Hi,
I’m using the Camel printer component to send PDF files to a print queue. When
I configure the endpoint like this, the lpr command is executed twice with the
-#2 parameter:
lpr://localhost/printer?copies=2&mediaSize=ISO_A4&flavor=DocFlavor.INPUT_STREAM
component.printer.PrinterProducer DEBUG Printer service printer name: printer
component.printer.PrinterOperations DEBUG Issuing Job 0 to Printer: printer
component.printer.PrinterOperations DEBUG Issuing Job 1 to Printer: printer
ERROR ID-47935-1516954952584-8-4
java.io.IOException: error=1 running: '/usr/bin/lpr' '-Pprinter' '-J file.pdf'
'-#2' '-o media=A4 sides=one-sided'
'/opt/tomcat/temp/javaprint7376295310894617090'
/usr/bin/lpr: No file in print request.
javax.print.PrintException: java.io.IOException: error=1 running:
'/usr/bin/lpr' '-PBriefing' '-J file.pdf' '-#2' '-o media=A4 sides=one-sided'
'/opt/tomcat/temp/javaprint7376295310894617090'
/usr/bin/lpr: No file in print request.
at sun.print.UnixPrintJob$PrinterSpooler.run(UnixPrintJob.java:1017)
at java.security.AccessController.doPrivileged(Native Method)
at sun.print.UnixPrintJob.print(UnixPrintJob.java:608)
at
org.apache.camel.component.printer.PrinterOperations.print(PrinterOperations.java:109)
at
org.apache.camel.component.printer.PrinterOperations.print(PrinterOperations.java:99)
at
org.apache.camel.component.printer.PrinterProducer.print(PrinterProducer.java:57)
at
org.apache.camel.component.printer.PrinterProducer.process(PrinterProducer.java:51)
at
org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)
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.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at
org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:542)
at
org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:197)
at
org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:197)
at
org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:62)
at
org.apache.camel.processor.SendProcessor.process(SendProcessor.java:145)
at
org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:77)
at
org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:542)
at
org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:197)
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.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:542)
at
org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:197)
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109)
at
org.apache.camel.processor.MulticastProcessor.doProcessParallel(MulticastProcessor.java:827)
at
org.apache.camel.processor.MulticastProcessor.access$200(MulticastProcessor.java:85)
at
org.apache.camel.processor.MulticastProcessor$1.call(MulticastProcessor.java:320)
at
org.apache.camel.processor.MulticastProcessor$1.call(MulticastProcessor.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
The first job executes correctly, the second one fails because the input file
is empty. Why is the lpr command executed twice? The -#2 parameter already
schedules the desired number of copies.
I think the issue is caused by the following statement being inside the loop:
https://github.com/apache/camel/blob/3505e718db48cc0d8be5b47f6c4030c958d93a5f/components/camel-printer/src/main/java/org/apache/camel/component/printer/PrinterOperations.java#L99
<https://github.com/apache/camel/blob/3505e718db48cc0d8be5b47f6c4030c958d93a5f/components/camel-printer/src/main/java/org/apache/camel/component/printer/PrinterOperations.java#L99>
I’m using Camel 2.18.1 on JDK8.
Best regards,
Robin
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