How to fix "PegaRULES initialization failed. Server: unknown"

Question

I'm setting up a new server for pega application. While starting the JVM, i'm facing below error. please help on below.

Version

apache_tomcat = 5.5.17
java = 1.5.0_22
OS = Linux

Is there any configuration need to be added?

Error

2018-12-20 09:38:33,101 [ main] [ ] [ ] ( etier.engine.EngineStartup) ERROR - PegaRULES initialization failed. Server: unknown com.pega.pegarules.pub.database.ConnectionException: Database-General Problem encountered when getting connection for database pegarules 0 Cannot load JDBC driver class 'oracle.jdbc.OracleDriver' From: (unknown) Caused by SQL Problems. Problem #1, SQLState null, Error code 0: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'oracle.jdbc.OracleDriver' at com.pega.pegarules.engine.database.ExceptionInformation.createExceptionDueToDBFailure(ExceptionInformation.java:146) at com.pega.pegarules.engine.database.ConnectionManager.getConnection(ConnectionManager.java:1108) at com.pega.pegarules.engine.database.ConnectionManager.getConnection(ConnectionManager.java:783) at com.pega.pegarules.engine.database.ConnectionManager.rebuildDBNameDefinitions(ConnectionManager.java:1970) at com.pega.pegarules.engine.database.ConnectionManager.(ConnectionManager.java:462) at com.pega.pegarules.engine.database.ConnectionManager.getInstance(ConnectionManager.java:560) at com.pega.pegarules.etier.engine.EngineStartup.initEngine(EngineStartup.java:393) at com.pega.pegarules.etier.impl.EngineImpl._initEngine_privact(EngineImpl.java:125) at com.pega.pegarules.etier.impl.EngineImpl.doStartup(EngineImpl.java:98) at com.pega.pegarules.web.servlet.WebAppLifeCycleListener.contextInitialized(WebAppLifeCycleListener.java:203) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3729) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4187) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:809) at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:698) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:472) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021) at org.apache.catalina.core.StandardHost.start(StandardHost.java:718) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442) at org.apache.catalina.core.StandardService.start(StandardService.java:450) at org.apache.catalina.core.StandardServer.start(StandardServer.java:709) at org.apache.catalina.startup.Catalina.start(Catalina.java:551) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:592) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432) Caused by: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class 'oracle.jdbc.OracleDriver' at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:766) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:540) at com.pega.pegarules.engine.database.DataSourceManager.getConnection(DataSourceManager.java:251) at com.pega.pegarules.engine.database.DatabaseConnection.activate(DatabaseConnection.java:1113) at com.pega.pegarules.engine.database.ConnectionManager.getConnection(ConnectionManager.java:1077) ... 32 more Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:164) at org.apache.tomcat.dbcp.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:760) ... 36 more 2018-12-20 09:38:33,101 [ main] [ ] [ ] ( etier.engine.EngineStartup) INFO - PegaRULES initialization failed. Server: unknown

Answer 1

There could be three reasons or others..

1) JDK version is not correct --> I will recommend to use JDK 1.8

2) Database service is not running --> I am not sure how you check active services in Linux

3) Database JDBC jar file is not copied to tomcat's lib folder

4) JVM memory allotted is not enough --> Allot at-least 4 GB

Please go through the installation guide. https://community.pega.com/system/files/pdfs/ProductSupport/Products/PegaRULESProcessCommander/documents/PRPC/V5/503/PRPC5-3_J2EE_Install_Guide_Tomcat.pdf