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From "Claus Ibsen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CAMEL-2776) Cached stream file deletion causing file not found errors
Date Wed, 02 Jun 2010 04:07:51 GMT

    [ https://issues.apache.org/activemq/browse/CAMEL-2776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=59628#action_59628
] 

Claus Ibsen commented on CAMEL-2776:
------------------------------------

The stream cache should be changed to use HawtDB or the likes for a better cache store and
leverage Exchange OnCompletion to cleanup the cache. This will ensure the "file" is not deleted
pre mature.



> Cached stream file deletion causing file not found errors
> ---------------------------------------------------------
>
>                 Key: CAMEL-2776
>                 URL: https://issues.apache.org/activemq/browse/CAMEL-2776
>             Project: Apache Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 2.3.0
>            Reporter: Roland Knight
>             Fix For: 2.4.0, 2.5.0
>
>
> Cached streams larger than the threshold (64K by default) are almost impossible to work
with since when a cached stream is closed, the cached file is deleted. This occurs as a side
effect of converting the associated body to string which can occur frequently if tracing is
turned on. The net result is file not found errors shown below. The only workaround is to
increase the threshold to a large value to keep the body in memory.
> It seems that if stream caching is to be useful, the cached files should be kept in a
map and cleaned up and the end of the route, rather than upon close.
> Work around (set threshold to 10M):
>     camelContext.getProperties().put(CachedOutputStream.THRESHOLD, "10000000");
> Error without work around:
> 16:09:49.278 [main] ERROR o.a.c.c.t.TimerConsumer - Error processing exchange. Exchange[Message:
[Body is instance of java.io.InputStream]]. Caused by: [org.apache.camel.RuntimeCamelException
- java.io.FileNotFoundException: C:\Users\ROLAND~1\AppData\Local\Temp\camel-tmp-594543\cos3643004935230268170.tmp
(The system cannot find the file specified)]
> org.apache.camel.RuntimeCamelException: java.io.FileNotFoundException: C:\Users\ROLAND~1\AppData\Local\Temp\camel-tmp-594543\cos3643004935230268170.tmp
(The system cannot find the file specified)
> 	at org.apache.camel.converter.stream.FileInputStreamCache.reset(FileInputStreamCache.java:65)
> 	at org.apache.camel.util.MessageHelper.resetStreamCache(MessageHelper.java:106)
> 	at org.apache.camel.processor.RedeliveryErrorHandler.deliverToFailureProcessor(RedeliveryErrorHandler.java:344)
> 	at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:111)
> 	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:89)
> 	at org.apache.camel.processor.DefaultErrorHandler.process(DefaultErrorHandler.java:49)
> 	at org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:228)
> 	at org.apache.camel.processor.Pipeline.process(Pipeline.java:75)
> 	at org.apache.camel.processor.UnitOfWorkProcessor.processNext(UnitOfWorkProcessor.java:80)
> 	at org.apache.camel.processor.DelegateProcessor.process(DelegateProcessor.java:48)
> 	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:67)
> 	at org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:44)
> 	at org.apache.camel.processor.SendProcessor$1.doInProducer(SendProcessor.java:106)
> 	at org.apache.camel.processor.SendProcessor$1.doInProducer(SendProcessor.java:104)
> 	at org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:189)
> 	at org.apache.camel.processor.SendProcessor.doProcess(SendProcessor.java:103)
> 	at org.apache.camel.processor.SendProcessor.process(SendProcessor.java:87)
> 	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:67)
> 	at org.apache.camel.processor.DelegateProcessor.processNext(DelegateProcessor.java:53)
> 	at org.apache.camel.processor.DelegateProcessor.proceed(DelegateProcessor.java:82)
> 	at org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:173)
> 	at org.apache.camel.processor.interceptor.StreamCachingInterceptor.process(StreamCachingInterceptor.java:52)
> 	at org.apache.camel.processor.interceptor.StreamCachingInterceptor.process(StreamCachingInterceptor.java:52)
> 	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:67)
> 	at org.apache.camel.processor.RedeliveryErrorHandler.processExchange(RedeliveryErrorHandler.java:185)
> 	at org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:151)
> 	at org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:89)
> 	at org.apache.camel.processor.DefaultErrorHandler.process(DefaultErrorHandler.java:49)
> 	at org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:228)
> 	at org.apache.camel.processor.Pipeline.process(Pipeline.java:75)
> 	at org.apache.camel.processor.UnitOfWorkProcessor.processNext(UnitOfWorkProcessor.java:70)
> 	at org.apache.camel.processor.DelegateProcessor.process(DelegateProcessor.java:48)
> 	at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:67)
> 	at org.apache.camel.component.timer.TimerConsumer.sendTimerExchange(TimerConsumer.java:102)
> 	at org.apache.camel.component.timer.TimerConsumer$1.run(TimerConsumer.java:49)
> 	at java.util.TimerThread.mainLoop(Timer.java:512)
> 	at java.util.TimerThread.run(Timer.java:462)
> Caused by: java.io.FileNotFoundException: C:\Users\ROLAND~1\AppData\Local\Temp\camel-tmp-594543\cos3643004935230268170.tmp
(The system cannot find the file specified)
> 	at java.io.FileInputStream.open(Native Method)
> 	at java.io.FileInputStream.<init>(FileInputStream.java:106)
> 	at org.apache.camel.converter.stream.FileInputStreamCache.reset(FileInputStreamCache.java:63)
> 	... 36 common frames omitted

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