[Deploying Sakai] Can't log in with clustering

Kusnetz, Jeremy JKusnetz at APUS.EDU
Wed Mar 17 15:41:14 PDT 2010

I'm new to Sakai and I'm trying to get a load balanced cluster working.


I'm running 2 servers, each with their own tomcat and apache using


Sakai 2.6.2

Tomcat 5.5.28

Java 1.5.0_21-b01

Apache 2.2.3

MySQL 5.1.44


When running just one tomcat I can log in as administrator just fine,
hitting either apache server.  As soon as both tomcats are running when
I log in I just get sent right back to the main portal home page.


The sakai.properties file is fairly clean from the default other than
configuring it to use MySQL and a filesystem storage on an NFS server.


I added the following to the properties file, but it doesn't seem to
make a difference (I guessed on the values)


expired at org.sakaiproject.cluster.api.ClusterService=20

ghostingPercent at org.sakaiproject.cluster.api.ClusterService=10

refresh at org.sakaiproject.cluster.api.ClusterService=10


The apache configs look like (I'm doing compression and redirecting to
port https and rewriting to /portal):



# mod_deflate (compress output for browsers that support it)

AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css
application/x-javascript text/javascript text/x-js application/json
application/xml application/javascript


# Some adjustments for IE browsers (c/f


BrowserMatch ^Mozilla/4 gzip-only-text/html

BrowserMatch ^Mozilla/4\.0[678] no-gzip

BrowserMatch \bMSIE\s7 !no-gzip !gzip-only-text/html

BrowserMatch \bMSIE\s8 !no-gzip !gzip-only-text/html


<VirtualHost *:80>

        ServerName testcentos1.amunet.edu

        ServerAlias testcentos1

        RewriteEngine on

        RewriteCond %{SERVER_PORT} !^443$

        RewriteRule ^(.*)$ https://%{SERVER_NAME}$1 [L,R]



<VirtualHost *:443>

        ServerName testcentos1.amunet.edu

        ServerAlias testcentos1

        #SSLEngine ON

        SSLProxyEngine ON

        SSLCertificateFile /etc/httpd/conf/ssl.crt/server.crt

        SSLCertificateKeyFile /etc/httpd/conf/ssl.key/server.key

        SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown


        RewriteEngine on

        RewriteRule ^/$ /portal/ [L,P]


        ProxyPass / balancer://sakaiCluster/  stickysession=JSESSIONID

        ProxyPassReverse / balancer://sakaiCluster/


        <Proxy balancer://sakaiCluster>

                BalancerMember ajp://

                BalancerMember ajp://



        <Proxy *>

                Order deny,allow

                Allow from all





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