ClassCastException: Integer cannot be cast to String about jedis HOT 7 CLOSED

By the way, restarting my servlet container fixes the issue

from jedis.

Thanks for submitting this. Are you sharing Jedis between requests or you are opening a new one for every request?

from jedis.

I believe I am sharing Jedis instances between requests. I'm using a pool to obtain it.

Here is the spring config that creates the JedisPool and the CacheRepository. Because scope isn't specified, it defaults to singleton.

<bean id="jedisPool" class="redis.clients.jedis.JedisPool"
    init-method="init">
    <constructor-arg index="0" value="${redis.host}" />
</bean>

<bean class="com.tedpennings.blog.cache.redis.RedisCacheRepository">
    <constructor-arg index="0" ref="jedisPool" />
    <constructor-arg index="1" value="${redis.json.namespace}" />
    <constructor-arg index="2" value="${redis.json.expiry}" />
</bean>

This issue looks very similar to the issue reported this morning on the google group. I don't think the casts are happening correctly in redis.clients.jedis.Connection

from jedis.

Make sure every request has a different Jedis instance.
If you use JedisPool, you should use getResource() from a request to get a Jedis instance and when finished call returnResource()
You shouldn't share Jedis instances between request because it is not thread safe and wasn't thought for that. You should use JedisPool, which is a thredsafe Jedis factory.
I believe the cast issues you are experiencing are because of sharing Jedis instances. So you call different commands from different threads on the same instance, which leads to trying to get different responses. If they are not executed in order, Jedis instance will be messed up.
I will document that over this weekend. Please let me know if it helped. And if you want realtime answers join the IRC channel.

from jedis.

Thanks, I'll give that a try. We should definitely put up a wiki page on this. I'm happy to contribute code once I get something working (hahaha)

from jedis.

It looks like that fixed it. I ended up using Spring's aspect support to reflectively supply a fresh Jedis instance before each method invocation and return it after. If you want, we could put it in a wiki since there have been a number of questions about this lately.

from jedis.

Great... so I just created a github wiki so everyone can add content. Would you mind adding this please?
http://github.com/xetorthio/jedis/wiki

Thanks a lot!

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