It seems like server has closed the connection

[mathieucarbou]

Hi,

We are using redis in a web application. The Jedis poll is retreived through JNDI. Using Jetty, we have configured it like this:

<New class="org.eclipse.jetty.plus.jndi.Resource">
    <Arg>redis/jaxspot</Arg>
    <Arg>
        <New class="redis.clients.jedis.JedisPool">
            <Arg>
                <New class="org.apache.commons.pool.impl.GenericObjectPool$Config">
                    <Set type="int" name="minIdle">4</Set>
                    <Set type="int" name="maxActive">10</Set>
                </New>
            </Arg>
            <Arg>127.0.0.1</Arg>
            <Arg type="int">6379</Arg>
        </New>
    </Arg>
</New>

So this is basically a pool of 4 to 10 connections. In our application the first requests goes well. But when we wait about 2-3 minutes and we refresh the page, redis crashed. The following code:

Jedis jedis = pool.getResource();
[...]
String v = jedis.get(s);

throws the exception:

Caused by: redis.clients.jedis.JedisException: It seems like server has closed the connection.
at redis.clients.util.RedisInputStream.readLine(RedisInputStream.java:90)
at redis.clients.jedis.Protocol.processBulkReply(Protocol.java:83)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:121)
at redis.clients.jedis.Connection.getBinaryBulkReply(Connection.java:163)
at redis.clients.jedis.Connection.getBulkReply(Connection.java:153)
at redis.clients.jedis.Jedis.get(Jedis.java:68)
at net.playtouch.jaxspot.module.caching.redis.RedisTransactionalCache$1.execute(RedisTransactionalCache.java:28)

[mathieucarbou]

Jedis: 1.5.0
Redis: redis-2.2.0-rc2.tar.gz

[yaourt]

You need to configure the pool with "testOnBorrow = true" ...
Redis server is shuting down the connections after a while, and you need to test if the connection is still useable on the client side ...

[mathieucarbou]

Thank you it works!

[nafeger]

Just to beat a dead horse a bit, might a good pool setup for a long running server process be as simple as:

JedisPoolConfig config = new JedisPoolConfig();
config.setTestOnBorrow(true);
this.pool = new JedisPool(config, this.redisServer, this.redisPort);

[willzhai]

when i use redis-2.2.2 and jedis-1.5.2

static {
if (pool == null) {
redis.clients.jedis.JedisPoolConfig config = new redis.clients.jedis.JedisPoolConfig();
config.maxActive = 20;
config.maxIdle = 10;
config.maxWait = 1000;
config.testOnBorrow = true;
pool = new JedisPool(config, REDISHOST, REDISPORT);
}
}

i got the following and do not know why，~~~~(>_<)~~~~ :

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool

java.util.NoSuchElementException: Could not create a validated object, cause: ValidateObject failed org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1203)
redis.clients.util.Pool.getResource(Pool.java:20)

[yychaoV5]

jedis with some error： when redis server send back "Protocol error" message , the server will close socket; but jedis Protocol.java just throw a JedisDataException exception and ignored tcp close segment; so if you reuse this connection, jedis will throw an exception with "It seems like server has closed the connection" message.