Following (not much really, google and YT for "jedis pubsub" provides only few results) jedis pubsub docs and tutorials I have created most simplest app which we could imagine - simply subscribe to a channel from Redis Sentinel and print it to STDOUT. Here is the code:
Main.class
package org.example;import redis.clients.jedis.Jedis;import redis.clients.jedis.JedisPubSub;import redis.clients.jedis.JedisSentinelPool;import redis.clients.jedis.exceptions.JedisException;import java.util.HashSet;import java.util.Set;public class Main { public static void main(String[] args) { Set<String> sentinels = new HashSet<>(); sentinels.add(RedisCredentials.HOSTNAME +":"+RedisCredentials.PORT); JedisSentinelPool jedisSentinelPool = new JedisSentinelPool("mymaster", sentinels, RedisCredentials.PASSWORD); Jedis jedis = null; try{ jedis = jedisSentinelPool.getResource(); JedisPubSub jedisPubSub = new MyJedisPubSub(); jedis.subscribe(jedisPubSub, "test"); }catch (JedisException e){ System.out.println(e.getMessage()); }finally { if (jedis != null){ jedisSentinelPool.close(); } } }}MyJedisPubSub.class
package org.example;import redis.clients.jedis.JedisPubSub;public class MyJedisPubSub extends JedisPubSub { @Override public void onMessage(String channel, String message) { System.out.printf("Channel %s received message: %s", channel, message); } @Override public void onSubscribe(String channel, int subscribedChannels) { System.out.printf("Subscribed to %s, subscribed total %d channels.", channel, subscribedChannels); } @Override public void onUnsubscribe(String channel, int subscribedChannels) { System.out.printf("Unsubscribed from %s, subscribed total %d channels.", channel, subscribedChannels); }}The problem is that when I'm receiving messages the used memory is increasing (on linux I check it through ps aux and I see that RSS in constantly increasing while I'm sending messages) until OOM point and I need to restart my application. Unfortunately java examples and docs for redis are like Call of Duty United Offensive mod scene, almost nothing is there. It doesn't matter if I send 10 msg/s or 5000 msg/s, effect is the same. Please help with clearing the memory.
PS jedis version 4.3.1, java 11, (I believe it is server version, not my redis-cli) redis_version:5.0.5
I have tried removing everything not related to pure java and jedis and above example is exactly it. I have searched through google tutorials but every tutorial provide almost identical code as above. Nothing is mentioned about jedis and memory,performance, best practices etc on the google.