Fix Tomcat memory leak when deploying

[kenners]

Probably needs something like this in /conf/web.xml file under in the JSP servlet definition:

<init-param>
    <param-name>enablePooling</param-name>
    <param-value>false</param-value>
</init-param>

More details at https://wiki.openmrs.org/display/docs/Troubleshooting+Memory+Errors

[andrewlkho]

This already appears to be set in our base AMI (see lines 262-265 of /opt/tomcat6/conf/web.xml).

[andrewlkho]

Actually, this is not the default in tomcat 6.0.29. @kenners can you please outline the steps you took (customisations) that resulted in the tomcat install in the AMI?

[kenners]

Yep, sure. Essentially, applied the following patch to the default conf/web.xml file:

diff --git a/web.xml b/web.xml
index e2b60ac..246cb9f 100644
--- a/web.xml
+++ b/web.xml
@@ -259,7 +259,11 @@
             <param-name>xpoweredBy</param-name>
             <param-value>false</param-value>
         </init-param>
-        <load-on-startup>3</load-on-startup>
+   <init-param>
+       <param-name>enablePooling</param-name>
+       <param-value>false</param-value>
+   </init-param>     
+   <load-on-startup>3</load-on-startup>
     </servlet>

I've also provided a Gist with the default and patched version of web.xml.

[andrewlkho]

Documented in the kasha wiki.