instances of item reader/writer

I have following code:

Code:

---

<batch:step id="bench">
                <batch:tasklet task-executor="asyncExecutor" throttle-limit="8">
                        <batch:chunk reader="hadoopreader" commit-interval="100"
                                writer="hadoopwriter" cache-capacity="100"
                                processor-transactional="false" processor="solrbench">
                        </batch:chunk>
                </batch:tasklet>
</batch:step>

---

how many instances of item reader, writer, processor are created? 8 or just one reused by multiple threads because "hadoopreader" bean is scope="step"? If i want multiple instances, will scope="prototype" on itemprocessor help?

You'll get one instance of the ItemReader/ItemProcessor/ItemWriter. Spring Batch does not create new instances per thread. Using prototype won't change that either. What are you attempting to accomplish?