From 6ce22f02f7010df0de40195335d2d2dbb3d7b10d Mon Sep 17 00:00:00 2001
From: leventov <leventov@ya.ru>
Date: Sun, 5 Oct 2014 05:58:39 +0400
Subject: [PATCH] Throw IllegalArgumentException with human-readable message in
 VanillaChronicleMap.Segment.alloc() method on attempt of allocation of more
 than 64 blocks

---
 .../java/net/openhft/chronicle/map/VanillaChronicleMap.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java b/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
index 3c494cfcc..c35bad84f 100644
--- a/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
+++ b/src/main/java/net/openhft/chronicle/map/VanillaChronicleMap.java
@@ -897,6 +897,9 @@ class VanillaChronicleMap<K, KI, MKI extends MetaBytesInterop<K, KI>,
         }
 
         int alloc(int blocks) {
+            if (blocks > MAX_ENTRY_OVERSIZE_FACTOR)
+                throw new IllegalArgumentException("Entry is too large: requires " + blocks +
+                        " entry size chucks, " + MAX_ENTRY_OVERSIZE_FACTOR + " is maximum.");
             int ret = (int) freeList.setNextNContinuousClearBits(nextPosToSearchFrom,
                     blocks);
             if (ret == DirectBitSet.NOT_FOUND) {