diff --git a/runners/flink/src/main/java/org/apache/beam/runners/flink/FlinkBatchPortablePipelineTranslator.java b/runners/flink/src/main/java/org/apache/beam/runners/flink/FlinkBatchPortablePipelineTranslator.java
index 4d9a5a516c75..19c943b67747 100644
--- a/runners/flink/src/main/java/org/apache/beam/runners/flink/FlinkBatchPortablePipelineTranslator.java
+++ b/runners/flink/src/main/java/org/apache/beam/runners/flink/FlinkBatchPortablePipelineTranslator.java
@@ -46,6 +46,7 @@
 import org.apache.beam.runners.flink.translation.functions.FlinkReduceFunction;
 import org.apache.beam.runners.flink.translation.types.CoderTypeInformation;
 import org.apache.beam.runners.flink.translation.types.KvKeySelector;
+import org.apache.beam.runners.flink.translation.utils.LargeRecordFilterFunction;
 import org.apache.beam.runners.flink.translation.wrappers.ImpulseInputFormat;
 import org.apache.beam.runners.fnexecution.provisioning.JobInfo;
 import org.apache.beam.runners.fnexecution.wire.WireCoders;
@@ -92,6 +93,8 @@
 import org.apache.flink.api.java.operators.SingleInputUdfOperator;
 import org.apache.flink.api.java.operators.UnsortedGrouping;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * A translator that translates bounded portable pipelines into executable Flink pipelines.
@@ -119,6 +122,8 @@
 public class FlinkBatchPortablePipelineTranslator
     implements FlinkPortablePipelineTranslator<
         FlinkBatchPortablePipelineTranslator.BatchTranslationContext> {
+  private static final Logger LOG =
+      LoggerFactory.getLogger(FlinkBatchPortablePipelineTranslator.class);
 
   /**
    * Creates a batch translation context. The resulting Flink execution dag will live in a new
@@ -206,6 +211,7 @@ public FlinkPipelineOptions getPipelineOptions() {
 
     @Override
     public JobExecutionResult execute(String jobName) throws Exception {
+      LOG.info("Executing Flink batch job with name: {}", jobName);
       return getExecutionEnvironment().execute(jobName);
     }
 
@@ -515,8 +521,14 @@ private static <K, V> void translateGroupByKey(
     TypeInformation<WindowedValue<KV<K, List<V>>>> partialReduceTypeInfo =
         new CoderTypeInformation<>(outputCoder, context.getPipelineOptions());
 
+    ///////////////////////// BEGIN GLEAN MODIFICATION ///////////////////////////////
+    LOG.info("Add step to filter large records before GroupBy");
+    DataSet<WindowedValue<KV<K, V>>> filteredDataSet =
+        inputDataSet.filter(new LargeRecordFilterFunction<>());
+
     Grouping<WindowedValue<KV<K, V>>> inputGrouping =
-        inputDataSet.groupBy(new KvKeySelector<>(inputElementCoder.getKeyCoder()));
+        filteredDataSet.groupBy(new KvKeySelector<>(inputElementCoder.getKeyCoder()));
+    ///////////////////////// END GLEAN MODIFICATION /////////////////////////////////
 
     FlinkPartialReduceFunction<K, V, List<V>, ?> partialReduceFunction =
         new FlinkPartialReduceFunction<>(
diff --git a/runners/flink/src/main/java/org/apache/beam/runners/flink/translation/utils/LargeRecordFilterFunction.java b/runners/flink/src/main/java/org/apache/beam/runners/flink/translation/utils/LargeRecordFilterFunction.java
new file mode 100644
index 000000000000..01fd2f831bbd
--- /dev/null
+++ b/runners/flink/src/main/java/org/apache/beam/runners/flink/translation/utils/LargeRecordFilterFunction.java
@@ -0,0 +1,45 @@
+package org.apache.beam.runners.flink.translation.utils;
+
+import java.util.List;
+import org.apache.beam.runners.flink.FlinkBatchPortablePipelineTranslator;
+import org.apache.beam.sdk.util.WindowedValue;
+import org.apache.beam.sdk.values.KV;
+import org.apache.flink.api.common.functions.FilterFunction;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * [Glean]
+ * FilterFunction that filters out large records based on a size threshold.
+ */
+public class LargeRecordFilterFunction<K, V> implements
+    FilterFunction<WindowedValue<KV<K, V>>> {
+  private static final Logger LOG =
+      LoggerFactory.getLogger(LargeRecordFilterFunction.class);
+  private static final long MAX_RECORD_SIZE =  5000000; // 5 MB
+
+  @Override
+  public boolean filter(WindowedValue<KV<K, V>> windowedValue) throws Exception {
+    KV<K, V> kv = windowedValue.getValue();
+    long size = getObjectSize(kv.getKey()) + getObjectSize(kv.getValue());
+    if (size >= MAX_RECORD_SIZE) {
+      LOG.warn("Dropping large record with size: {}", size);
+      return false;
+    }
+    return true;
+  }
+
+  /**
+   * Calculate the size of an object in bytes.
+   * This is a simplified version for objects used in portability.
+   */
+  private static <T> long getObjectSize(T o) {
+    if (o instanceof byte[]) {
+      return ((byte[]) o).length;
+    } else if(o instanceof List) {
+      return ((List<?>) o).stream().mapToLong(LargeRecordFilterFunction::getObjectSize).sum();
+    } else {
+      return 0; // for other types, we don't calculate size
+    }
+  }
+}