Mina working on Netbeans and fails in a fat-jar? - apache-camel

Question

Strange problem, it fails if we create a fat-jar to execute the project but not from Netbeans. Any clue why?
It's simple apache-camel app, it starts a route using Mina to receive an HL7 and then uses a bean that directly answer the ACK message, a simple sample.
<bean id="hl7codec" class="org.apache.camel.component.hl7.HL7MLLPCodec">
<property name="charset" value="utf-8"/>
</bean>
<bean id="answerACKHL7" class="com.mycompany.AnswerEMRBean" />
<camelContext xmlns="http://camel.apache.org/schema/spring">
<route customId="true" id="routeID">
<from uri="mina:tcp://localhost:8255?sync=true&codec=#hl7codec" />
<bean ref="answerACKHL7" method="sendACK" />
</route>
</camelContext>
The app has another java defined REST route but this part works equals both in Netbeans and executing jar file.
If we run it from Netbeans and send an HL7 message to the port it works. Ok, we build a fat-jar with maven-shade-plugin 3.2.4 and run it with java -jar jarfile.jar everything seems to start ok then we send the same HL7 message that works if running from netbeans and got an Exception.
Copy of error message:
GRAVE: Failed delivery for (MessageId: ID-DESKTOP-O7B5GIN-1603385955728-0-1 on ExchangeId: ID-DESKTOP-O7B5GIN-1603385955728-0-1). Exhausted after delivery attempt: 1 caught: org.apache.camel.CamelExecutionException: Exception occurred during execution on the exchange: Exchange[]
Message History (complete message history is disabled)
RouteId ProcessorId Processor Elapsed (ms)
[routeID ] [routeID ] [from[mina://tcp://localhost:8255?codec=%23hl7codec&sync=true] ] [ 45]
...
[routeID ] [bean1 ] [bean[ref:answerACKHL7 method:sendACK] ] [ 0]
Stacktrace
org.apache.camel.CamelExecutionException: Exception occurred during
execution on the exchange: Exchange[]
at org.apache.camel.CamelExecutionException.wrapCamelExecutionException(CamelExecutionException.java:47)
at org.apache.camel.support.builder.ExpressionBuilder$32.evaluate(ExpressionBuilder.java:943)
at org.apache.camel.support.ExpressionAdapter.evaluate(ExpressionAdapter.java:36)
at org.apache.camel.component.bean.MethodInfo$ParameterExpression.evaluateParameterBinding(MethodInfo.java:748)
at org.apache.camel.component.bean.MethodInfo$ParameterExpression.evaluateParameterExpressions(MethodInfo.java:640)
at
org.apache.camel.component.bean.MethodInfo$ParameterExpression.evaluate(MethodInfo.java:608)
at org.apache.camel.component.bean.MethodInfo.createMethodInvocation(MethodInfo.java:195)
at org.apache.camel.component.bean.BeanInfo.createInvocation(BeanInfo.java:265)
at org.apache.camel.component.bean.AbstractBeanProcessor.process(AbstractBeanProcessor.java:135)
at org.apache.camel.component.bean.BeanProcessor.process(BeanProcessor.java:56)
at org.apache.camel.processor.errorhandler.RedeliveryErrorHandler$SimpleTask.run(RedeliveryErrorHandler.java:395)
at org.apache.camel.impl.engine.DefaultReactiveExecutor$Worker.schedule(DefaultReactiveExecutor.java:148)
at org.apache.camel.impl.engine.DefaultReactiveExecutor.scheduleMain(DefaultReactiveExecutor.java:60)
at org.apache.camel.processor.Pipeline.process(Pipeline.java:147)
at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:286)
at org.apache.camel.impl.engine.DefaultAsyncProcessorAwaitManager.process(DefaultAsyncProcessorAwaitManager.java:83)
at org.apache.camel.support.AsyncProcessorSupport.process(AsyncProcessorSupport.java:40)
at org.apache.camel.component.mina.MinaConsumer$ReceiveHandler.messageReceived(MinaConsumer.java:409)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:1015)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:650)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:49)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:1128)
at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:106)
at org.apache.mina.core.session.IoEvent.run(IoEvent.java:89)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTask(OrderedThreadPoolExecutor.java:766)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTasks(OrderedThreadPoolExecutor.java:758)
at
org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.run(OrderedThreadPoolExecutor.java:697)
at java.lang.Thread.run(Unknown Source) Caused by: org.apache.camel.InvalidPayloadException: No body available of type:
ca.uhn.hl7v2.model.Message but has value: ... copy of all the message here ... of type:
java.lang.String on: Message. Caused by: No type converter available
to convert from type: java.lang.String to the required type:
ca.uhn.hl7v2.model.Message with value ... copy of all the HL7 message... . Exchange[].
Caused by: [org.apache.camel.NoTypeConversionAvailableException - No
type converter available to convert from type: java.lang.String to the
required type: ca.uhn.hl7v2.model.Message with value ... copy of all the HL7 message
again... ]
at org.apache.camel.support.MessageSupport.getMandatoryBody(MessageSupport.java:118)
at org.apache.camel.support.builder.ExpressionBuilder$32.evaluate(ExpressionBuilder.java:941)
... 26 more Caused by: org.apache.camel.NoTypeConversionAvailableException: No type converter
available to convert from type: java.lang.String to the required type:
ca.uhn.hl7v2.model.Message with value ...
at org.apache.camel.impl.converter.CoreTypeConverterRegistry.mandatoryConvertTo(CoreTypeConverterRegistry.java:216)
at org.apache.camel.support.MessageSupport.getMandatoryBody(MessageSupport.java:116)
... 27 more oct 22, 2020 6:59:15 PM org.apache.camel.component.mina.MinaConsumer$ReceiveHandler
exceptionCaught ADVERTENCIA: Closing session as an exception was
thrown from MINA oct 22, 2020 6:59:15 PM
org.apache.mina.core.filterchain.DefaultIoFilterChain
callNextExceptionCaught ADVERTENCIA: Unexpected exception from
exceptionCaught handler. org.apache.camel.CamelException:
org.apache.mina.filter.codec.ProtocolEncoderException:
org.apache.camel.CamelExecutionException: Exception occurred during
execution on the exchange: Exchange[]
at org.apache.camel.component.mina.MinaConsumer$ReceiveHandler.exceptionCaught(MinaConsumer.java:387)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.exceptionCaught(DefaultIoFilterChain.java:987)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextExceptionCaught(DefaultIoFilterChain.java:706)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1100(DefaultIoFilterChain.java:49)
at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.exceptionCaught(DefaultIoFilterChain.java:1110)
at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:97)
at org.apache.mina.core.session.IoEvent.run(IoEvent.java:89)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTask(OrderedThreadPoolExecutor.java:766)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTasks(OrderedThreadPoolExecutor.java:758)
at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.run(OrderedThreadPoolExecutor.java:697)
at java.lang.Thread.run(Unknown Source)
...
More info
Camel version 3.2.0
Java version 1.8.0.221 (should be the same in both Netbeans and command-line)
Any idea why it fails from built jar???
Regards.

Answer 1

With shading of depedencies to fat jar you need to instruct maven plugin, how to handle duplicate resources. In your case is maven-shade-plugin overriding TypeConverterLoader which is responsible for type conversion and thus you get
No type converter available to convert from type: java.lang.String to the required type exception.
You need to configure maven-shade-plugin to merge this resource. See How to create executable JAR for camel-main project:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<shadedArtifactAttached>true</shadedArtifactAttached>
<shadedClassifierName>executable-jar</shadedClassifierName>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>my.package.MainClass</mainClass>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/services/org/apache/camel/TypeConverterLoader</resource>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>