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Change trappy float comparison #31889

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Jul 10, 2018
Merged

Change trappy float comparison #31889

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2 changes: 1 addition & 1 deletion .../java/org/elasticsearch/cluster/routing/allocation/allocator/BalancedShardsAllocator.java
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Original file line number Diff line number Diff line change
Expand Up @@ -1009,7 +1009,7 @@ private boolean tryRelocateShard(ModelNode minNode, ModelNode maxNode, String id
// simulate moving shard from maxNode to minNode
final float delta = weight.weightShardAdded(this, minNode, idx) - weight.weightShardRemoved(this, maxNode, idx);
if (delta < minCost ||
(candidate != null && delta == minCost && candidate.id() > shard.id())) {
(candidate != null && Float.compare(delta, minCost) == 0 && candidate.id() > shard.id())) {
/* this last line is a tie-breaker to make the shard allocation alg deterministic
* otherwise we rely on the iteration order of the index.getAllShards() which is a set.*/
minCost = delta;
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