Re: Exception : java.lang.ClassCastException: [B cannot be cast to java.util.List Multithreading environnement

[Jonathan Leibiusky]

Does it happen all the time or sometimes?

Also, if I run this code on an empty redis instance I will get that error?

On Thu, Feb 6, 2014 at 5:33 AM, Wahyd Mnémoi <mnemoi...@gmail.com> wrote:

Hi,

First, (i'm sorry for my poor English in advance, i'm not very fluent), so i'm getting a classcast exception, here the code : 

public static Set<String> findEntries(String nameClass, String fieldName, Object fieldValue) {

        Jedis j = null;

        try {

            j = pool.getResource();

        } catch (Exception e) {

            LOGGER.error(e.getMessage(), e);

        }

        try {

            String key = nameClass+ "<" + fieldName + ">";

            double minmaxScore = calculateScore(fieldValue);

            Set<String> result = j.zrangeByScore(key, minmaxScore, minmaxScore);

            return result;

        } catch (JedisConnectionException e) {

            LOGGER.error(e.getMessage(), e);

            if (j != null) {

                pool.returnBrokenResource(j);

                j = null;

            }

}

        } finally {

            if(j != null)

                pool.returnResource(j);

        }

}

Here the exception : 

java.lang.ClassCastException: [B cannot be cast to java.util.List

at redis.clients.jedis.Connection.getBinaryMultiBulkReply(Connection.java:202)

at redis.clients.jedis.Connection.getMultiBulkReply(Connection.java:195)

at redis.clients.jedis.Jedis.zrangeByScore(Jedis.java:2023)

[..]

I have implemented a webservice which call this method with a asynchronous client and it throws this exception. Any ideas ? I use Redis 2.6 and Jedis 2.2.1

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[Wahyd Mnémoi]

it often happen during the load test. So i don't think you get that error on an empty redis instance.

I thought it could be due to the implementation of my JedisPool or the way i release jedis instance, so here is the code

of the instanciation of my JedisPool : 

 static {

        JedisPoolConfig config = new JedisPoolConfig();

        config.setTestOnBorrow(true);

        pool = new JedisPool(config, "localhost");

    }

[임정택]

Hello, Wahyd.

Could you please reproduce this issue again with latest Jedis release, which version is 2.3.1?

Jedis has been resolved several issues after 2.2.1, I guess some issues may related to your problem.

For example, if you're using Jedis 2.2.1 and maybe Redis disconnect client while Jedis is getting bulk response, Jedis could not throw JedisConnectionException and makes strange problem.

(See https://github.com/xetorthio/jedis/pull/468)

Thank you for reporting!

2014년 2월 7일 금요일 오전 1시 5분 28초 UTC+9, Wahyd Mnémoi 님의 말: