m-trieu commented on code in PR #31317:
URL: https://github.com/apache/beam/pull/31317#discussion_r1621735136


##########
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/StreamingModeExecutionContext.java:
##########
@@ -83,19 +87,30 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-/** {@link DataflowExecutionContext} for use in streaming mode. */
+/**
+ * {@link DataflowExecutionContext} for use in streaming mode. Contains cached 
readers and Beam
+ * state pertaining to a processing its owning computation. Can be reused 
across processing
+ * different WorkItems for the same computation.
+ */
 @SuppressWarnings({
   "nullness" // TODO(https://github.com/apache/beam/issues/20497)

Review Comment:
   there are quite a bit of nullability issues not just with work nullability 
   
   added a comment to deal with this a follow up PR



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