Getting Exception while trying to do a jedis.get() command - ClassCastException about jedis HOT 12 CLOSED

Are you using a connection pool? I mean, are you using JedisPool?

from jedis.

yes I'm using this that I pasted in the bug report:

jedisPool = new JedisPool(new GenericObjectPool.Config(), "cache01");

I'm using that in my main thread as a public static object. Then in my threads I use the code I pasted in pasteBin.

from jedis.

Ok. So the problem is that Redis by default closes connections after 300 seconds. The connection pool doesn't check idle connections, so your application might receive a broken connection and because of that throw the error you get.
The way to avoid that is setting in the connection pool testOnBorrow=true, that will make sure that all the connections you get are open and ready to receive commands.

from jedis.

thanks,
so something like this?
static {
GenericObjectPool.Config config = new GenericObjectPool.Config();
config.testOnBorrow = true;
jedisPool = new JedisPool(new GenericObjectPool.Config(), "cache01");
}

from jedis.

yes! exactly!!!
let me know if it worked!

from jedis.

will do, testing now... thanks for the quick response :)

from jedis.

unfortunately the problem still happens, just had it happen again. Any other ideas? Have you seen that error before?
I have 250 threads running that pull the jedis resource from the pool if that helps

from jedis.

Oh wait... you are not giving JedisPool the Config you are creating.
Try to do this:

static {
    GenericObjectPool.Config config = new GenericObjectPool.Config();
    config.testOnBorrow = true;
    jedisPool = new JedisPool(config, "cache01"); 
}

from jedis.

I am closing this as I never get a response from you, so I am assuming it worked! :)
thanks for reporting this and if you still have an error just let me know!

from jedis.

Hi,

I am getting into this issue while using Jedis with spring data redis integration. I am setting the configuration to use pool, testOnBorrow as well as testOnReturn true.

I am using Jedis pool, and have verified that spring ensures the resources are returned to the pool, by calling returnResource() and returnBrokenResource in case of exceptions. Still facing this issue. I have a heavily multi-threaded environment.

Error stack -

Thread 1:
[ERROR] [03/01/2015 07:05:32.044] [events-system-akka.actor.default-dispatcher-2281] [akka://events-system/user/$YN/$b/$b/$b] java.lang.Long cannot be cast to java.util.List
java.lang.ClassCastException: java.lang.Long cannot be cast to java.util.List
at redis.clients.jedis.Connection.getRawObjectMultiBulkReply(Connection.java:230)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:236)
at redis.clients.jedis.BinaryJedis.zscan(BinaryJedis.java:3608)
at org.springframework.data.redis.connection.jedis.JedisConnection$3.doScan(JedisConnection.java:2998)
at org.springframework.data.redis.core.KeyBoundCursor.doScan(KeyBoundCursor.java:39)
at org.springframework.data.redis.core.ScanCursor.scan(ScanCursor.java:85)
at org.springframework.data.redis.core.ScanCursor.hasNext(ScanCursor.java:168)
at org.springframework.data.redis.core.ConvertingCursor.hasNext(ConvertingCursor.java:56)
...
application specific stack trace
...

Thread 2:
[ERROR] [03/01/2015 07:03:07.295] [events-system-akka.actor.default-dispatcher-2273] [akka://events-system/user/$VN/$b/$b/$b] Unknown redis exception; nested exception is java.lang.ClassCastException: [B cannot be cast to java.lang.Long
org.springframework.data.redis.RedisSystemException: Unknown redis exception; nested exception is java.lang.ClassCastException: [B cannot be cast to java.lang.Long
at org.springframework.data.redis.FallbackExceptionTranslationStrategy.getFallback(FallbackExceptionTranslationStrategy.java:48)
at org.springframework.data.redis.FallbackExceptionTranslationStrategy.translate(FallbackExceptionTranslationStrategy.java:38)
at org.springframework.data.redis.connection.jedis.JedisConnection.convertJedisAccessException(JedisConnection.java:195)
at org.springframework.data.redis.connection.jedis.JedisConnection.zRem(JedisConnection.java:2321)
at org.springframework.data.redis.core.DefaultZSetOperations$19.doInRedis(DefaultZSetOperations.java:283)
at org.springframework.data.redis.core.DefaultZSetOperations$19.doInRedis(DefaultZSetOperations.java:280)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:190)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:152)
at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:85)
at org.springframework.data.redis.core.DefaultZSetOperations.remove(DefaultZSetOperations.java:280)
...
application specific stack trace
...
Caused by: java.lang.ClassCastException: [B cannot be cast to java.lang.Long
at redis.clients.jedis.Connection.getIntegerReply(Connection.java:210)
at redis.clients.jedis.BinaryJedis.zrem(BinaryJedis.java:1624)
at org.springframework.data.redis.connection.jedis.JedisConnection.zRem(JedisConnection.java:2319)
... 21 more

from jedis.

@deepakpol Could you please post an new issue? Please describe Jedis version and Spring data redis version, too. :)

from jedis.

@HeartSaVioR thanks for the reply, Created a new issue #918

from jedis.