Mantis - Resin
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1190 major random 06-10-06 19:44 06-29-06 14:24
mpavel  
ferg  
urgent  
closed 3.0.18  
fixed  
none    
none 3.0.20  
0001190: random 503 error codes
Have the following configuration: 4 RedHat AS 2.1 servers running apache 2.0.48 on the front-end (mod_caucho) and 2 RedHat AS 4.0 servers running resin 3.0.18 on the backend.

We recently upgraded from resin 2.1.5 to 3.0.18 and started seing random 503 errors in apache logs. The errors do not seem to be correlated to load on the servers or any specific activity.

Any help would be appreciated.
from resin.conf on the backend:

  <thread-pool>
    <!-- Maximum number of threads. -->
    <thread-max>400</thread-max>

    <!-- Minimum number of spare connection threads. -->
    <spare-thread-min>25</spare-thread-min>
  </thread-pool>


    <keepalive-max>350</keepalive-max>
    <keepalive-timeout>120s</keepalive-timeout>

    <cluster>
        <client-live-time>110s</client-live-time>
        <client-read-timeout>120s</client-read-timeout>
        <client-dead-time>10s</client-dead-time>

        <srun id="a" host="10.24.217.1" port="6802" index="1" tcp-no-delay="true" read-timeout="120s"/>
        <srun id="b" host="10.24.217.2" port="6802" index="2" tcp-no-delay="true" read-timeout="120s"/>

    </cluster>


Notes
(0001286)
anonymous   
06-12-06 22:20   
We are seeing similar random 503 errors in the log with resin 3.0.18 and apache 2.0.55 (mod_caucho-3.0.18). If we hit resin directly the errors to not occur, but via apache, small things like style sheets, links stop working...
(0001348)
mkaur   
06-28-06 12:17   
We are seeing this behavior with resin 3.0.19 and apache 2.0.55 as well.
(0001356)
ferg   
06-29-06 14:24   
server/264c