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From Alvaro Coronel <alvarocorone...@yahoo.com>
Subject Re: Torque generator leaves too many files open
Date Sat, 21 Apr 2007 13:43:58 GMT
Hello Helge
   
  I did not understand clearly at what stage of building you get the error.
   
  So this may or may not be relevant, but I once got rid of a "too many files open" error
by bundling my .class files into a .jar file and placing it in the classpath.
   
  I was also getting the error only when using Linux.
   
  
Helge Weissig <helgew@grajagan.org> wrote:
  Remember this anyone? Well, the problem is back and I am not any 
smarter about it than I was last year.

Basically, I "solved" the issue below only on one single machine by 
using jdk-1.5.0_07 instead of the gnu jdk. That was good enough then, 
however, now I need to be able to compile our application (> 250 
tables) on another machine and I just cannot figure out how to get 
rid of the "Too many open files" error. I have tried everything I can 
think of (jdk versions, ant versions, command line options for 
java.vm.info and java.class.path since I saw some differences there), 
alas, to no avail! Everything compiles fine on Windows and OS X, just 
not on linux. It's not the descriptor limit as that is the same on 
all boxes (1024) except for OS X where it is 256 only.

Any help/pointers would be greatly appreciated. I would be happy to 
share the ant debug output with anyone willing to help.

thanks,
h.



On Apr 24, 2006, at 10:52 AM, Helge Weissig wrote:

> When running the torque generator for a good-sized turbine project, 
> we run into the system limit of 1024 open file descriptors with the 
> stack trace as below, which occurs in the torque-data-model target. 
> lsof indicates that the process is keeping all {Base}Foo{Peer} and 
> associated map classes open. We are still using the ant build based 
> on the turbine TDK, so the previously suggested solutions do not 
> seem to be applicable for us. Library versions are torque-gen-3.2 
> and velocity-1.4. Any advise would be greatly appreciated. We would 
> prefer to solve this without changing the OS limits. OS is FC4, 
> kernel 2.6.15-1.1831_FC4smp. Java is gij version 4.0.2.
>
> thanks,
> h.
>
> PS: Sorry for the cross-post (since it seems a Velocity problem, I 
> may even have to take it there).
>
> java.io.FileNotFoundException: /home/helgew/work/webapps/test/WEB- 
> INF/src/java/org/grajagan/test/om/OneOfManyFoosPeer.java (Too many 
> open files)
> at java.io.FileOutputStream.open(Native Method)
> at java.io.FileOutputStream.(FileOutputStream.java:179)
> at java.io.FileOutputStream.(FileOutputStream.java:70)
> at java.io.FileWriter.(FileWriter.java:46)
> at org.apache.velocity.texen.Generator.getWriter 
> (Generator.java:279)
> at org.apache.velocity.texen.Generator.parse(Generator.java: 
> 383)
> at org.apache.velocity.texen.Generator.parse(Generator.java: 
> 336)
> at sun.reflect.GeneratedMethodAccessor73.invoke(Unknown 
> Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke 
> (DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.apache.velocity.util.introspection.UberspectImpl 
> $VelMethodImpl.invoke(UberspectImpl.java:267)
> at org.apache.velocity.runtime.parser.node.ASTMethod.execute 
> (ASTMethod.java:197)
> at 
> org.apache.velocity.runtime.parser.node.ASTReference.execute 
> (ASTReference.java:175)
> at 
> org.apache.velocity.runtime.parser.node.ASTReference.render 
> (ASTReference.java:220)
> at org.apache.velocity.runtime.parser.node.ASTBlock.render 
> (ASTBlock.java:55)
> at 
> org.apache.velocity.runtime.parser.node.ASTIfStatement.render 
> (ASTIfStatement.java:70)
> at org.apache.velocity.runtime.parser.node.ASTBlock.render 
> (ASTBlock.java:55)
> at 
> org.apache.velocity.runtime.parser.node.ASTIfStatement.render 
> (ASTIfStatement.java:70)
> at org.apache.velocity.runtime.parser.node.ASTBlock.render 
> (ASTBlock.java:55)
> at org.apache.velocity.runtime.directive.Foreach.render 
> (Foreach.java:166)
> at 
> org.apache.velocity.runtime.parser.node.ASTDirective.render 
> (ASTDirective.java:114)
> at org.apache.velocity.runtime.parser.node.ASTBlock.render 
> (ASTBlock.java:55)
> at org.apache.velocity.runtime.directive.Foreach.render 
> (Foreach.java:166)
> at 
> org.apache.velocity.runtime.parser.node.ASTDirective.render 
> (ASTDirective.java:114)
> at org.apache.velocity.runtime.parser.node.SimpleNode.render 
> (SimpleNode.java:230)
> at org.apache.velocity.Template.merge(Template.java:256)
> at org.apache.velocity.texen.Generator.parse(Generator.java: 
> 426)
> at org.apache.velocity.texen.ant.TexenTask.execute 
> (TexenTask.java:519)
> at org.apache.tools.ant.UnknownElement.execute 
> (UnknownElement.java:275)
> at org.apache.tools.ant.Task.perform(Task.java:364)
> at org.apache.tools.ant.Target.execute(Target.java:341)
> at org.apache.tools.ant.Target.performTasks(Target.java:369)
> at org.apache.tools.ant.Project.executeTarget(Project.java: 
> 1214)
> at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:386)
> at org.apache.tools.ant.taskdefs.CallTarget.execute 
> (CallTarget.java:106)
> at org.apache.tools.ant.UnknownElement.execute 
> (UnknownElement.java:275)
> at org.apache.tools.ant.Task.perform(Task.java:364)
> at org.apache.tools.ant.Target.execute(Target.java:341)
> at org.apache.tools.ant.Target.performTasks(Target.java:369)
> at org.apache.tools.ant.Project.executeTarget(Project.java: 
> 1214)
> at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:386)
> at org.apache.tools.ant.UnknownElement.execute 
> (UnknownElement.java:275)
> at org.apache.tools.ant.Task.perform(Task.java:364)
> at org.apache.tools.ant.Target.execute(Target.java:341)
> at org.apache.tools.ant.Target.performTasks(Target.java:369)
> at org.apache.tools.ant.Project.executeTarget(Project.java: 
> 1214)
> at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:386)
> at org.apache.tools.ant.taskdefs.CallTarget.execute 
> (CallTarget.java:106)
> at org.apache.tools.ant.UnknownElement.execute 
> (UnknownElement.java:275)
> at org.apache.tools.ant.Task.perform(Task.java:364)
> at org.apache.tools.ant.Target.execute(Target.java:341)
> at org.apache.tools.ant.Target.performTasks(Target.java:369)
> at org.apache.tools.ant.Project.executeTarget(Project.java: 
> 1214)
> at org.apache.tools.ant.Project.executeTargets(Project.java: 
> 1062)
> at org.apache.tools.ant.Main.runBuild(Main.java:673)
> at org.apache.tools.ant.Main.startAnt(Main.java:188)
> at org.apache.tools.ant.launch.Launcher.run(Launcher.java:196)
> at org.apache.tools.ant.launch.Launcher.main(Launcher.java:55)
>


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