Jedis Cluster common problems jedisclusterexception:clusterdown the cluster is down

The error is shown below and no reason has been found so far. Ask the great God to help answer, what is the cause of the error, what is the solution.

Redis.clients.jedis.exceptions.hk.JedisClusterException:CLUSTERDOWN the cluster is down at Redis.clients.jedis.hk.Protocol.processError (protocol.java:118) at Redis.clients.jedis.hk.Protocol.process ( protocol.java:138) at Redis.clients.jedis.hk.Protocol.read (protocol.java:207) at Redis.clients.jedis.hk.Connection.readProtocolWithCheckingBroken (connection.java:285) at Redis.clients.jedis.hk.Connection.getIntegerReply (connection.java:210) at Redis.clients.jedis.hk.Jedis.hset ( jedis.java:664) at Redis.clients.jedis.hk.jediscluster$24.execute (jediscluster.java:306) at Redis.clients.jedis.hk.jediscluster$24.execute (jediscluster.java:303) at Redis.clients.jedis.hk.JedisClusterCommand.runWithRetries (jedisclustercommand.java:60) at Redis.clients.jedis.hk.JedisClusterCommand.runWithRetries (jedisclustercommand.java:71) at Redis.clients.jedis.hk.JedisClusterCommand.runWithRetries (jedisclustercommand.java:86) at Redis.clients.jedis.hk.JedisClusterCommand.runWithRetries (jedisclustercommand.java:71) AT Redis.clients.jedis.hk.JedisClusterCommand.run (jedisclustercommand.java:32) at Redis.clients.jedis.hk.JedisCluster.hset (jediscluster.java:302) at Com.iclick.shard.CommonProgram.commonProgram ( commonprogram.java:57) at Com.iclick.shard.ShardProgram0.run (shardprogram0.java:43) at Java.lang.Thread.run ( thread.java:745) Redis.clients.jedis.exceptions.hk.JedisClusterException:CLUSTERDOWN The cluster is down at Redis.clients.jedis.hk.Protocol.processError (protocol.java:118) at Redis.clients.jedis.hk.Protocol.process ( protocol.java:138) at Redis.clients.jedis.hk.Protocol.read (protocol.java:207) at Redis.clients.jedis.hk.Connection.readProtocolWithCheckingBroken (connection.java:285) at Redis.clients.jedis.hk.Connection.getIntegerReply (connection.java:210) at Redis.clients.jedis.hk.Jedis.hset ( jedis.java:664) at Redis.clients.jedis.hk.jediscluster$24.execute (jediscluster.java:306) at Redis.clients.jedis.hk.jediscluster$24.execute (jediscluster.java:303) at Redis.clients.jedis.hk.JedisClusterCommaNd.runwithretries (jedisclustercommand.java:60) at Redis.clients.jedis.hk.JedisClusterCommand.runWithRetries ( jedisclustercommand.java:71) at Redis.clients.jedis.hk.JedisClusterCommand.runWithRetries ( jedisclustercommand.java:86) at Redis.clients.jedis.hk.JedisClusterCommand.runWithRetries ( jedisclustercommand.java:71) at Redis.clients.jedis.hk.JedisClusterCommand.run (jedisclustercommand.java:32) at Redis.clients.jedis.hk.JedisCluster.hset (jediscluster.java:302) at Com.iclick.shard.CommonProgram.commonProgram ( commonprogram.java:57) at Com.iclick.shard.ShardProgram0.run (shardprogram0.java:43) at Java.lang.Thread.run ( thread.java:745) Redis.clients.jedis.exceptions.hk.JedisClusterException:CLUSTERDOWN The cluster is down at Redis.clients.jedis.hk.Protocol.processError (protocol.java:118) at Redis.clients.jedis.hk.Protocol.process ( protocol.java:138) at Redis.clients.jedis.hk.Protocol.read (protocol.java:207) at 

The code is as follows:

Public staticvoid Main (String[]args) {

Filecount.splitfile (10);

set

Set.add (New Hostandport ("127.0.0.1", 7000));

Set.add (New Hostandport ("127.0.0.1", 7001));

Set.add (New Hostandport ("127.0.0.1", 7002));

Set.add (New Hostandport ("127.0.0.1", 7003));

Set.add (New Hostandport ("127.0.0.1", 7004));

Set.add (New Hostandport ("127.0.0.1", 7005));

Jediscluster Jedis =new jediscluster (set, 5000, 1000);

BufferedReader Reader =null;

try {

for (intcount_i = 0;count_i < 10;count_i++) {

String fileName = file.separator + "Users" + file.separator

+ "Lishangrong" + file.separator + "XMO"

+ File.separator + "20150525_" +count_i;

File file =new file (fileName);

reader = new BufferedReader (new FileReader (file));

String tempstring =null;

Jsonobject JSON;

List<string> label;

List<string> gender;

List<string> age;

Read one line at a time, the file ends when you read null

while ((TempString =reader.readline ())!=null) {

JSON = new Jsonobject ();

label = new Arraylist<string> ();

gender = new Arraylist<string> ();

Age = new arraylist<string> ();

Show the current line number

String[] Split =tempstring.split ("\\s");

String Cookie =split[0];

if (!split[1].split (",") [0].equals ("N")) {

String[] lsbellist =split[1].split (",");

for (inti = 0;i <lsbellist.length;i++) {

Label.

Label.add (Lsbellist[i]);

}

}

Gender

if (!split[2].equals ("N")) {

Gender.add (split[2]);

}

Age

if (!split[3].equals ("N")) {

Age.add (Split[3]);

}

Json.put ("label", label);

Json.put ("Gender", gender);

Json.put (' age ', age);

String jsonstr =json.tostring ();

Jedis.hset ("Group_" +cookie, "features", JSONSTR);

}

JSON = NULL;

label = NULL;

gender = null;

age = null;

File.delete ();

}

Long L2 = System.currenttimemillis ();

System.out.println (L2-L1);

} catch (Exceptione) {

E.printstacktrace (PW);

Mailsend.mail_send (Sw.tostring ());

finally {

if (reader!=null) {

try {

Reader.close ();

} catch (IOExceptione1) {

}

}

}

}