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Önder Sezgin commented on CAMEL-11609: -------------------------------------- if you sync read access, i guess there is potential performance issue and your threading will possibly degrade. maybe there is CopyOnWriteXXX collection or such specific implementation may be needed.. > camel-univocity-parsers: marshaller not thread safe > --------------------------------------------------- > > Key: CAMEL-11609 > URL: https://issues.apache.org/jira/browse/CAMEL-11609 > Project: Camel > Issue Type: Bug > Components: camel-csv > Affects Versions: 2.19.1 > Reporter: Daniel Baldes > Assignee: Önder Sezgin > Fix For: 2.20.0 > > > org.apache.camel.dataformat.univocity.Marshaller.java is not thread safe. > When this.adaptheaders is true, this.headers is modified in the wirteRow() > method. This can lead to ConcurrentModificationExceptions (see below) and > jumbled headers, occasionally. > I use a {{UnivocityCsvDataFormat}} for marshalling CSV in a route which is > called in parallel. The DataFormat creates a Marshaller with adaptheaders == > true when headers are not specified in the format. > {code}java.util.ConcurrentModificationException: null > at > java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719) > at > java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:742) > at > org.apache.camel.dataformat.univocity.Marshaller.writeRow(Marshaller.java:95) > at > org.apache.camel.dataformat.univocity.Marshaller.marshal(Marshaller.java:67) > at > org.apache.camel.dataformat.univocity.AbstractUniVocityDataFormat.marshal(AbstractUniVocityDataFormat.java:94) > at > org.apache.camel.processor.MarshalProcessor.process(MarshalProcessor.java:69) > at > org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77) > at > org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:541) > at > org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198) > at org.apache.camel.processor.Pipeline.process(Pipeline.java:120) > at org.apache.camel.processor.Pipeline.process(Pipeline.java:83) > at > org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198) > at > org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:62) > at > org.apache.camel.processor.SendDynamicProcessor$1.doInAsyncProducer(SendDynamicProcessor.java:124) > at > org.apache.camel.impl.ProducerCache.doInAsyncProducer(ProducerCache.java:436) > at > org.apache.camel.processor.SendDynamicProcessor.process(SendDynamicProcessor.java:119) > at > org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:541) > at > org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:198) > at > org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:97) > at > org.apache.camel.processor.WireTapProcessor$1.call(WireTapProcessor.java:137) > at > org.apache.camel.processor.WireTapProcessor$1.call(WireTapProcessor.java:133) > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > at java.lang.Thread.run(Thread.java:748) > {code} -- This message was sent by Atlassian JIRA (v6.4.14#64029)