Sean, On 8/8/2016 7:10 AM, Sean Son wrote: > On Fri, Aug 5, 2016 at 5:34 PM, Mark Eggers <its_toas...@yahoo.com.invalid> > wrote: > >> On 8/5/2016 2:19 PM, Sean Son wrote: >>> Hello! >>> >>> I am currently running Tomcat 8 on RHEL 7.2 with one web application >>> called AppVet (A mobile Application Vetting program). The >>> application works well but when I tried to use a script to allow >>> tomcat to start up at boot, the webapp gives an authentication error. >>> I saw the following error in the logs for appvet: >>> >>> >>> [ERROR] Could not connect to database: >>> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: >>> Communications link failure >>> >>> The last packet sent successfully to the server was 0 milliseconds >>> ago. The driver has not received any packets from the server. Make >>> sure your MySQL password in your AppVetProperties.xml file is >>> correct >>> >>> >>> I know for a fact that the MySQL password is correct in that XML >>> file. I double checked it already. Any ideas on how I should fix >>> this error? >>> >>> This is the script that I am using for startup/shutdown of Tomcat8 on >>> boot: >>> >>> http://pastebin.com/mrvfDtTD >>> >>> Thanks! >>> >>> Sean >>> >> >> It appears that your Tomcat process is running as root. Do not do this. >> >> Is your MySQL server up and running before Tomcat is started? >> >> . . . just my two cents >> /mde/ >> >> > Hello thank you for your response > > I created a user account for Tomcat, I will set the script to use that > account instead of the root account. Question though, does this account > need a password?
Yes, especially since you'll be running a service. Note that if you're running Tomcat on a privileged port (less than 1024), a non-root account will not be able to bind to this port. You have three choices. 1. iptables route port 80 to port 8080 (Tomcat default) internally. Take a look at the iptables documentation. 2. jsvc jsvc from the Apache Commons Daemon project allows you to run a service such as Tomcat more easily. I don't remember if there is an RPM for RHEL or not (possible in EPEL). It's configuration and startup script are different, but the documentation is a good start (there are Tomcat examples). https://commons.apache.org/proper/commons-daemon/jsvc.html 3. Apache HTTPD front end with mod_proxy_ajp or mod_jk I'd do this if you need Apache HTTPD for other web applications (a PHP application, perhaps). There is good documentation available on the Tomcat web site, as well as a ton of discussion on the mailing list to get this running. If you don't feel like building software, I'd recommend mod_proxy_ajp. I find mod_jk more flexible and a little easier to use (opinions on easy of use vary), but you'd have to build mod_jk from source. It's easy to do, but some people find that a little more challenging. > > Also, I cant tell if the MySQL server is up and running prior to Tomcat > being started. I know that mysqld is enabled to start at boot, but I dont > know if Tomcat starts prior to MySQL. How would I figure that out? > I thought REHL 7 uses systemd and not init scripts? There have been many discussions on the mailing list concerning systemd and Tomcat. I think someone has posted appropriate systemd scripts. If not, then look at /etc/rc3.d. Start and stop scripts are executed in numerical order. Start scripts start with S, stop scripts start with K. Adjust the numbers in your Tomcat init script (/etc/initinit.d) so that the start comes after MySQL (second number in the chkconfig line). You'll have to chkconfig --del and chkconfig --add to have the new numbers take effect in /etc/rcx.d. > > Thanks! > . . . just my two cents /mde/
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