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DATAREDIS-890 - Randomize Redis Cluster node order before topology retrieval.

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We now shuffle the set of Redis Cluster nodes before retrieving the topology. This change reduces load on the first node in the known nodes set.

Original pull request: #373.
This commit is contained in:
ChenGuanqun
2018-11-20 21:55:21 +08:00
committed by Mark Paluch
parent dc0ce19cd0
commit 9d47c48e22
2 changed files with 15 additions and 9 deletions
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7
src/main/java/org/springframework/data/redis/connection/jedis/JedisClusterConnection.java
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@@ -24,7 +24,9 @@ import redis.clients.jedis.JedisCluster;
import redis.clients.jedis.JedisClusterConnectionHandler;
import redis.clients.jedis.JedisPool;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
@@ -64,6 +66,7 @@ import org.springframework.util.Assert;
* @author Christoph Strobl
* @author Mark Paluch
* @author Ninad Divadkar
* @author Tao Chen
* @since 1.7
*/
public class JedisClusterConnection implements DefaultedRedisClusterConnection {
@@ -982,7 +985,9 @@ public class JedisClusterConnection implements DefaultedRedisClusterConnection {
Map<String, Exception> errors = new LinkedHashMap<>();
for (Entry<String, JedisPool> entry : cluster.getClusterNodes().entrySet()) {
List<Entry<String, JedisPool>> list = new ArrayList<>(cluster.getClusterNodes().entrySet());
Collections.shuffle(list);
for (Entry<String, JedisPool> entry : list) {
Jedis jedis = null;