Re: Reading too many Files into Array returns Nil
Re: Reading too many Files into Array returns Nil
- Subject: Re: Reading too many Files into Array returns Nil
- From: John Stiles <email@hidden>
- Date: Mon, 12 Sep 2005 23:07:28 -0700
Once you have more than a few hundred open file handles, the system
starts to refuse to open more files.
Your options:
- close your files when you're done with them! Maybe you just need an
autorelease pool around your file opening code.
- use setrlimit to raise the limit to the maximum open file limit (there
appears to be no downside to this, so I don't know why it isn't the default)
In every non-trivial program I've worked on for OS X, I've always needed
the setrlimit code eventually. There's always /something/ that ends up
blowing the limit.
Oh, and for some reason the debugger turns off the resource limit. Not
sure why that is, but it's really frustrating since it makes the problem
more difficult to debug until you realize what's going on. :|
Mike Oldham wrote:
New cocoa Developer, and new to the list, so bear with me.
I'm reading files with NSFileHandle.
The number of files is never the same.
When reading a few files, everything works fine.
When reading several hundred I get this Error.
2005-09-12 22:59:27.111 ArtiX[4388] An uncaught exception was raised
2005-09-12 22:59:27.111 ArtiX[4388] *** -[NSCFArray addObject:]:
attempt to insert nil
2005-09-12 22:59:27.111 ArtiX[4388] *** Uncaught exception:
<NSInvalidArgumentException> *** -[NSCFArray addObject:]: attempt to
insert nil
Here is the read code.
LargeFile = [NSFileHandle fileHandleForReadingAtPath:fString];
tmpData = [LargeFile readDataOfLength:4];
tmpStringName = [LargeFile readDataOfLength:32];
tmpData = [LargeFile readDataOfLength:4];
tmpTagName = [LargeFile readDataOfLength:4];
[ProjStringName addObject:tmpStringName];
[ProjTagName addObject:tmpTagName];
[ProjTagPosition addObject:[NSNumber numberWithInt:-1]];
[ProjTagLength addObject:fString];
The weird thing is, when i run in debug mode it works fine.
Any ideas?
Mike
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