SCAN command with spring redis template

Question

I am trying to execute "scan" command with RedisConnection. I don't understand why the following code is throwing NoSuchElementException

RedisConnection redisConnection = redisTemplate.getConnectionFactory().getConnection();
    Cursor c = redisConnection.scan(scanOptions);
    while (c.hasNext()) {
        c.next();
    }

Exception:

java.util.NoSuchElementException at java.util.Collections$EmptyIterator.next(Collections.java:4189) at org.springframework.data.redis.core.ScanCursor.moveNext(ScanCursor.java:215) at org.springframework.data.redis.core.ScanCursor.next(ScanCursor.java:202)

Answer 1

Yes, I have tried this, in 1.6.6.RELEASE spring-data-redis.version. No issues, the below simple while loop code is enough. And i have set count value to 100 (more the value) to save round trip time.

    RedisConnection redisConnection = null;
    try {
        redisConnection = redisTemplate.getConnectionFactory().getConnection();
        ScanOptions options = ScanOptions.scanOptions().match(workQKey).count(100).build();

        Cursor c = redisConnection.scan(options);
        while (c.hasNext()) {
            logger.info(new String((byte[]) c.next()));
        }
    } finally {
        redisConnection.close(); //Ensure closing this connection.
    }