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I still have a problem, this is what I see during Tomcat start-up:
WARN : net.sf.ehcache.config.CacheConfiguration - Cache: simple has a maxElementsInMemory of 0. This might lead to performance...

batch job config for parallel execution:
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<bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property...

this helps reading files in folders, here you need only one service activator:
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<bean id="recursiveScanner"...