We recently moved to Tomcat from WebSphere for our application.
We are using: JDK 1.8 Build 191 and Tomcat 9.0.50. Most of the application is a mix Servlet/JSP and a few webapps with Spring MVC, it does use some multithreading
Now our test servers deploy absolutely fine. Its pretty zippy. But when deploying on Tomcat on Production, it just comes to a screeching halt.
For Example, This is an output from the Test Server:
26-Aug-2021 08:56:11.585 INFO [main] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive [/opt/app/tomcat/webapps/cdsrs.war]
26-Aug-2021 08:56:13.750 INFO [main] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
26-Aug-2021 08:56:14.091 INFO [main] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive [/opt/app/tomcat/webapps/cdsrs.war] has finished in [2,505] ms
And this is the same webapp on Production:
26-Aug-2021 09:26:18.016 INFO [Catalina-utility-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/opt/app/tomcat/webapps/cdsrs]
26-Aug-2021 09:26:19.870 INFO [Catalina-utility-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
26-Aug-2021 09:28:52.569 INFO [Catalina-utility-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/opt/app/tomcat/webapps/cdsrs] has finished in [154,553] ms
I have this set on setenv.sh file:
export CATALINA_OPTS="$CATALINA_OPTS -XX:+PrintGCTimeStamps -XX:+PrintGCDetails -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCApplicationConcurrentTime -XX:+PrintHeapAtGC -Xloggc:gc/gc.log"
export CATALINA_OPTS="$CATALINA_OPTS -Xms3072M"
export CATALINA_OPTS="$CATALINA_OPTS -Xmx8192M"
export CATALINA_OPTS="$CATALINA_OPTS -XX:MaxPermSize=3072M"
And I have configured my server.xml with:
<Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol" maxHttpHeaderSize="65536" maxThreads="150" SSLEnabled="true" acceptorThreadCount="4" >
<SSLHostConfig>
<Certificate certificateKeystoreFile="conf/keystore.jks" certificateKeystorePassword="some_password" type="RSA" />
</SSLHostConfig>
</Connector>
<Connector address="SERVER_HOSTNAME" port="8080" protocol="HTTP/1.1" maxHttpHeaderSize="65536" connectionTimeout="20000" redirectPort="8443" acceptorThreadCount="4" />
And the Engine tag like:
<Engine name="Catalina" defaultHost="localhost" startStopThreads="0">
Not to mention, the app runs very slow on it too! The page load times are gone up by about 200-300% now compared to when it ran on WebSphere. Am I missing something here? Some help on this would be really appreciated. Thanks!
0 Answers