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What is the role of Tomcat in Oracle 19c? aiming at this question, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Tomcat middleware is a free and open source Web application server. Oracle 12.2.0.1 started installing and using Tomcat in GI. Because Tomcat is an open source product, we must pay attention to the safety of the product when using it in a production environment. Oracle officials have also been releasing patches in a timely manner based on the information released by CVE.

Tomcat was already deployed in GI HOME when we installed and deployed the Oracle database since 12.2.

Database Release Update: 19.7.0.0.200414 (30805684) 30805684 RELEASE UPDATE 19.7.0.0.200414 (30805684) 30805684 RELEASE UPDATE 19.7.0.200414 (30805684) 30805684mitOCW RELEASE UPDATE 19.7.0.200414 (30805684) 30805684mittomcat RELEASE UPDATE 19.7.0.200414 (30805684) 30805684X update 19.7 DATABASE CLIENT JDK IN ORACLE HOME TO JDK8U17130805684;OJVM RELEASE UPDATE: 19.7.0.200414 (30805684)

Tomcat is used in these places in Oracle 19c

Oracle Quality of Service (QoS) Management-A feature in GI that manages database workloads on a given cluster.

Oracle Fleet Patching and Provisioning (FPP)-A feature in GI that standardizes and automates Oracle software configuration, patches, and upgrades. This feature was formerly known as fast Home provisioning (RHP) memory protection per node in Oracle Memory Guard-Oracle RAC.

Oracle Trace File Analyzer-Log collection tool.

The Quality of Services Management (ora.qosmserver resource) service uses Tomcat. QoS applications are deployed in Tomcat and consist of mbean, REST services, and Servlet. If QoS is a secure application, the Tomcat distribution provided with GI is customized, not in the Tomcat code itself, but when using Tomcat features. This improves the use of containers and makes them more reliable and secure. The following are enhancements to Tomcat when deploying Tomcat using GI.

$ps-eaf | grep tomcatgrid 58746 142151 0 13:10 pts/1 00:00:00 grep-- color=auto tomcatgrid 108610 10 Dec04? 00:25:33 / u01/19.7.0/grid/jdk/bin/java-server-Xms128M-Xmx384M-Djava.awt.headless=true-Ddisable.checkForUpdate=true-Djava.util.logging.config.file=/u01/app/grid/crsdata/node1/qos/conf/logging.properties-Djava.util.logging.manager=org.apache. Juli.ClassLoaderLogManager-DTRACING.ENABLED=false-Djava.rmi.server.hostname=node1.cern.ch-Doracle.http.port=8888-Doracle.jmx.port=23792-Doracle.tls.enabled=false-Doracle.jwc.tls.http.enabled=false-Djava.security.manager-Djava.security.policy=/u01/app/grid/crsdata/node1/qos/conf/catalina.policy-Djava.security.egd=file:/dev/urandom-Dcatalina.home=/u01/19.7.0/grid/tomcat-Dcatalina.base=/u01/app/grid / crsdata/node1/qos-Djava.io.tmpdir=/u01/app/grid/crsdata/node1/qos/temp-Doracle.home=/u01/19.7.0/grid-classpath / u01/19.7.0/grid/ tomcat/lib/tomcat-juli.jar: / u01/19.7.0/grid/ tomcat/lib/bootstrap.jar: / u01/19.7.0/grid/jlib/jwc-logging.jar org.apache.catalina.startup.Bootstrap start

To minimize memory footprint, use only the following JAR files for Tomcat Web containers

Annotations-api.jar

Bootstrap.jar

Catalina.jar

Jaspic-api.jar

Servlet-api.jar

Tomcat-api.jar

Tomcat-coyote.jar

Tomcat-jni.jar

Tomcat-juli.jar

Tomcat-util.jar

Tomcat-util-scan.jar

According to the principle of minimum use, we can also turn off the qos service, but we need to turn it on for psu applications.

Crsctl stat res-t

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Ora.qosmserver online online

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Using grid users to execute

Srvctl status qosmserver Qos Management Server is enableQos Management Server is running on node1srvctl stop qosmserver-forcesrvctl disable qosmserver Qos Management Server is enableQos Management Server is not running on node1's answer to the question about the role of Tomcat in Oracle 19c is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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