From 0a96435669b0cb837cf5f3f26f54520772a5de16 Mon Sep 17 00:00:00 2001
From: Kenneth Endfinger <kaendfinger@gmail.com>
Date: Sat, 8 Jan 2022 15:28:41 -0500
Subject: [PATCH] Gjallarhorn: Render pool should ignore playback segments
 which are empty.

---
 .../kubelet/foundation/gjallarhorn/state/BlockMapRenderPool.kt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapRenderPool.kt b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapRenderPool.kt
index 83bcf8f..d26c9fa 100644
--- a/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapRenderPool.kt
+++ b/tool-gjallarhorn/src/main/kotlin/cloud/kubelet/foundation/gjallarhorn/state/BlockMapRenderPool.kt
@@ -59,6 +59,9 @@ class BlockMapRenderPool<T>(
     val sliced = changelog.slice(slice)
     val tracker = BlockLogTracker(blockTrackMode)
     tracker.replay(sliced)
+    if (tracker.isEmpty()) {
+      return
+    }
     trackers[slice] = tracker
   }