[sword-devel] CrossWire Server Problems

[Manfred Bergmann]

Am 17.04.2009 um 04:26 schrieb Troy A. Griffitts:

> A few things that changed recently.
>
> I updated to jdk 1.6.0_13
>
> I added the following env variable for tomcat:
> export JAVA_OPTS="-server -Xms4096m -Xmx8192m"
>
> Wondering if anyone has insights...  I can always put them back if  
> we think these are bad.

I never have seen Tomcat with so much initial heap.
But I never have seen Tomcat with so many web application either.
So I guess it is ok.
Is there a limit in the Tomcat docs on this?

>
>
> Regarding swordorbserver.  FileMgr in SWORD limits number of open  
> connection.  The default, which isn't changed in swordorbserver, is  
> set to: 35
> We could drop this if we think this is a problem.  But I think our  
> server can handle anything we throw at it, so I'd rather up the  
> kernel limit, if this is our problem.
>
> More comments welcome.
>
> 	-Troy.
>
>
>
>
>
> Gregory Hellings wrote:
>> DM,
>> On Apr 16, 2009, at 20:09, DM Smith <dmsmith at crosswire.org> wrote:
>>> There have been some problems with the server lately.
>>>
>>> I think, but am not sure, that tomcat is having problems. I'm not  
>>> very up on tomcat, so take what follows with a grain of salt.
>>>
>>> For those with server access and appropriate permissions, tomcat  
>>> logs have a wealth of info and can be found at:
>>> /opt/tomcat/logs
>>>
>>> In catalina.out the following error is repeated frequently:
>>> java.io.FileNotFoundException: /opt/tomcat/webapps/gobible/WEB-INF/ 
>>> classes/trans_null.properties (Permission denied)
>>> This is followed by a java stack trace.
>> I'm extrapolating from times I've seen similar errors in my own  
>> code: the program is failing to initialize a translation name  
>> correctly, so the null appears when a null reference to a string is  
>> concerted to the file name.
>>>
>>>
>>> The only other errors I see in that file are related to the Bible  
>>> Tool, where the process tries to attach to a running process  
>>> (throwing an exception) and then starts another process because of  
>>> the failure.
>>>
>>> Other than that this log indicates a heavy usage of the forums.
>>>
>>> In catalina2009-04-16.log
>>> There are a lot of problems opening jar files. Doing a spot check  
>>> indicates that the jars are fine. But looking a bit closer in the  
>>> log, each one of these is followed by a stack trace indicating  
>>> "Too many files open"
>>>
>>> Musing out loud: It appears that some of the more common jar files  
>>> are repeated for each webapp. Should they be put in a common area?  
>>> (I don't know enough to know.)
>> This is definitely possible. In tomcat's top directory there is a  
>> place to put shared jar files, like DB drivers, JSword, Lucene or  
>> others. This only would present a problem if people must keep a  
>> different version than the globally installed one. In that case,  
>> precedence is determined by the configuration of Catalina's  
>> classpath.
>> --Greg
>>>
>>>
>>> I'm also wondering whether the BibleTool holds too many open file  
>>> descriptors? (I have no idea, but JSword had that problem.)
>>>
>>> The number of open file descriptors is a tunable kernel parameter,  
>>> so maybe it can be adjusted upward?
>>>
>>> Anyway, this is probably more heat than light.
>>>
>>>
>>> In Him,
>>>   DM
>>>
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