Setting item processor property with lambda error

[riane5]

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If the bug is trivial, just go ahead and create the issue. Otherwise, please take a few moments and fill in the following sections:

Bug description
Setting processor property with lambda error
My code is as follows

 stepBuilderFactory.get("step_name_01")
                .allowStartIfComplete(true)
                .<String, String>chunk(2)
                .reader(itemReader())
                // use lambda 
                .processor((Function<String, String>) (in) -> "hello " + in)
                .writer(list -> list.forEach(System.out::println))
                .faultTolerant() // this will new FaultTolerantStepBuilder
                .skip(MyBatchException.class)
                .skipLimit(1)
                .build();

So I found that the item processor did not work，because the itemprocessorfunction property of Faulttolerantstepbuilder is null，its itemProcessor property is null。

protected FaultTolerantStepBuilder(SimpleStepBuilder<I, O> parent) {
           super(parent);
}
protected SimpleStepBuilder(SimpleStepBuilder<I, O> parent) {
		super(parent);
		this.chunkSize = parent.chunkSize;
		this.completionPolicy = parent.completionPolicy;
		this.chunkOperations = parent.chunkOperations;
		this.reader = parent.reader;
		this.writer = parent.writer;
		this.processor = parent.processor;
		this.itemListeners = parent.itemListeners;
		this.readerTransactionalQueue = parent.readerTransactionalQueue;
}

Why is the itemprocessorfunction attribute not synchronized in the constructor ？？？？？？
Should I add the following code to the constructor ？？
this.itemprocessorfunction =parent.itemprocessorfunction

Thank you

[fmbenhassine]

Thank you for opening this issue. This is indeed a bug in SimpleStepBuilder. This test fails with a fault-tolerant step.

The change you are suggesting fixes the issue, so you are welcome to submit a PR if you want.

[parikshitdutta]

Hi @benas, please review submitted PR #3897, I will look forward to your feedback.

[fmbenhassine]

Resolved with #3897 .