Spring Batch - Sporadic issues with Custom FileItemWriter - spring

Question

We have multiple jobs running in Linux environment where jobs run in parallel. We process files with multi-hundred thousands of records in each of these batches. Following is our job steps.xml. This job runs daily but it fails sporadically. It runs 95% of times without any issues but when it fails it fails with below error. Can someone please check what is wrong with our configuration and tell how to address this?
Error:
"org.springframework.batch.item.ItemStreamException: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.com.xxx.xx.batchsync.BatchsyncExtractFileItemWriter': Initialization of bean failed; nested exception is java.lang.IllegalStateException: **Not allowed to access field 'outputFile2': java.lang.IllegalAccessException: Class org.springframework.batch.core.jsr.launch.support.BatchPropertyBeanPostProcessor$1 can not access a member of class com.xxx.xx.std.StdFileItemWriter with modifiers "private"**
at org.springframework.batch.jsr.item.CheckpointSupport.open(CheckpointSupport.java:65)
at org.springframework.batch.item.support.CompositeItemStream.open(CompositeItemStream.java:96)
at org.springframework.batch.core.step.tasklet.TaskletStep.open(TaskletStep.java:310)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:197)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148)
at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64)
at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:67)
at org.springframework.batch.core.jsr.job.flow.support.state.JsrStepState.handle(JsrStepState.java:53)
at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:169)
at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:144)
at org.springframework.batch.core.jsr.job.flow.JsrFlowJob.doExecute(JsrFlowJob.java:82)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:306)
at org.springframework.batch.core.jsr.launch.JsrJobOperator$2.run(JsrJobOperator.java:675)
at java.lang.Thread.run(Thread.java:809)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.com.xxx.xx.batchsync.BatchsyncExtractFileItemWriter': Initialization of bean failed; nested exception is java.lang.IllegalStateException: Not allowed to access field 'outputFile2': java.lang.IllegalAccessException: Class org.springframework.batch.core.jsr.launch.support.BatchPropertyBeanPostProcessor$1 can not access a member of class com.xxx.xx.std.StdFileItemWriter with modifiers "private"
at org.springframework.beans.factory.support.AbstractAutowireCapa"
Steps.xml:
enter code here
<step id="#{jobParameters['STEPNAME']}-Step1">
<properties>
<property name="JOB_FILE_NAME" value="BatchsyncExtract"/>
<property name="JOBNAME" value="#{jobParameters['JOBNAME']}"/>
<property name="STEPNAME" value="#{jobParameters['STEPNAME']}"/>
<property name="APPL" value="#{jobParameters['APPL']}"/>
<property name="BANK" value="#{jobParameters['BANK']}"/>
<property name="ODATE" value="#{jobParameters['ODATE']}"/>
<property name="PREVENT_JOB_RESTART" value="#{jobParameters['PREVENT_JOB_RESTART']}"/>
<property name="BATCH_ROOT" value="#{jobParameters['BATCH_ROOT']}"/>
<property name="WSBATCH_HOME" value="#{jobParameters['WSBATCH_HOME']}"/>
<property name="BATCH_LOG_FOLDER" value="#{jobParameters['BATCH_ROOT']}/batch/logs"/>
<property name="BUSINESS_MAIN" value="com.xxx.xx.BatchsyncExtractBusinessmain"/>
<property name="PROGRAM_NAME" value="IV-IpBatchsyncExtract"/>
<property name="TODAY" value="#{jobParameters['TODAY']}"/>
....
<property name="PARTITION" value="#{jobParameters['WSBATCH_HOME']}/partinfo/BatchsyncExtract_LdbidIpIdPartition_#{jobParameters['BANK']}.xml"/>
<property name="CHUNKSIZE" value="#{jobParameters['CHUNKSIZE']}" />
</properties>
<listeners>
<listener ref="com.xxx.xx.std.StdStepListener">
</listener>
<listener ref="com.xxx.xx.std.StdChunkListener">
</listener>
</listeners>
<chunk checkpoint-policy="custom" >
<reader ref="com.xxx.xx.BatchsyncExtractInputBDS">
</reader>
<processor ref="com.xxx.xx.std.StdJobStepCursorBased"/>
<writer ref="com.xxx.xx.BatchsyncExtractFileItemWriter">
<properties>
<property name="outputFile1" value="#{jobParameters['BATCH_ROOT']}/batch/import/#{jobParameters['APPL']}/batchsync_extract_#{jobParameters['BANK']}_#{jobParameters['ODATE']}_#{jobParameters['RUN']};default;default" />
<property name="outputFile2" value="#{jobParameters['BATCH_ROOT']}/batch/import/#{jobParameters['APPL']}/batchsync_extract_totals_#{jobParameters['BANK']}_#{jobParameters['ODATE']}_#{jobParameters['RUN']};default;default" />
</properties>
</writer>
<checkpoint-algorithm ref="com.xxx.xx.batch.utils.CustomCheckPointAlgoritmn">
<properties>
<property name="chunkSize" value="#{jobParameters['CHUNKSIZE']}" />
<!--property name="timeInterval" value="#{jobParameters['TIMEINTERVAL']}" /-->
</properties>
</checkpoint-algorithm>
</chunk>
</step>