INCR clears TTL

[serandel]

From the Redis docs:

EXPIRE key seconds
Available since 1.0.0.

Time complexity: O(1)

Set a timeout on key. After the timeout has expired, the key will automatically be deleted. A key with an associated timeout is often said to be volatile in Redis terminology.

The timeout will only be cleared by commands that delete or overwrite the contents of the key, including DEL, SET, GETSET and all the *STORE commands. This means that all the operations that conceptually alter the value stored at the key without replacing it with a new one will leave the timeout untouched. For instance, incrementing the value of a key with INCR, pushing a new value into a list with LPUSH, or altering the field value of a hash with HSET are all operations that will leave the timeout untouched.

Nevertheless, my tests are failing...

        redis = RedisServer.newRedisServer();  // bind to a random port
        redis.start();
        jedis = new Jedis(redis.getHost(), redis.getBindPort());
        jedis.set(REDIS_KEY, "1");
        jedis.expire(REDIS_KEY, REMAINING_TTL);
        assertEquals(REMAINING_TTL, jedis.ttl(REDIS_KEY)); // OK
        jedis.incr(REDIS_KEY);
        assertEquals(REMAINING_TTL, jedis.ttl(REDIS_KEY)); // Got -1

Am I misunderstanding something?

[fppt]

Hmmm let me look into this. Might be a bug in the library.