From 8fcb620d95e913d58a8bf072be8b8a7f6630497e Mon Sep 17 00:00:00 2001
From: Stefania Alborghetti <stefania.alborghetti@datastax.com>
Date: Tue, 2 Jun 2015 16:42:50 +0200
Subject: [PATCH] Partial backport of CASSANDRA-8739 - avoid LCS overlap in L1

Patch by Stefania Alborghetti; reviewed by marcuse for CASSANDRA-8656
---
 .../org/apache/cassandra/db/compaction/LeveledManifest.java     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/java/org/apache/cassandra/db/compaction/LeveledManifest.java b/src/java/org/apache/cassandra/db/compaction/LeveledManifest.java
index 81c65e490e..783912177d 100644
--- a/src/java/org/apache/cassandra/db/compaction/LeveledManifest.java
+++ b/src/java/org/apache/cassandra/db/compaction/LeveledManifest.java
@@ -547,6 +547,8 @@ public class LeveledManifest
                 Set<SSTableReader> l1overlapping = overlapping(candidates, generations[1]);
                 if (Sets.intersection(l1overlapping, compacting).size() > 0)
                     return Collections.emptyList();
+                if (!overlapping(candidates, compactingL0).isEmpty())
+                    return Collections.emptyList();
                 candidates = Sets.union(candidates, l1overlapping);
             }
             if (candidates.size() < 2)