0002427: Random 503 error codes from mod_caucho

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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.

Additional Information

Attached Files

Relationships

Notes
(0003061) ferg 05-13-08 09:20	Updated error handling in libresin.so 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

Mantis 1.0.0rc3[^]

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