Spring Batch：ItemProcessor不会处理所有记录

Question

My batch job doesn't process all read records.

After finish the job, Spring Batch logs that read 198282 records, but in processor I have a log before start the processing and logged only 196503 , but sometimes, the processor process all.

I'm running the job in multi thread with throttle limit = 20, but sometimes I have this problems, not process all.

ItemReader: JpaPagingItemReader with saveState = false

ItemProcessor:

class MyProcessor implements ItemProcessor<Item, Item> {

    @Override
    public Item process(final Item item) {
        log.info("action=process..");
        ....
    }
}

What could be happening? Spring batch is not sending all records to process or I'm doing something wrong to work with multi thread?

Job

@Bean
public Job myJob (Step myStep) {
    return jobBuilderFactory.get("myJob")
            .start(myStep)
            .build();
}

Step

@Bean
public Step consolidateTaxaRebateJobStep (
        JpaPagingItemReader<Item> reader,
        ItemProcessor<Item, Item> processor,
        ItemWriter<Item> writer,
        TaskExecutor taskExecutor) {
    return stepBuilderFactory.get("myStep")
            .<Item, Item>chunk(200)
            .reader(reader)
            .processor(processor)
            .writer(writer)
            .taskExecutor(taskExecutor)
            .throttleLimit(20)
            .build();
}

Spring Boot Version: 2.0.1

Answer 1

问题是我有一个异常侦听器，当某些记录抛出异常时，该块中的所有记录都会被跳过。