diff --git a/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java b/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java
index 877022e..b55ce49 100644
--- a/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java
+++ b/java/com/google/gerrit/server/notedb/ChangeDraftUpdate.java
@@ -205,7 +205,6 @@
 
     Map<ObjectId, RevisionNoteBuilder> builders = cache.getBuilders();
     boolean touchedAnyRevs = false;
-    boolean hasComments = false;
     for (Map.Entry<ObjectId, RevisionNoteBuilder> e : builders.entrySet()) {
       updatedCommits.add(e.getKey());
       ObjectId id = e.getKey();
@@ -216,7 +215,6 @@
       if (data.length == 0) {
         rnm.noteMap.remove(id);
       } else {
-        hasComments = true;
         ObjectId dataBlob = ins.insert(OBJ_BLOB, data);
         rnm.noteMap.set(id, dataBlob);
       }
@@ -229,10 +227,9 @@
       return NO_OP_UPDATE;
     }
 
-    // If we touched every revision and there are no comments left, tell the
+    // If there are no comments left, tell the
     // caller to delete the entire ref.
-    boolean touchedAllRevs = updatedCommits.equals(rnm.revisionNotes.keySet());
-    if (touchedAllRevs && !hasComments) {
+    if (!rnm.noteMap.iterator().hasNext()) {
       return null;
     }
 
diff --git a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
index d3a0cb4..b1194b1 100644
--- a/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
+++ b/javatests/com/google/gerrit/acceptance/server/change/CommentsIT.java
@@ -32,6 +32,7 @@
 import com.google.gerrit.acceptance.testsuite.request.RequestScopeOperations;
 import com.google.gerrit.entities.Change;
 import com.google.gerrit.entities.Patch;
+import com.google.gerrit.entities.RefNames;
 import com.google.gerrit.extensions.api.changes.DeleteCommentInput;
 import com.google.gerrit.extensions.api.changes.DraftInput;
 import com.google.gerrit.extensions.api.changes.ReviewInput;
@@ -68,6 +69,7 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.eclipse.jgit.lib.ObjectReader;
+import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.notes.NoteMap;
 import org.eclipse.jgit.revwalk.RevCommit;
@@ -314,6 +316,45 @@
   }
 
   @Test
+  public void postCommentsUnreachableData() throws Exception {
+    String file = "file";
+    PushOneCommit push =
+        pushFactory.create(admin.newIdent(), testRepo, "first subject", file, "l1\nl2\n");
+
+    String dest = "refs/for/master";
+    PushOneCommit.Result r1 = push.to(dest);
+    r1.assertOkStatus();
+    String changeId = r1.getChangeId();
+    String revId = r1.getCommit().getName();
+
+    PushOneCommit.Result r2 = amendChange(r1.getChangeId());
+    r2.assertOkStatus();
+
+    String draftRefName = RefNames.refsDraftComments(r1.getChange().getId(), admin.id());
+
+    DraftInput draft = newDraft(file, Side.REVISION, 1, "comment");
+    addDraft(changeId, "1", draft);
+    ReviewInput reviewInput = new ReviewInput();
+    reviewInput.drafts = DraftHandling.PUBLISH;
+    reviewInput.message = "foo";
+    gApi.changes().id(r1.getChangeId()).revision(1).review(reviewInput);
+
+    addDraft(changeId, "2", newDraft(file, Side.REVISION, 2, "comment2"));
+    reviewInput = new ReviewInput();
+    reviewInput.drafts = DraftHandling.PUBLISH_ALL_REVISIONS;
+    reviewInput.message = "bar";
+    gApi.changes().id(r1.getChangeId()).revision(2).review(reviewInput);
+
+    Map<String, List<CommentInfo>> drafts = getDraftComments(changeId, revId);
+    assertThat(drafts.isEmpty()).isTrue();
+
+    try (Repository repo = repoManager.openRepository(allUsers)) {
+      Ref ref = repo.exactRef(draftRefName);
+      assertThat(ref).isNull();
+    }
+  }
+
+  @Test
   public void listComments() throws Exception {
     String file = "file";
     PushOneCommit push =
diff --git a/tools/nongoogle.bzl b/tools/nongoogle.bzl
index 1112c50..eb1372a 100644
--- a/tools/nongoogle.bzl
+++ b/tools/nongoogle.bzl
@@ -170,18 +170,18 @@
         sha1 = "3e83394258ae2089be7219b971ec21a8288528ad",
     )
 
-    TESTCONTAINERS_VERSION = "1.12.3"
+    TESTCONTAINERS_VERSION = "1.12.4"
 
     maven_jar(
         name = "testcontainers",
         artifact = "org.testcontainers:testcontainers:" + TESTCONTAINERS_VERSION,
-        sha1 = "e424a4549640e120acceac641ac909fcda58bf62",
+        sha1 = "456b6facac12c4b67130d9056a43c011679e9f0c",
     )
 
     maven_jar(
         name = "testcontainers-elasticsearch",
         artifact = "org.testcontainers:elasticsearch:" + TESTCONTAINERS_VERSION,
-        sha1 = "c0796de5032070b8768ce78c78949b48f13c30db",
+        sha1 = "9e210c277a35a95a76d03a79e2812575bd07391c",
     )
 
     maven_jar(