RE: [Simpleweb-Support] Simple Stability...
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RE: [Simpleweb-Support] Simple Stability...
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From: Gail R. F. <ga...@sc...> - 2005-08-26 15:59:02
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All, My Linux server is: Red Hat Enterprise Linux ES release 3 (Taroon Update 5) 2.4.21-9.0.1.EL - Gail. -----Original Message----- From: sim...@li... [mailto:sim...@li...] On Behalf Of Jan Mikkelsen Sent: Friday, August 26, 2005 7:50 AM To: sim...@li... Subject: RE: [Simpleweb-Support] Simple Stability... Gail, please run 'cat /etc/redhat-release' and 'uname -a' Thanks! -----Original Message----- From: sim...@li... [mailto:sim...@li...] On Behalf Of Gail Rahn Frederick Sent: 26. august 2005 16:40 To: sim...@li... Subject: RE: [Simpleweb-Support] Simple Stability... Hi Jan, The quick answer is I'm not sure. I'm not a Linux expert, so I paid Red Hat for a subscription that automatically updates the OS. I started with Enterprise Linux 3 ES. After 2 hours of Red Hat's automatic updates, I ran Simple again and the CLOSE_WAIT problem was gone. I have been running a stable Simple ever since. I believe the kernel is still 2.4.x. But if you give me a shell command that displays the kernel version, I'm happy to run it and provide you exact version. - Gail. ---------------------- Gail Rahn Frederick ga...@sc... 503.260.0910 Screaming Geek Software www.screaminggeek.com -----Original Message----- From: sim...@li... [mailto:sim...@li...] On Behalf Of Jan Mikkelsen Sent: Friday, August 26, 2005 12:36 AM To: sim...@li... Subject: RE: [Simpleweb-Support] Simple Stability... Hi Gail Did you update to a newer version of 2.4.x or to 2.6.x ? Is there any way to check if my 2.4.x kernel has this bug ? Thanks, Jan -----Original Message----- From: sim...@li... [mailto:sim...@li...] On Behalf Of Gail Rahn Frederick Sent: 9. august 2005 02:26 To: sim...@li... Subject: [Simpleweb-Support] Simple Stability... Hi Niall and everyone, As you know, I have been testing Simple for the past few weeks, trying to track down a TCP error that was causing my instance to eventually hang all worker threads, even under light loads. I previously suggested a tweak to the Socket configuration (setting a SO_LINGER timeout). In the end, we found spotty documentation about a Linux 2.4.x kernel bug that can cause sockets closed properly by the application to linger indefinitely in CLOSE_WAIT. Updating our Red Hat distribution via Red Hat Network (we paid for this service) resulted in the problem completely going away. I was more than surprised to find an OS bug to be at fault! Along the way, I replaced Niall's synchronization and thread-pooling code with the new JDK 5 constructs from the new and wonderful package java.util.concurrent. I proved that Niall's software was correct (because we saw the same deadlocks with the JDK 5 constructs, which have already been proven correct). But, the migration to java.util.concurrent seems to make a faster Simple. I'm happy to contribute back the port to java.util.concurrent, it simplifies the code... -- Gail. ------------- Gail Rahn Frederick ga...@sc... 503.260.0910 ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ Simpleweb-Support mailing list Sim...@li... https://lists.sourceforge.net/lists/listinfo/simpleweb-support ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ Simpleweb-Support mailing list Sim...@li... https://lists.sourceforge.net/lists/listinfo/simpleweb-support ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ Simpleweb-Support mailing list Sim...@li... https://lists.sourceforge.net/lists/listinfo/simpleweb-support ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ Simpleweb-Support mailing list Sim...@li... https://lists.sourceforge.net/lists/listinfo/simpleweb-support |
