[Pulsar client] Enable spotbugs in module pulsar-client.

pulsar-client/pom.xml

@@ -210,6 +210,22 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>com.github.spotbugs</groupId>
+        <artifactId>spotbugs-maven-plugin</artifactId>
+        <configuration>
+          <excludeFilterFile>${basedir}/src/main/resources/findbugsExclude.xml</excludeFilterFile>
+        </configuration>
+        <executions>
+          <execution>
+            <id>spotbugs</id>
+            <phase>verify</phase>
+            <goals>
+              <goal>check</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>
 </project>

pulsar-client/src/main/java/org/apache/pulsar/client/impl/BackoffBuilder.java

@@ -24,8 +24,6 @@
 import com.google.common.annotations.VisibleForTesting;
 
 public class BackoffBuilder {
-	private long backoffIntervalNanos;
-    private long maxBackoffIntervalNanos;
     private long initial;
     private TimeUnit unitInitial;
     private long max;
@@ -40,8 +38,6 @@ public class BackoffBuilder {
         this.max = 0;
         this.mandatoryStop = 0;
         this.clock = Clock.systemDefaultZone();
-        this.backoffIntervalNanos = 0;
-        this.maxBackoffIntervalNanos = 0;
     }
 
     public BackoffBuilder setInitialTime(long initial, TimeUnit unitInitial) {

pulsar-client/src/main/java/org/apache/pulsar/client/impl/BatchMessageIdImpl.java

@@ -24,6 +24,8 @@
 /**
  */
 public class BatchMessageIdImpl extends MessageIdImpl {
+
+    private static final long serialVersionUID = 1L;
     private final static int NO_BATCH = -1;
     private final int batchIndex;
     private final int batchSize;
@@ -92,7 +94,7 @@ public int compareTo(MessageId o) {
 
     @Override
     public int hashCode() {
-        return (int) (31 * (ledgerId + 31 * entryId) + (31 * partitionIndex) + batchIndex);
+        return (int) (31 * (ledgerId + 31 * entryId) + (31 * (long) partitionIndex) + batchIndex);
     }
 
     @Override

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerBase.java

@@ -478,7 +478,7 @@ protected CompletableFuture<Void> doAcknowledgeWithTxn(List<MessageId> messageId
                     .thenCompose(ignored -> doAcknowledge(messageIdList, ackType, properties, txn));
             txn.registerAckOp(ackFuture);
         } else {
-            ackFuture = doAcknowledge(messageIdList, ackType, properties, txn);
+            ackFuture = doAcknowledge(messageIdList, ackType, properties, null);
         }
         return ackFuture;
     }

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerBuilderImpl.java

@@ -434,7 +434,7 @@ public ConsumerBuilder<T> batchReceivePolicy(BatchReceivePolicy batchReceivePoli
 
     @Override
     public String toString() {
-        return conf != null ? conf.toString() : null;
+        return conf != null ? conf.toString() : "";
     }
 
     @Override

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerImpl.java

@@ -601,7 +601,7 @@ protected CompletableFuture<Void> doReconsumeLater(Message<?> message, AckType a
                 }
 
                 if (propertiesMap.containsKey(RetryMessageUtil.SYSTEM_PROPERTY_RECONSUMETIMES)) {
-                    reconsumetimes = Integer.valueOf(propertiesMap.get(RetryMessageUtil.SYSTEM_PROPERTY_RECONSUMETIMES));
+                    reconsumetimes = Integer.parseInt(propertiesMap.get(RetryMessageUtil.SYSTEM_PROPERTY_RECONSUMETIMES));
                     reconsumetimes = reconsumetimes + 1;
 
                 } else {

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerStatsRecorderImpl.java

@@ -46,7 +46,7 @@ public class ConsumerStatsRecorderImpl implements ConsumerStatsRecorder {
     private static final long serialVersionUID = 1L;
     private TimerTask stat;
     private Timeout statTimeout;
-    private Consumer<?> consumer;
+    private final Consumer<?> consumer;
     private PulsarClientImpl pulsarClient;
     private long oldTime;
     private long statsIntervalSeconds;

pulsar-client/src/main/java/org/apache/pulsar/client/impl/DefaultCryptoKeyReaderBuilder.java

@@ -18,9 +18,7 @@
  */
 package org.apache.pulsar.client.impl;
 
-import java.util.HashMap;
 import java.util.Map;
-
 import org.apache.pulsar.client.impl.conf.DefaultCryptoKeyReaderConfigurationData;
 
 public class DefaultCryptoKeyReaderBuilder implements Cloneable {

pulsar-client/src/main/java/org/apache/pulsar/client/impl/MultiTopicsConsumerImpl.java

@@ -504,16 +504,14 @@ protected CompletableFuture<Void> doReconsumeLater(Message<?> message, AckType a
         }
 
         if (ackType == AckType.Cumulative) {
-            Consumer individualConsumer = consumers.get(topicMessageId.getTopicPartitionName());
+            Consumer<?> individualConsumer = consumers.get(topicMessageId.getTopicPartitionName());
             if (individualConsumer != null) {
-                MessageId innerId = topicMessageId.getInnerMessageId();
                 return individualConsumer.reconsumeLaterCumulativeAsync(message, delayTime, unit);
             } else {
                 return FutureUtil.failedFuture(new PulsarClientException.NotConnectedException());
             }
         } else {
             ConsumerImpl<T> consumer = consumers.get(topicMessageId.getTopicPartitionName());
-            MessageId innerId = topicMessageId.getInnerMessageId();
             return consumer.doReconsumeLater(message, ackType, properties, delayTime, unit)
                      .thenRun(() ->unAckedMessageTracker.remove(topicMessageId));
         }

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ProducerBuilderImpl.java

@@ -342,6 +342,6 @@ private void setMessageRoutingMode() throws PulsarClientException {
 
     @Override
     public String toString() {
-        return conf != null ? conf.toString() : null;
+        return conf != null ? conf.toString() : "";
     }
 }

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ProducerImpl.java

@@ -1129,8 +1129,7 @@ protected boolean verifyLocalBufferIsNotCorrupted(OpSendMsg op) {
             }
             return true;
         } else {
-            log.warn("[{}] Failed while casting {} into ByteBufPair", producerName,
-                    (op.cmd == null ? null : op.cmd.getClass().getName()));
+            log.warn("[{}] Failed while casting empty ByteBufPair, ", producerName);
             return false;
         }
     }

pulsar-client/src/main/java/org/apache/pulsar/client/impl/ProducerStatsRecorderImpl.java

@@ -39,10 +39,10 @@
 public class ProducerStatsRecorderImpl implements ProducerStatsRecorder {
 
     private static final long serialVersionUID = 1L;
-    private TimerTask stat;
-    private Timeout statTimeout;
-    private ProducerImpl<?> producer;
-    private PulsarClientImpl pulsarClient;
+    private transient TimerTask stat;
+    private transient Timeout statTimeout;
+    private transient ProducerImpl<?> producer;
+    private transient PulsarClientImpl pulsarClient;
     private long oldTime;
     private long statsIntervalSeconds;
     private final LongAdder numMsgsSent;
@@ -55,7 +55,7 @@ public class ProducerStatsRecorderImpl implements ProducerStatsRecorder {
     private final LongAdder totalAcksReceived;
     private static final DecimalFormat DEC = new DecimalFormat("0.000");
     private static final DecimalFormat THROUGHPUT_FORMAT = new DecimalFormat("0.00");
-    private final DoublesSketch ds;
+    private transient final DoublesSketch ds;
 
     private volatile double sendMsgsRate;
     private volatile double sendBytesRate;

pulsar-client/src/main/java/org/apache/pulsar/client/impl/TypedMessageBuilderImpl.java

@@ -47,11 +47,11 @@ public class TypedMessageBuilderImpl<T> implements TypedMessageBuilder<T> {
 
     private static final ByteBuffer EMPTY_CONTENT = ByteBuffer.allocate(0);
 
-    private final ProducerBase<?> producer;
-    private final MessageMetadata msgMetadata = new MessageMetadata();
-    private final Schema<T> schema;
-    private ByteBuffer content;
-    private final TransactionImpl txn;
+    private transient final ProducerBase<?> producer;
+    private transient final MessageMetadata msgMetadata = new MessageMetadata();
+    private transient final Schema<T> schema;
+    private transient ByteBuffer content;
+    private transient final TransactionImpl txn;
 
     public TypedMessageBuilderImpl(ProducerBase<?> producer, Schema<T> schema) {
         this(producer, schema, null);

pulsar-client/src/main/java/org/apache/pulsar/client/impl/auth/AuthenticationDataKeyStoreTls.java

@@ -24,7 +24,9 @@
 
 @Slf4j
 public class AuthenticationDataKeyStoreTls implements AuthenticationDataProvider {
-    private final KeyStoreParams keyStoreParams;
+
+    private static final long serialVersionUID = 1L;
+    private transient final KeyStoreParams keyStoreParams;
 
     public AuthenticationDataKeyStoreTls(KeyStoreParams keyStoreParams) throws Exception {
         this.keyStoreParams = keyStoreParams;

pulsar-client/src/main/java/org/apache/pulsar/client/impl/auth/AuthenticationDataTls.java

@@ -33,12 +33,13 @@
 import org.slf4j.LoggerFactory;
 
 public class AuthenticationDataTls implements AuthenticationDataProvider {
+    private static final long serialVersionUID = 1L;
     protected X509Certificate[] tlsCertificates;
     protected PrivateKey tlsPrivateKey;
-    private FileModifiedTimeUpdater certFile, keyFile;
+    private transient FileModifiedTimeUpdater certFile, keyFile;
     // key and cert using stream
-    private InputStream certStream, keyStream;
-    private Supplier<ByteArrayInputStream> certStreamProvider, keyStreamProvider, trustStoreStreamProvider;
+    private transient InputStream certStream, keyStream;
+    private transient Supplier<ByteArrayInputStream> certStreamProvider, keyStreamProvider, trustStoreStreamProvider;
 
     public AuthenticationDataTls(String certFilePath, String keyFilePath) throws KeyManagementException {
         if (certFilePath == null) {

pulsar-client/src/main/java/org/apache/pulsar/client/impl/auth/AuthenticationKeyStoreTls.java

@@ -47,7 +47,7 @@ public class AuthenticationKeyStoreTls implements Authentication, EncodedAuthent
     public final static String KEYSTORE_PW = "keyStorePassword";
     private final static String DEFAULT_KEYSTORE_TYPE = "JKS";
 
-    private KeyStoreParams keyStoreParams;
+    private transient KeyStoreParams keyStoreParams;
 
     public AuthenticationKeyStoreTls() {
     }

pulsar-client/src/main/java/org/apache/pulsar/client/impl/auth/AuthenticationTls.java

@@ -44,7 +44,7 @@ public class AuthenticationTls implements Authentication, EncodedAuthenticationP
 
     private String certFilePath;
     private String keyFilePath;
-    private Supplier<ByteArrayInputStream> certStreamProvider, keyStreamProvider, trustStoreStreamProvider;
+    private transient Supplier<ByteArrayInputStream> certStreamProvider, keyStreamProvider, trustStoreStreamProvider;
 
     public AuthenticationTls() {
     }

pulsar-client/src/main/java/org/apache/pulsar/client/impl/auth/AuthenticationToken.java

@@ -42,7 +42,7 @@
 public class AuthenticationToken implements Authentication, EncodedAuthenticationParameterSupport {
 
     private static final long serialVersionUID = 1L;
-    private transient Supplier<String> tokenSupplier;
+    private transient Supplier<String> tokenSupplier = null;
 
     public AuthenticationToken() {
     }

pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ClientConfigurationData.java

@@ -49,7 +49,7 @@ public class ClientConfigurationData implements Serializable, Cloneable {
     private transient ServiceUrlProvider serviceUrlProvider;
 
     @JsonIgnore
-    private Authentication authentication = AuthenticationDisabled.INSTANCE;
+    private Authentication authentication;
     private String authPluginClassName;
 
     @Secret

pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ConsumerConfigurationData.java

@@ -96,7 +96,7 @@ public class ConsumerConfigurationData<T> implements Serializable, Cloneable {
     private CryptoKeyReader cryptoKeyReader = null;
 
     @JsonIgnore
-    private MessageCrypto messageCrypto = null;
+    private transient MessageCrypto messageCrypto = null;
 
     private ConsumerCryptoFailureAction cryptoFailureAction = ConsumerCryptoFailureAction.FAIL;
 
@@ -110,7 +110,7 @@ public class ConsumerConfigurationData<T> implements Serializable, Cloneable {
 
     private RegexSubscriptionMode regexSubscriptionMode = RegexSubscriptionMode.PersistentOnly;
 
-    private DeadLetterPolicy deadLetterPolicy;
+    private transient DeadLetterPolicy deadLetterPolicy;
 
     private boolean retryEnable = false;
 
@@ -125,7 +125,7 @@ public class ConsumerConfigurationData<T> implements Serializable, Cloneable {
 
     private boolean resetIncludeHead = false;
 
-    private KeySharedPolicy keySharedPolicy;
+    private transient KeySharedPolicy keySharedPolicy;
 
     private boolean batchIndexAckEnabled = false;
 

pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ProducerConfigurationData.java

@@ -84,7 +84,7 @@ public class ProducerConfigurationData implements Serializable, Cloneable {
     private CryptoKeyReader cryptoKeyReader;
 
     @JsonIgnore
-    private MessageCrypto messageCrypto = null;
+    private transient MessageCrypto messageCrypto = null;
 
     @JsonIgnore
     private Set<String> encryptionKeys = new TreeSet<>();

pulsar-client/src/main/java/org/apache/pulsar/client/impl/conf/ReaderConfigurationData.java

@@ -33,6 +33,8 @@
 @Data
 public class ReaderConfigurationData<T> implements Serializable, Cloneable {
 
+    private static final long serialVersionUID = 1L;
+
     private String topicName;
 
     @JsonIgnore
@@ -55,7 +57,7 @@ public class ReaderConfigurationData<T> implements Serializable, Cloneable {
     private boolean readCompacted = false;
     private boolean resetIncludeHead = false;
 
-    private List<Range> keyHashRanges;
+    private transient List<Range> keyHashRanges;
 
     @SuppressWarnings("unchecked")
     public ReaderConfigurationData<T> clone() {

pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/ProtobufNativeSchemaUtils.java

@@ -29,6 +29,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -76,7 +77,8 @@ private static void serializeFileDescriptor(Descriptors.FileDescriptor fileDescr
         if (unResolvedFileDescriptNames.length == 0) {
             fileDescriptorCache.put(fileDescriptor.getFullName(), fileDescriptor.toProto());
         } else {
-            throw new SchemaSerializationException(fileDescriptor.getFullName() + " can't resolve dependency '" + unResolvedFileDescriptNames + "'.");
+            throw new SchemaSerializationException(fileDescriptor.getFullName() + " can't resolve dependency '" +
+                    Arrays.toString(unResolvedFileDescriptNames) + "'.");
         }
     }
 
@@ -96,7 +98,7 @@ public static Descriptors.Descriptor deserialize(byte[] schemaDataBytes) {
             //extract root fileDescriptor
             Descriptors.FileDescriptor fileDescriptor = fileDescriptorCache.get(schemaData.getRootFileDescriptorName());
             //trim package
-            String[] paths = StringUtils.removeFirst(schemaData.getRootMessageTypeName(), fileDescriptor.getPackage()).replaceFirst(".", "").split("\\.");
+            String[] paths = StringUtils.removeFirst(schemaData.getRootMessageTypeName(), fileDescriptor.getPackage()).replaceFirst("\\.", "").split("\\.");
             //extract root message
             descriptor = fileDescriptor.findMessageTypeByName(paths[0]);
             //extract nested message

pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/generic/GenericAvroReader.java

@@ -47,7 +47,7 @@ public class GenericAvroReader implements SchemaReader<GenericRecord> {
     private final List<Field> fields;
     private final Schema schema;
     private final byte[] schemaVersion;
-    private int offset;
+    private final int offset;
 
     public GenericAvroReader(Schema schema) {
         this(null, schema, null);
@@ -66,7 +66,7 @@ public GenericAvroReader(Schema writerSchema, Schema readerSchema, byte[] schema
             this.reader = new GenericDatumReader<>(writerSchema, readerSchema);
         }
         this.byteArrayOutputStream = new ByteArrayOutputStream();
-        this.encoder = EncoderFactory.get().binaryEncoder(this.byteArrayOutputStream, encoder);
+        this.encoder = EncoderFactory.get().binaryEncoder(this.byteArrayOutputStream, null);
 
         if (schema.getObjectProp(GenericAvroSchema.OFFSET_PROP) != null) {
             this.offset = Integer.parseInt(schema.getObjectProp(GenericAvroSchema.OFFSET_PROP).toString());

pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/generic/GenericAvroWriter.java

@@ -37,7 +37,7 @@ public class GenericAvroWriter implements SchemaWriter<GenericRecord> {
     public GenericAvroWriter(Schema schema) {
         this.writer = new GenericDatumWriter<>(schema);
         this.byteArrayOutputStream = new ByteArrayOutputStream();
-        this.encoder = EncoderFactory.get().binaryEncoder(this.byteArrayOutputStream, encoder);
+        this.encoder = EncoderFactory.get().binaryEncoder(this.byteArrayOutputStream, null);
     }
 
     @Override

pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/generic/GenericProtobufNativeReader.java

@@ -36,9 +36,9 @@
 
 public class GenericProtobufNativeReader implements SchemaReader<GenericRecord> {
 
-    private Descriptors.Descriptor descriptor;
-    private byte[] schemaVersion;
-    private List<Field> fields;
+    private final Descriptors.Descriptor descriptor;
+    private final byte[] schemaVersion;
+    private final List<Field> fields;
 
     public GenericProtobufNativeReader(Descriptors.Descriptor descriptor) {
         this(descriptor, null);

pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/generic/GenericProtobufNativeRecord.java

@@ -24,10 +24,10 @@
 
 import java.util.List;
 
-public class GenericProtobufNativeRecord<T extends DynamicMessage> extends VersionedGenericRecord {
+public class GenericProtobufNativeRecord extends VersionedGenericRecord {
 
-    private DynamicMessage record;
-    private Descriptors.Descriptor msgDesc;
+    private final DynamicMessage record;
+    private final Descriptors.Descriptor msgDesc;
 
     protected GenericProtobufNativeRecord(byte[] schemaVersion, Descriptors.Descriptor msgDesc, List<Field> fields, DynamicMessage record) {
         super(schemaVersion, fields);

pulsar-client/src/main/java/org/apache/pulsar/client/impl/schema/writer/AvroWriter.java

@@ -40,7 +40,7 @@ public AvroWriter(Schema schema) {
 
     public AvroWriter(Schema schema, boolean jsr310ConversionEnabled) {
         this.byteArrayOutputStream = new ByteArrayOutputStream();
-        this.encoder = EncoderFactory.get().binaryEncoder(this.byteArrayOutputStream, this.encoder);
+        this.encoder = EncoderFactory.get().binaryEncoder(this.byteArrayOutputStream, null);
         ReflectData reflectData = new ReflectData();
         AvroSchema.addLogicalTypeConversions(reflectData, jsr310ConversionEnabled);
         this.writer = new ReflectDatumWriter<>(schema, reflectData);