#7341·redisson

Unable to init enough connections amount! Only 4 of 5 were initialized

Author: ferozedCreated Sep 2, 2026Updated Sep 6, 2026

Redis version

7.2.4

Redisson version

4.3.1

Redisson configuration

I am trying to connect to a Valkey server running in Master/Slave mode.

When I try to connect, I am getting the following error:

org.redisson.client.RedisConnectionException: java.util.concurrent.ExecutionException: org.redisson.client.RedisConnectionException: Unable to init enough connections amount! Only 4 of 5 were initialized. Redis server: valkey/10.96.255.100:6379
	at org.redisson.connection.MasterSlaveConnectionManager.doConnect(MasterSlaveConnectionManager.java:255)
	at org.redisson.connection.MasterSlaveConnectionManager.connect(MasterSlaveConnectionManager.java:190)
	at org.redisson.connection.ConnectionManager.create(ConnectionManager.java:98)
	at org.redisson.Redisson.<init>(Redisson.java:76)
	at org.redisson.Redisson.create(Redisson.java:119)

This is the code:

Config config = new Config();

// need to set RESP3 protocol for near cache behavior
config.setProtocol(Protocol.RESP3);
config.setNettyThreads(64);

String slaveAddress = System.getenv("REDIS_READ_HOST");
if (StringUtils.isBlank(slaveAddress)) {
slaveAddress = redisHost;
}

LOGGER.info("Using Replica mode for valkey");
LOGGER.info(String.format("Connecting to Redis Master at: %s://%s:%s", protocolPrefix, redisHost, port));
LOGGER.info(String.format("Connecting to Redis Slave at: %s://%s:%s", protocolPrefix, slaveAddress, port));

config.useMasterSlaveServers()
        .setConnectTimeout(CONNECT_TIMEOUT_MILLIS)
        .setTimeout(TIMEOUT_MILLIS)
        .setMasterAddress(String.format("%s://%s:%s", protocolPrefix, redisHost, redisPort))
        .setMasterConnectionMinimumIdleSize(MASTER_CONNECTION_MINIMUM_IDLE_SIZE)
        .setMasterConnectionPoolSize(MASTER_CONNECTION_POOL_SIZE)
        .setSlaveConnectionPoolSize(SLAVE_CONNECTION_POOL_SIZE)
        .setSlaveConnectionMinimumIdleSize(SLAVE_CONNECTION_MINIMUM_IDLE_SIZE)
        .setReadMode(ReadMode.MASTER_SLAVE)
        .setSlaveAddresses(Collections.singleton(String.format("%s://%s:%s", protocolPrefix, slaveAddress, redisPort)))
;

this.redissonClient = Redisson.create(config);
this.redissonNearCacheClient = this.redissonClient.getClientSideCaching(ClientSideCachingOptions.defaults());

I am using the following endpoints:

valkey            ClusterIP   10.96.255.100   <none>        6379/TCP            29d
valkey-headless   ClusterIP   None            <none>        6379/TCP            10d
valkey-metrics    ClusterIP   10.96.72.100    <none>        9121/TCP            29d
valkey-read       ClusterIP   10.96.245.49    <none>        6379/TCP            10d

Valkey Info:

redis_version:7.2.4
server_name:valkey
valkey_version:8.1.6
valkey_release_stage:ga
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:4772282777498b2d
server_mode:standalone
os:Linux 5.15.0-322.203.3.5.el9uek.x86_64 x86_64
arch_bits:64

What is the Expected behavior?

The connection should succeed.

What is the Actual behavior?

Connection failing with exception:

org.redisson.client.RedisConnectionException: java.util.concurrent.ExecutionException: org.redisson.client.RedisConnectionException: Unable to init enough connections amount! Only 4 of 5 were initialized. Redis server: valkey/10.96.255.100:6379
	at org.redisson.connection.MasterSlaveConnectionManager.doConnect(MasterSlaveConnectionManager.java:255)
	at org.redisson.connection.MasterSlaveConnectionManager.connect(MasterSlaveConnectionManager.java:190)
	at org.redisson.connection.ConnectionManager.create(ConnectionManager.java:98)
	at org.redisson.Redisson.<init>(Redisson.java:76)
	at org.redisson.Redisson.create(Redisson.java:119)

Additional information

I am using the valkey-io/valkey-helm chart. I deployed in replica mode with 6 replicas.

Source: redisson/redisson

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