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ID Category Severity Reproducibility Date Submitted Last Update
0002427 [Resin] major always 02-11-08 18:21 05-13-08 09:20
Reporter jonathant View Status public  
Assigned To ferg
Priority normal Resolution fixed  
Status closed   Product Version 3.0.24
Summary 0002427: Random 503 error codes from mod_caucho
Description Our traffic continues to increase placing more load on our Apaches and Resin servers. We have noticed a marked increase in the number of 503 errors reported by users and started tailing the access log. We were generating something on the order of 50-100 503 errors per minute. We tried tuning a bunch of things on the backend like thread pools, etc. thinking there may have been some chance of being the problem, but it made no difference. We could achieve 503 error within about 1-2 minutes of restarting apache. The only thing that solved the problem was disabling the native socket libraries used by resin. As soon as we moved the .so files in libexec out of the way and restarted the application the problem completely stopped.

Our resin servers all run on quad CPU Ubuntu 7.04 x86-64
Our front end web servers run mod_caucho w/ Apache 2.0 and Apache 2.2 and both versions were experiencing the error.
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- Notes
05-13-08 09:20

Updated error handling in to avoid false end of file errors.

- Issue History
Date Modified Username Field Change
02-11-08 18:21 jonathant New Issue
02-25-08 17:04 briandeng Issue Monitored: briandeng
05-13-08 09:20 ferg Note Added: 0003061
05-13-08 09:20 ferg Assigned To  => ferg
05-13-08 09:20 ferg Status new => closed
05-13-08 09:20 ferg Resolution open => fixed
05-13-08 09:20 ferg Fixed in Version  => 3.1.6

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