Archive for May, 2007

Java File Descriptor Leak

Thursday, May 31st, 2007

I’ve encountered issues similar this bug:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6246565
and have found some other bug entries in the past that seem to cover the same problem.

If I’m running a lot of Runtime.getRuntime().exec() or Axis SOAP calls java open several pipes associated with each exec or SOAP call, that especially under a heavily loaded system, can take a very long time to be garbage collected. This has lead to a case where this code hits the default 1024 open file limit in a case where only maybe 20 or 30 files should be open at a time. The solution thus far has been be more careful about opening sockets and pipes in Java, but I have yet to find a better solution. I’m still running Java 5 JDK 1.5 and many of the bug entries seem to recommend upgrading to Java 6.

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Offline usage of PHP PEAR packages

Wednesday, May 30th, 2007

Reading through the documentation on PEAR, I was stumped as to how to add a channel offline. Running:

pear channel-discover pear.symfony-project.com

Would try to download http://pear.symfony-project.com/channel.xml which happened to be down for the weekend. Desperately I could not figure out how to make channel-discover read from a file. But then I finally figured out this:

pear channel-add channel.xml

Will do the trick. After running wget http://pearn.symfony-project.com/channel.xml to download the xml file you can then add it offline with the above command. To install the package offline:

pear install symfony-1.02.tgz

After you have downloaded the PEAR package as a tgz file.

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