Re: FileNotFoundException on existing template

Friday, June 1, 2012, 10:54:37 AM, mira wrote:

>> > Hi, I posted this question on the FreeMarker page 
>> 
>> Where exactly? 
>> 
>
> At
> http://freemarker.624813.n4.nabble.com/FileNotFoundException-on-existing-template-td4654080.html
> (not the user forum)

That's the same email I was replying to, isn't it?

>> > issue so using the spring configurer for freemarker we set the cache to 
>> > Strong: 
>> > 
>> > <bean id="freemarkerConfig" 
>> >
>> class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"> 
>> >       <property name="templateLoaderPath" value="/WEB-INF/views/"/> 
>> >       <property name="freemarkerSettings"> 
>> >         <props> 
>> >           <prop key="url_escaping_charset">UTF-8</prop> 
>> >           <prop key="cache_storage">strong</prop> 
>> >         </props> 
>> >       </property> 
>> >     </bean> 
>> > 
>> > However, the exception still appeared. Do you have any idea why this may
>> be 
>> > happening and how to solve?
>> 
>> I have seen people complaining about these (or just similar?) mystical 
>> FileNotFoundErrors, but it has never turned out what was the cause. 
>> Running out of file handles is a guess (even with a strong cache and 
>> never changing templates, up-to-date checks might need them, or 
>> something can flush the cache explicitly). However, that should leave 
>> a *few* specific IOError-s in the log, along with these generic ones 
>> that you show (which can be the result of an earlier cached failure). 
>> Also then they should usually go away after the template update delay 
>> has passed. 
>
> Regarding this, I found the following that might be relevant:
>
> http://www.coderanch.com/t/423917/Linux-UNIX/Java-app-server-intermittently-throws
>
> The last comment mentions it may be a concurrency issue, so they disable
> caching. A look at the docs supports this as MRUCacheStorage is NOT
> thread-safe

That shouldn't mater, because the TemplateCache synchronizes the
access to it, because it sees that the MRUCacheStorage is not marked
as thread-safe.

> and my above setting to strong does not use StrongCacheStorage
> but rather an MRUCacheStorage with unlimited map size. However, docs state
> that StrongCacheStorage is thread-safe on Java 5 and above so we are going
> to use that. If it re-occurs we will revisit this. 

My guess is that the issue is I/O (TemplateLoader) related, not cache
related. Well, I hope it is...

>> Anyway, I would like to see this solved. So, how about me creating a 
>> special FreeMarker 2.3.16 jar, which logs details about what's going 
>> on whenever there's a problem with "syndi-macros.ftl"? Will you be 
>> allowed to use that on the production server? 
>
> I would have to check regarding this point. So if yes, will get back to you
> on this.
>
>> 
>> Also, it would be good to know what TemplateLoader are you using. 
>
> We do not specify, so basically the default TemplateLoader by freemarker
> with the given path as specified by the docs at
>
> http://static.springsource.org/spring/docs/1.1.4/api/org/springframework/ui/freemarker/FreeMarkerConfigurationFactory.html#setTemplateLoaderPath(java.lang.String)

I suppose you are using
org.springframework.ui.freemarker.SpringTemplateLoader then.

> --
> View this message in context:
> http://freemarker.624813.n4.nabble.com/FileNotFoundException-on-existing-template-tp4654081p4654083.html
> Sent from the freemarker-user mailing list archive at Nabble.com.

-- 
Best regards,
 Daniel Dekany


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