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[BEAM-2703] Fix min_timestamp used for KafkaIO watermark. #3758

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[BEAM-2703] Fix min_timestamp used for KafkaIO watermark. #3758

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3 changes: 2 additions & 1 deletion sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaIO.java
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Original file line number Diff line number Diff line change
Expand Up @@ -82,6 +82,7 @@
import org.apache.beam.sdk.transforms.SerializableFunction;
import org.apache.beam.sdk.transforms.SimpleFunction;
import org.apache.beam.sdk.transforms.display.DisplayData;
import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PBegin;
import org.apache.beam.sdk.values.PCollection;
Expand Down Expand Up @@ -899,7 +900,7 @@ private static class UnboundedKafkaReader<K, V> extends UnboundedReader<KafkaRec
private transient ConsumerSpEL consumerSpEL;

/** watermark before any records have been read. */
private static Instant initialWatermark = new Instant(Long.MIN_VALUE);
private static Instant initialWatermark = BoundedWindow.TIMESTAMP_MIN_VALUE;

@Override
public String toString() {
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