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

commit 9eb8beb90f54b33da2287725abb7bde60e05f36a
Author: Timo Walther <twal...@apache.org>
AuthorDate: Fri Oct 16 16:40:33 2020 +0200

    [FLINK-19672][connector-kafka] Merge internal and internals package
---
 .../flink/streaming/connectors/kafka/FlinkKafkaConsumer.java      | 4 ++--
 .../flink/streaming/connectors/kafka/FlinkKafkaProducer.java      | 6 +++---
 .../kafka/{internal => internals}/FlinkKafkaInternalProducer.java | 2 +-
 .../connectors/kafka/{internal => internals}/Handover.java        | 2 +-
 .../kafka/{internal => internals}/KafkaConsumerThread.java        | 6 +-----
 .../connectors/kafka/{internal => internals}/KafkaFetcher.java    | 6 +-----
 .../kafka/{internal => internals}/KafkaPartitionDiscoverer.java   | 5 +----
 .../kafka/{internal => internals}/KafkaShuffleFetcher.java        | 4 +---
 .../kafka/{internal => internals}/TransactionalIdsGenerator.java  | 2 +-
 .../metrics/KafkaMetricMutableWrapper.java                        | 2 +-
 .../connectors/kafka/shuffle/FlinkKafkaShuffleConsumer.java       | 2 +-
 .../connectors/kafka/FlinkKafkaInternalProducerITCase.java        | 2 +-
 .../streaming/connectors/kafka/KafkaSerializerUpgradeTest.java    | 2 +-
 .../streaming/connectors/kafka/shuffle/KafkaShuffleITCase.java    | 8 ++++----
 14 files changed, 20 insertions(+), 33 deletions(-)

diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumer.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumer.java
index 6e3642a..c9ed8e5 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumer.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumer.java
@@ -23,11 +23,11 @@ import 
org.apache.flink.api.common.serialization.DeserializationSchema;
 import org.apache.flink.metrics.MetricGroup;
 import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
 import org.apache.flink.streaming.connectors.kafka.config.OffsetCommitMode;
-import org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher;
-import 
org.apache.flink.streaming.connectors.kafka.internal.KafkaPartitionDiscoverer;
 import org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher;
 import 
org.apache.flink.streaming.connectors.kafka.internals.AbstractPartitionDiscoverer;
 import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaDeserializationSchemaWrapper;
+import org.apache.flink.streaming.connectors.kafka.internals.KafkaFetcher;
+import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaPartitionDiscoverer;
 import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
 import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicsDescriptor;
 import org.apache.flink.util.PropertiesUtil;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer.java
index 1c7d9a8..0d3a62a 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaProducer.java
@@ -39,10 +39,10 @@ import 
org.apache.flink.runtime.state.FunctionInitializationContext;
 import org.apache.flink.runtime.state.FunctionSnapshotContext;
 import 
org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunction;
 import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
-import 
org.apache.flink.streaming.connectors.kafka.internal.FlinkKafkaInternalProducer;
-import 
org.apache.flink.streaming.connectors.kafka.internal.TransactionalIdsGenerator;
-import 
org.apache.flink.streaming.connectors.kafka.internal.metrics.KafkaMetricMutableWrapper;
+import 
org.apache.flink.streaming.connectors.kafka.internals.FlinkKafkaInternalProducer;
 import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaSerializationSchemaWrapper;
+import 
org.apache.flink.streaming.connectors.kafka.internals.TransactionalIdsGenerator;
+import 
org.apache.flink.streaming.connectors.kafka.internals.metrics.KafkaMetricMutableWrapper;
 import 
org.apache.flink.streaming.connectors.kafka.partitioner.FlinkFixedPartitioner;
 import 
org.apache.flink.streaming.connectors.kafka.partitioner.FlinkKafkaPartitioner;
 import org.apache.flink.streaming.util.serialization.KeyedSerializationSchema;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/FlinkKafkaInternalProducer.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/FlinkKafkaInternalProducer.java
similarity index 99%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/FlinkKafkaInternalProducer.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/FlinkKafkaInternalProducer.java
index fef3deb..a36ba58 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/FlinkKafkaInternalProducer.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/FlinkKafkaInternalProducer.java
@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal;
+package org.apache.flink.streaming.connectors.kafka.internals;
 
 import org.apache.flink.annotation.PublicEvolving;
 import org.apache.flink.annotation.VisibleForTesting;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/Handover.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/Handover.java
similarity index 99%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/Handover.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/Handover.java
index 02cbd92..cec9304 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/Handover.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/Handover.java
@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal;
+package org.apache.flink.streaming.connectors.kafka.internals;
 
 import org.apache.flink.annotation.Internal;
 import org.apache.flink.util.ExceptionUtils;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaConsumerThread.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaConsumerThread.java
similarity index 97%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaConsumerThread.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaConsumerThread.java
index 51bec0d..31d7d21 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaConsumerThread.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaConsumerThread.java
@@ -16,16 +16,12 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal;
+package org.apache.flink.streaming.connectors.kafka.internals;
 
 import org.apache.flink.annotation.Internal;
 import org.apache.flink.annotation.VisibleForTesting;
 import org.apache.flink.api.java.tuple.Tuple2;
 import org.apache.flink.metrics.MetricGroup;
-import 
org.apache.flink.streaming.connectors.kafka.internals.ClosableBlockingQueue;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaCommitCallback;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionState;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionStateSentinel;
 import 
org.apache.flink.streaming.connectors.kafka.internals.metrics.KafkaMetricWrapper;
 
 import org.apache.kafka.clients.consumer.ConsumerRecords;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaFetcher.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaFetcher.java
similarity index 95%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaFetcher.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaFetcher.java
index d2be85e..003bcc8 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaFetcher.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaFetcher.java
@@ -15,17 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal;
+package org.apache.flink.streaming.connectors.kafka.internals;
 
 import org.apache.flink.annotation.Internal;
 import org.apache.flink.api.common.eventtime.WatermarkStrategy;
 import org.apache.flink.metrics.MetricGroup;
 import org.apache.flink.streaming.api.functions.source.SourceFunction;
 import org.apache.flink.streaming.connectors.kafka.KafkaDeserializationSchema;
-import org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaCommitCallback;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionState;
 import org.apache.flink.streaming.runtime.tasks.ProcessingTimeService;
 import org.apache.flink.util.Collector;
 import org.apache.flink.util.SerializedValue;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaPartitionDiscoverer.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaPartitionDiscoverer.java
similarity index 91%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaPartitionDiscoverer.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaPartitionDiscoverer.java
index 25f8479..ba0c951 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaPartitionDiscoverer.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaPartitionDiscoverer.java
@@ -15,12 +15,9 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal;
+package org.apache.flink.streaming.connectors.kafka.internals;
 
 import org.apache.flink.annotation.Internal;
-import 
org.apache.flink.streaming.connectors.kafka.internals.AbstractPartitionDiscoverer;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicsDescriptor;
 
 import org.apache.kafka.clients.consumer.KafkaConsumer;
 import org.apache.kafka.common.PartitionInfo;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaShuffleFetcher.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaShuffleFetcher.java
similarity index 97%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaShuffleFetcher.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaShuffleFetcher.java
index 5d380da..fc343e6 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/KafkaShuffleFetcher.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/KafkaShuffleFetcher.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal;
+package org.apache.flink.streaming.connectors.kafka.internals;
 
 import org.apache.flink.annotation.Internal;
 import org.apache.flink.annotation.VisibleForTesting;
@@ -29,8 +29,6 @@ import org.apache.flink.metrics.MetricGroup;
 import org.apache.flink.streaming.api.functions.source.SourceFunction;
 import org.apache.flink.streaming.api.watermark.Watermark;
 import org.apache.flink.streaming.connectors.kafka.KafkaDeserializationSchema;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
-import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionState;
 import org.apache.flink.streaming.runtime.tasks.ProcessingTimeService;
 import org.apache.flink.util.Preconditions;
 import org.apache.flink.util.SerializedValue;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/TransactionalIdsGenerator.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/TransactionalIdsGenerator.java
similarity index 98%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/TransactionalIdsGenerator.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/TransactionalIdsGenerator.java
index 29e8524..4c33d2b 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/TransactionalIdsGenerator.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/TransactionalIdsGenerator.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal;
+package org.apache.flink.streaming.connectors.kafka.internals;
 
 import org.apache.flink.annotation.Internal;
 
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/metrics/KafkaMetricMutableWrapper.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/metrics/KafkaMetricMutableWrapper.java
similarity index 94%
rename from 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/metrics/KafkaMetricMutableWrapper.java
rename to 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/metrics/KafkaMetricMutableWrapper.java
index 39f4df2..9ffcd9f 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/metrics/KafkaMetricMutableWrapper.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/metrics/KafkaMetricMutableWrapper.java
@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-package org.apache.flink.streaming.connectors.kafka.internal.metrics;
+package org.apache.flink.streaming.connectors.kafka.internals.metrics;
 
 import org.apache.flink.annotation.Internal;
 import org.apache.flink.metrics.Gauge;
diff --git 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/shuffle/FlinkKafkaShuffleConsumer.java
 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/shuffle/FlinkKafkaShuffleConsumer.java
index 6403f42..5da1c1f 100644
--- 
a/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/shuffle/FlinkKafkaShuffleConsumer.java
+++ 
b/flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/streaming/connectors/kafka/shuffle/FlinkKafkaShuffleConsumer.java
@@ -25,8 +25,8 @@ import org.apache.flink.metrics.MetricGroup;
 import org.apache.flink.streaming.api.operators.StreamingRuntimeContext;
 import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
 import org.apache.flink.streaming.connectors.kafka.config.OffsetCommitMode;
-import 
org.apache.flink.streaming.connectors.kafka.internal.KafkaShuffleFetcher;
 import org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher;
+import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaShuffleFetcher;
 import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartition;
 import org.apache.flink.util.Preconditions;
 import org.apache.flink.util.PropertiesUtil;
diff --git 
a/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaInternalProducerITCase.java
 
b/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaInternalProducerITCase.java
index 53fb781..0a64097 100644
--- 
a/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaInternalProducerITCase.java
+++ 
b/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaInternalProducerITCase.java
@@ -18,7 +18,7 @@
 
 package org.apache.flink.streaming.connectors.kafka;
 
-import 
org.apache.flink.streaming.connectors.kafka.internal.FlinkKafkaInternalProducer;
+import 
org.apache.flink.streaming.connectors.kafka.internals.FlinkKafkaInternalProducer;
 
 import org.apache.flink.shaded.guava18.com.google.common.collect.Iterables;
 
diff --git 
a/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/KafkaSerializerUpgradeTest.java
 
b/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/KafkaSerializerUpgradeTest.java
index bb1146f..b56eee4 100644
--- 
a/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/KafkaSerializerUpgradeTest.java
+++ 
b/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/KafkaSerializerUpgradeTest.java
@@ -22,7 +22,7 @@ import org.apache.flink.api.common.typeutils.TypeSerializer;
 import org.apache.flink.api.common.typeutils.TypeSerializerMatchers;
 import org.apache.flink.api.common.typeutils.TypeSerializerSchemaCompatibility;
 import org.apache.flink.api.common.typeutils.TypeSerializerUpgradeTestBase;
-import 
org.apache.flink.streaming.connectors.kafka.internal.FlinkKafkaInternalProducer;
+import 
org.apache.flink.streaming.connectors.kafka.internals.FlinkKafkaInternalProducer;
 import org.apache.flink.testutils.migration.MigrationVersion;
 
 import org.hamcrest.Matcher;
diff --git 
a/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/shuffle/KafkaShuffleITCase.java
 
b/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/shuffle/KafkaShuffleITCase.java
index 805f7ef..2ea388f 100644
--- 
a/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/shuffle/KafkaShuffleITCase.java
+++ 
b/flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/shuffle/KafkaShuffleITCase.java
@@ -28,10 +28,10 @@ import org.apache.flink.streaming.api.datastream.DataStream;
 import org.apache.flink.streaming.api.datastream.KeyedStream;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
 import org.apache.flink.streaming.api.watermark.Watermark;
-import 
org.apache.flink.streaming.connectors.kafka.internal.KafkaShuffleFetcher.KafkaShuffleElement;
-import 
org.apache.flink.streaming.connectors.kafka.internal.KafkaShuffleFetcher.KafkaShuffleElementDeserializer;
-import 
org.apache.flink.streaming.connectors.kafka.internal.KafkaShuffleFetcher.KafkaShuffleRecord;
-import 
org.apache.flink.streaming.connectors.kafka.internal.KafkaShuffleFetcher.KafkaShuffleWatermark;
+import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaShuffleFetcher.KafkaShuffleElement;
+import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaShuffleFetcher.KafkaShuffleElementDeserializer;
+import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaShuffleFetcher.KafkaShuffleRecord;
+import 
org.apache.flink.streaming.connectors.kafka.internals.KafkaShuffleFetcher.KafkaShuffleWatermark;
 import org.apache.flink.util.PropertiesUtil;
 
 import org.apache.flink.shaded.guava18.com.google.common.collect.ImmutableMap;

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