fix: Make change stream unknown mod error more actionable (#1938)

jackdingilian · igorbernstein2 · gcf-owl-bot[bot] · web-flow · commit e7ba045967e8 · 2024-06-10T11:19:11.000-04:00
* fix: Make change stream unknown mod error more actionable * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md --------- Co-authored-by: Igor Bernstein <igorbernstein@google.com> Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
diff --git a/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/changestream/ChangeStreamStateMachine.java b/google-cloud-bigtable/src/main/java/com/google/cloud/bigtable/data/v2/stub/changestream/ChangeStreamStateMachine.java
@@ -486,7 +486,8 @@ State handleDataChange(ReadChangeStreamResponse.DataChange dataChange) {
                   Value.fromProto(mod.getAddToCell().getTimestamp()),
                   Value.fromProto(mod.getAddToCell().getInput()));
             }
-            throw new IllegalStateException("AWAITING_NEW_DATA_CHANGE: Unexpected mod type");
+            throw new IllegalStateException(
+                "Received unknown mod type. You may need to upgrade your Bigtable client.");
           }
 
           // After adding all mods from this DataChange to the state machine, finish the current
