diff --git 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManager.java
 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManager.java
index 4f3a354edfa..dfdc3de2412 100644
--- 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManager.java
+++ 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManager.java
@@ -75,7 +75,6 @@
  */
 public class TestReconWithOzoneManager {
   private static MiniOzoneCluster cluster = null;
-  private static OzoneConfiguration conf;
   private static OMMetadataManager metadataManager;
   private static CloseableHttpClient httpClient;
   private static String taskStatusURL;
@@ -83,7 +82,7 @@ public class TestReconWithOzoneManager {
 
   @BeforeAll
   public static void init() throws Exception {
-    conf = new OzoneConfiguration();
+    OzoneConfiguration conf = new OzoneConfiguration();
     int socketTimeout = (int) conf.getTimeDuration(
         OZONE_RECON_OM_SOCKET_TIMEOUT,
         conf.get(
@@ -96,7 +95,7 @@ public static void init() throws Exception {
             ReconServerConfigKeys.RECON_OM_CONNECTION_TIMEOUT,
             OZONE_RECON_OM_CONNECTION_TIMEOUT_DEFAULT),
         TimeUnit.MILLISECONDS);
-    int connectionRequestTimeout = (int)conf.getTimeDuration(
+    int connectionRequestTimeout = (int) conf.getTimeDuration(
         OZONE_RECON_OM_CONNECTION_REQUEST_TIMEOUT,
         conf.get(
             ReconServerConfigKeys.RECON_OM_CONNECTION_REQUEST_TIMEOUT,
diff --git 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManagerFSO.java
 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManagerFSO.java
index 6eda5b1b967..51638133e96 100644
--- 
a/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManagerFSO.java
+++ 
b/hadoop-ozone/integration-test-recon/src/test/java/org/apache/hadoop/ozone/recon/TestReconWithOzoneManagerFSO.java
@@ -55,13 +55,12 @@ public class TestReconWithOzoneManagerFSO {
 
   private static OzoneClient client;
   private static MiniOzoneCluster cluster = null;
-  private static OzoneConfiguration conf;
   private static ObjectStore store;
   private static ReconService recon;
 
   @BeforeAll
   public static void init() throws Exception {
-    conf = new OzoneConfiguration();
+    OzoneConfiguration conf = new OzoneConfiguration();
     conf.set(OMConfigKeys.OZONE_DEFAULT_BUCKET_LAYOUT,
         OMConfigKeys.OZONE_BUCKET_LAYOUT_FILE_SYSTEM_OPTIMIZED);
     recon = new ReconService(conf);
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestAuthorizationFilter.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestAuthorizationFilter.java
index d29fa60a592..6df57448cad 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestAuthorizationFilter.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestAuthorizationFilter.java
@@ -62,10 +62,6 @@ public class TestAuthorizationFilter {
 
   private AuthorizationFilter authorizationFilter = new AuthorizationFilter();
 
-  private MultivaluedMap<String, String> headerMap;
-  private MultivaluedMap<String, String> queryMap;
-  private MultivaluedMap<String, String> pathParamsMap;
-
   private static final String DATETIME = StringToSignProducer.TIME_FORMATTER.
       format(LocalDateTime.now());
 
@@ -267,9 +263,9 @@ private ContainerRequestContext setupContext(
       String method, String authHeader, String contentMd5,
       String host, String amzContentSha256, String date, String contentType,
       String path) throws URISyntaxException {
-    headerMap = new MultivaluedHashMap<>();
-    queryMap = new MultivaluedHashMap<>();
-    pathParamsMap = new MultivaluedHashMap<>();
+    MultivaluedMap<String, String> headerMap = new MultivaluedHashMap<>();
+    MultivaluedMap<String, String> queryMap = new MultivaluedHashMap<>();
+    MultivaluedMap<String, String> pathParamsMap = new MultivaluedHashMap<>();
 
     System.err.println("Testing: " + authHeader);
     headerMap.putSingle(AUTHORIZATION_HEADER, authHeader);
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestS3GatewayAuditLog.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestS3GatewayAuditLog.java
index 5e1fd3fc594..ee1d78fe884 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestS3GatewayAuditLog.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/TestS3GatewayAuditLog.java
@@ -60,7 +60,6 @@ public class TestS3GatewayAuditLog {
   }
 
   private String bucketName = OzoneConsts.BUCKET;
-  private OzoneClient clientStub;
   private BucketEndpoint bucketEndpoint;
   private RootEndpoint rootEndpoint;
   private ObjectEndpoint keyEndpoint;
@@ -71,7 +70,7 @@ public class TestS3GatewayAuditLog {
   @BeforeEach
   public void setup() throws Exception {
     parametersMap.clear();
-    clientStub = new OzoneClientStub();
+    OzoneClient clientStub = new OzoneClientStub();
     clientStub.getObjectStore().createS3Bucket(bucketName);
     bucket = clientStub.getObjectStore().getS3Bucket(bucketName);
     requestIdentifier = new RequestIdentifier();
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketAcl.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketAcl.java
index 84bc414e37e..ffba1be4035 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketAcl.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketAcl.java
@@ -49,7 +49,6 @@ public class TestBucketAcl {
   private static final String BUCKET_NAME = OzoneConsts.S3_BUCKET;
   private OzoneClient client;
 
-  private HttpServletRequest servletRequest;
   private Map<String, String[]> parameterMap;
   private HttpHeaders headers;
   private BucketEndpoint bucketEndpoint;
@@ -60,7 +59,7 @@ public void setup() throws IOException {
     client = new OzoneClientStub();
     client.getObjectStore().createS3Bucket(BUCKET_NAME);
 
-    servletRequest = mock(HttpServletRequest.class);
+    HttpServletRequest servletRequest = mock(HttpServletRequest.class);
     parameterMap = mock(Map.class);
     headers = mock(HttpHeaders.class);
     when(servletRequest.getParameterMap()).thenReturn(parameterMap);
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketDelete.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketDelete.java
index 54841563aef..77af36f1b48 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketDelete.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketDelete.java
@@ -38,7 +38,6 @@
 public class TestBucketDelete {
 
   private String bucketName = OzoneConsts.BUCKET;
-  private OzoneClient clientStub;
   private ObjectStore objectStoreStub;
   private BucketEndpoint bucketEndpoint;
 
@@ -46,7 +45,7 @@ public class TestBucketDelete {
   public void setup() throws Exception {
 
     //Create client stub and object store stub.
-    clientStub = new OzoneClientStub();
+    OzoneClient clientStub = new OzoneClientStub();
     objectStoreStub = clientStub.getObjectStore();
 
     clientStub.getObjectStore().createS3Bucket(bucketName);
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketHead.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketHead.java
index 32f584c08d5..dce0a1df03b 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketHead.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketHead.java
@@ -35,12 +35,11 @@
 public class TestBucketHead {
 
   private String bucketName = OzoneConsts.BUCKET;
-  private OzoneClient clientStub;
   private BucketEndpoint bucketEndpoint;
 
   @BeforeEach
   public void setup() throws Exception {
-    clientStub = new OzoneClientStub();
+    OzoneClient clientStub = new OzoneClientStub();
     clientStub.getObjectStore().createS3Bucket(bucketName);
 
     // Create HeadBucket and setClient to OzoneClientStub
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketPut.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketPut.java
index 00543678234..0464ff54edc 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketPut.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestBucketPut.java
@@ -39,14 +39,13 @@
 public class TestBucketPut {
 
   private String bucketName = OzoneConsts.BUCKET;
-  private OzoneClient clientStub;
   private BucketEndpoint bucketEndpoint;
 
   @BeforeEach
   public void setup() throws Exception {
 
     //Create client stub and object store stub.
-    clientStub = new OzoneClientStub();
+    OzoneClient clientStub = new OzoneClientStub();
 
     // Create HeadBucket and setClient to OzoneClientStub
     bucketEndpoint = EndpointBuilder.newBucketEndpointBuilder()
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestMultipartUploadWithCopy.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestMultipartUploadWithCopy.java
index 5189ddf39aa..a06811434ff 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestMultipartUploadWithCopy.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestMultipartUploadWithCopy.java
@@ -72,7 +72,6 @@ public class TestMultipartUploadWithCopy {
   private static final String EXISTING_KEY_CONTENT = "testkey";
   private static final OzoneClient CLIENT = new OzoneClientStub();
   private static final long DELAY_MS = 2000;
-  private static long sourceKeyLastModificationTime;
   private static String beforeSourceKeyModificationTimeStr;
   private static String afterSourceKeyModificationTimeStr;
   private static String futureTimeStr;
@@ -99,10 +98,10 @@ public static void setUp() throws Exception {
       stream.write(keyContent);
     }
 
-    sourceKeyLastModificationTime = CLIENT.getObjectStore()
-        .getS3Bucket(OzoneConsts.S3_BUCKET)
-        .getKey(EXISTING_KEY)
-        .getModificationTime().toEpochMilli();
+    long sourceKeyLastModificationTime = CLIENT.getObjectStore()
+                                             
.getS3Bucket(OzoneConsts.S3_BUCKET)
+                                             .getKey(EXISTING_KEY)
+                                             
.getModificationTime().toEpochMilli();
     beforeSourceKeyModificationTimeStr =
         OzoneUtils.formatTime(sourceKeyLastModificationTime - 1000);
     afterSourceKeyModificationTimeStr =
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestObjectTaggingDelete.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestObjectTaggingDelete.java
index 04c4bfd65c1..81a260ff4f2 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestObjectTaggingDelete.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestObjectTaggingDelete.java
@@ -61,11 +61,8 @@ public class TestObjectTaggingDelete {
   private static final String CONTENT = "0123456789";
   private static final String BUCKET_NAME = "b1";
   private static final String KEY_WITH_TAG = "keyWithTag";
-  private HttpHeaders headers;
   private ObjectEndpoint rest;
   private OzoneClient client;
-  private ByteArrayInputStream body;
-  private ContainerRequestContext context;
 
   @BeforeEach
   public void init() throws OS3Exception, IOException {
@@ -74,14 +71,14 @@ public void init() throws OS3Exception, IOException {
     client = new OzoneClientStub();
     client.getObjectStore().createS3Bucket(BUCKET_NAME);
 
-    headers = Mockito.mock(HttpHeaders.class);
+    HttpHeaders headers = Mockito.mock(HttpHeaders.class);
     rest = EndpointBuilder.newObjectEndpointBuilder()
         .setClient(client)
         .setConfig(config)
         .setHeaders(headers)
         .build();
 
-    body = new ByteArrayInputStream(CONTENT.getBytes(UTF_8));
+    ByteArrayInputStream body = new 
ByteArrayInputStream(CONTENT.getBytes(UTF_8));
     // Create a key with object tags
     
Mockito.when(headers.getHeaderString(TAG_HEADER)).thenReturn("tag1=value1&tag2=value2");
     Mockito.when(headers.getHeaderString(X_AMZ_CONTENT_SHA256))
@@ -90,7 +87,7 @@ public void init() throws OS3Exception, IOException {
         1, null, null, null, body);
 
 
-    context = Mockito.mock(ContainerRequestContext.class);
+    ContainerRequestContext context = 
Mockito.mock(ContainerRequestContext.class);
     Mockito.when(context.getUriInfo()).thenReturn(Mockito.mock(UriInfo.class));
     Mockito.when(context.getUriInfo().getQueryParameters())
         .thenReturn(new MultivaluedHashMap<>());
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestUploadWithStream.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestUploadWithStream.java
index 02026c2ef9c..7ed2c488c44 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestUploadWithStream.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/endpoint/TestUploadWithStream.java
@@ -62,7 +62,6 @@ public class TestUploadWithStream {
   private ObjectEndpoint rest;
 
   private OzoneClient client;
-  private ContainerRequestContext context;
 
   @BeforeEach
   public void setUp() throws Exception {
@@ -79,7 +78,7 @@ public void setUp() throws Exception {
     conf.setStorageSize(OZONE_FS_DATASTREAM_AUTO_THRESHOLD, 1,
         StorageUnit.BYTES);
 
-    context = mock(ContainerRequestContext.class);
+    ContainerRequestContext context = mock(ContainerRequestContext.class);
     when(context.getUriInfo()).thenReturn(mock(UriInfo.class));
     when(context.getUriInfo().getQueryParameters())
         .thenReturn(new MultivaluedHashMap<>());
diff --git 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/metrics/TestS3GatewayMetrics.java
 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/metrics/TestS3GatewayMetrics.java
index 531d45b328f..600df053c4e 100644
--- 
a/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/metrics/TestS3GatewayMetrics.java
+++ 
b/hadoop-ozone/s3gateway/src/test/java/org/apache/hadoop/ozone/s3/metrics/TestS3GatewayMetrics.java
@@ -75,7 +75,6 @@ public class TestS3GatewayMetrics {
   private static final String ACL_MARKER = "acl";
   private static final String CONTENT = "0123456789";
   private S3GatewayMetrics metrics;
-  private ContainerRequestContext context;
 
   @BeforeEach
   public void setup() throws Exception {
@@ -104,7 +103,7 @@ public void setup() throws Exception {
     keyEndpoint.setHeaders(headers);
     metrics = bucketEndpoint.getMetrics();
 
-    context = mock(ContainerRequestContext.class);
+    ContainerRequestContext context = mock(ContainerRequestContext.class);
     when(context.getUriInfo()).thenReturn(mock(UriInfo.class));
     when(context.getUriInfo().getQueryParameters())
         .thenReturn(new MultivaluedHashMap<>());


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