Jedis behave unexpectedly with multiple sentinel in redis

Question

I am using Spring 2.1.1 and Redis 4.0.1. I have configured two node computers one with IP:192.168.20.40 with master configuration and other with IP:192.168.20.55 with slave configuration. I am running Springboot application using jedis (not using spring-jedis) on two systems, different conditions are occuring-

@Bean
public JedisSentinelPool jedisSentinelPool() {
    Set<String> sentinels=new HashSet<>();  
    sentinels.add("192.168.20.40:26379");
    sentinels.add("192.168.20.55:26379");
    JedisSentinelPool jedisSentinelPool=new JedisSentinelPool("mymaster", sentinels);
    return jedisSentinelPool;
}

1. When running application on master node(redis configured with master) data get entred in cache.
2. When running application on slave node(redis configured with slave),exception occured - (i.) I am able to get the jedis object from sentinel pool but unable to store data into the redis with exception "redis.clients.jedis.exceptions.JedisDataException: READONLY You can't write against a read only slave."

3. When running application on another server(192.168.20.33), and redis server are hosted on "IP:192.168.20.40" & "IP:192.168.20.55" , then my application is unable to get the jedis object from sentinel pool-

   public String addToCache(@PathVariable("cacheName") String cacheName, HttpEntity<String> httpEntity, @PathVariable("key") String key) {
   try (Jedis jedis = jedisPool.getResource();) {
       long dataToEnter = jedis.hset(cacheName.getBytes(), key.getBytes(), httpEntity.getBody().getBytes());
       if (dataToEnter == 0)
           log.info("data existed in cache {} get updated ",cacheName);
       else
           log.info("new data inserted in cache {}",cacheName);
   } catch (Exception e) {
       System.out.println(e);
   }
       return httpEntity.getBody();
   }
   

   any input would be appreciable.

Answer 1

Can you please check you redis configuration file (redis.conf). It should have read-only mode enabled by default. You need to change the read only mode to false.