Cannot Connect to RDS (AWS) Oracle DB

I have been trying to connect to an RDS Oracle DB from a RHEL EC2 instance, and it fails every time.

Followed this: https://docs.camunda.org/manual/7.10/installation/full/tomcat/manual/
Downloaded and put the correct ojdbc7.jar in /camunda/server/apache-tomcat-9.0.5/lib, and $TOMCAT_HOME/lib
In server.xml:
<Resource name=“jdbc/ProcessEngine”
auth=“Container”
type=“javax.sql.DataSource”
factory=“org.apache.tomcat.jdbc.pool.DataSourceFactory”
uniqueResourceName=“process-engine”
driverClassName=“oracle.jdbc.OracleDriver”
factory=“org.apache.tomcat.jdbc.pool.DataSourceFactory”
url=“jdbc:oracle:thin:@connect-non-prod.abcdefg.us-gov-west-1.rds.amazonaws.com:1521:myoracledb”
defaultTransactionIsolation=“READ_COMMITTED”
username=“username”
password=“password”
maxTotal=“20”
minIdle=“5”

The Security Group is open to the DB on port 1521.
The RDS DB and the RHEL instance are in the same subnet, and all traffic is allowed in the subnet.

AND - I can connect successfully using sqlplus64.

When I run systemctl start tomcat, it starts then fails:
Jun 17, 2019 12:32:09 PM org.apache.tomcat.util.digester.Digester endElement
WARNING: No rules found matching ‘Server/Service/Resource’.
Jun 17, 2019 12:32:09 PM org.apache.tomcat.util.digester.Digester endElement
WARNING: No rules found matching ‘Server/Service/Resource’.
Jun 17, 2019 12:32:09 PM org.apache.tomcat.util.digester.Digester endElement
WARNING: No rules found matching ‘Server/Service/Engine/Cluster/distributable’.
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server version: Apache Tomcat/7.0.76
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server built: Feb 18 2019 14:35:39 UTC
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Server number: 7.0.76.0
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Name: Linux
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: OS Version: 3.10.0-957.12.2.el7.x86_64
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Architecture: amd64
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Java Home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.212.b04-0.el7_6.x86_64/jre
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Version: 1.8.0_212-b04
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: JVM Vendor: Oracle Corporation
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_BASE: /usr/share/tomcat
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: CATALINA_HOME: /usr/share/tomcat
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.base=/usr/share/tomcat
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Dcatalina.home=/usr/share/tomcat
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.endorsed.dirs=
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.io.tmpdir=/var/cache/tomcat/temp
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.util.logging.config.file=/usr/share/tomcat/conf/logging.properties
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.VersionLoggerListener log
INFO: Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
Jun 17, 2019 12:32:09 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/lib/oracle/12.1/client64/lib:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
Jun 17, 2019 12:32:09 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler [“http-bio-8080”]
Jun 17, 2019 12:32:09 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler [“ajp-bio-8009”]
Jun 17, 2019 12:32:09 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 986 ms
Jun 17, 2019 12:32:10 PM org.apache.tomcat.jdbc.pool.ConnectionPool init
SEVERE: Unable to create initial connections of pool.
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:743)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:666)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:566)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:727)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:661)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:479)
at org.apache.tomcat.jdbc.pool.ConnectionPool.(ConnectionPool.java:156)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:103)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.createDataSource(DataSourceFactory.java:554)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:242)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:141)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
at org.apache.naming.NamingContext.lookup(NamingContext.java:848)
at org.apache.naming.NamingContext.lookup(NamingContext.java:159)
at org.apache.naming.NamingContext.lookup(NamingContext.java:836)
at org.apache.naming.NamingContext.lookup(NamingContext.java:173)
at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1110)
at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:689)
at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:273)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:750)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:470)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:506)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:595)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:230)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1452)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:496)
… 33 more
Caused by: java.net.ConnectException: Permission denied (connect failed)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:161)
at oracle.net.nt.ConnOption.connect(ConnOption.java:159)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:428)
… 38 more

Jun 17, 2019 12:32:10 PM org.apache.naming.NamingContext lookup
WARNING: Unexpected exception resolving reference
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:743)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:666)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:566)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:727)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:661)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:479)
at org.apache.tomcat.jdbc.pool.ConnectionPool.(ConnectionPool.java:156)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:103)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.createDataSource(DataSourceFactory.java:554)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:242)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:141)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
at org.apache.naming.NamingContext.lookup(NamingContext.java:848)
at org.apache.naming.NamingContext.lookup(NamingContext.java:159)
at org.apache.naming.NamingContext.lookup(NamingContext.java:836)
at org.apache.naming.NamingContext.lookup(NamingContext.java:173)
at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1110)
at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:689)
at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:273)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:750)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:470)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:506)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:595)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:230)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1452)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:496)
… 33 more
Caused by: java.net.ConnectException: Permission denied (connect failed)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:161)
at oracle.net.nt.ConnOption.connect(ConnOption.java:159)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:428)
… 38 more

Jun 17, 2019 12:32:10 PM org.apache.catalina.core.NamingContextListener addResource
WARNING: Failed to register in JMX: javax.naming.NamingException: IO Error: The Network Adapter could not establish the connection
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: ENGINE-08046 Found camunda bpm platform configuration in CATALINA_BASE/CATALINA_HOME conf directory [/usr/share/tomcat/conf/bpm-platform.xml] at ‘file:/usr/share/tomcat/conf/bpm-platform.xml’
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: ENGINE-12003 Plugin ‘ProcessApplicationEventListenerPlugin’ activated on process engine ‘default’
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: ENGINE-12003 Plugin ‘SpinProcessEnginePlugin’ activated on process engine ‘default’
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: SPIN-01010 Discovered Spin data format provider: org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormatProvider[name = application/json]
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: SPIN-01010 Discovered Spin data format provider: org.camunda.spin.impl.xml.dom.format.DomXmlDataFormatProvider[name = application/xml]
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: SPIN-01009 Discovered Spin data format: org.camunda.spin.impl.xml.dom.format.DomXmlDataFormat[name = application/xml]
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: SPIN-01009 Discovered Spin data format: org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormat[name = application/json]
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: ENGINE-12003 Plugin ‘ConnectProcessEnginePlugin’ activated on process engine ‘default’
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: CNCT-01004 Discovered provider for connector id ‘http-connector’ and class ‘org.camunda.connect.httpclient.impl.HttpConnectorImpl’: ‘org.camunda.connect.httpclient.impl.HttpConnectorProviderImpl’
Jun 17, 2019 12:32:10 PM org.camunda.commons.logging.BaseLogger logInfo
INFO: CNCT-01004 Discovered provider for connector id ‘soap-http-connector’ and class ‘org.camunda.connect.httpclient.soap.impl.SoapHttpConnectorImpl’: ‘org.camunda.connect.httpclient.soap.impl.SoapHttpConnectorProviderImpl’
Jun 17, 2019 12:32:11 PM org.apache.tomcat.jdbc.pool.ConnectionPool init
SEVERE: Unable to create initial connections of pool.
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:743)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:666)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:566)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:727)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:661)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:479)
at org.apache.tomcat.jdbc.pool.ConnectionPool.(ConnectionPool.java:156)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:103)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.createDataSource(DataSourceFactory.java:554)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:242)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:141)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
at org.apache.naming.NamingContext.lookup(NamingContext.java:848)
at org.apache.naming.NamingContext.lookup(NamingContext.java:159)
at org.apache.naming.NamingContext.lookup(NamingContext.java:836)
at org.apache.naming.NamingContext.lookup(NamingContext.java:173)
at org.apache.naming.SelectorContext.lookup(SelectorContext.java:156)
at javax.naming.InitialContext.lookup(InitialContext.java:417)
at org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl.initDataSource(ProcessEngineConfigurationImpl.java:1145)
at org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl.init(ProcessEngineConfigurationImpl.java:797)
at org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl.buildProcessEngine(ProcessEngineConfigurationImpl.java:761)
at org.camunda.bpm.container.impl.jmx.services.JmxManagedProcessEngineController.start(JmxManagedProcessEngineController.java:34)
at org.camunda.bpm.container.impl.jmx.MBeanServiceContainer.startService(MBeanServiceContainer.java:73)
at org.camunda.bpm.container.impl.jmx.MBeanServiceContainer.startService(MBeanServiceContainer.java:59)
at org.camunda.bpm.container.impl.deployment.StartProcessEngineStep.performOperationStep(StartProcessEngineStep.java:112)
at org.camunda.bpm.container.impl.spi.DeploymentOperation.execute(DeploymentOperation.java:116)
at org.camunda.bpm.container.impl.jmx.MBeanServiceContainer.executeDeploymentOperation(MBeanServiceContainer.java:156)
at org.camunda.bpm.container.impl.spi.DeploymentOperation$DeploymentOperationBuilder.execute(DeploymentOperation.java:212)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.deployBpmPlatform(TomcatBpmPlatformBootstrap.java:72)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.lifecycleEvent(TomcatBpmPlatformBootstrap.java:57)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:388)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:333)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:751)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:470)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:506)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:595)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:230)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1452)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:496)
… 46 more
Caused by: java.net.ConnectException: Permission denied (connect failed)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:161)
at oracle.net.nt.ConnOption.connect(ConnOption.java:159)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:428)
… 51 more

Jun 17, 2019 12:32:11 PM org.apache.naming.NamingContext lookup
WARNING: Unexpected exception resolving reference
java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:743)
at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:666)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:32)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:566)
at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:278)
at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182)
at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:727)
at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:661)
at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:479)
at org.apache.tomcat.jdbc.pool.ConnectionPool.(ConnectionPool.java:156)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116)
at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:103)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.createDataSource(DataSourceFactory.java:554)
at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:242)
at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:141)
at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:321)
at org.apache.naming.NamingContext.lookup(NamingContext.java:848)
at org.apache.naming.NamingContext.lookup(NamingContext.java:159)
at org.apache.naming.NamingContext.lookup(NamingContext.java:836)
at org.apache.naming.NamingContext.lookup(NamingContext.java:173)
at org.apache.naming.SelectorContext.lookup(SelectorContext.java:156)
at javax.naming.InitialContext.lookup(InitialContext.java:417)
at org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl.initDataSource(ProcessEngineConfigurationImpl.java:1145)
at org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl.init(ProcessEngineConfigurationImpl.java:797)
at org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl.buildProcessEngine(ProcessEngineConfigurationImpl.java:761)
at org.camunda.bpm.container.impl.jmx.services.JmxManagedProcessEngineController.start(JmxManagedProcessEngineController.java:34)
at org.camunda.bpm.container.impl.jmx.MBeanServiceContainer.startService(MBeanServiceContainer.java:73)
at org.camunda.bpm.container.impl.jmx.MBeanServiceContainer.startService(MBeanServiceContainer.java:59)
at org.camunda.bpm.container.impl.deployment.StartProcessEngineStep.performOperationStep(StartProcessEngineStep.java:112)
at org.camunda.bpm.container.impl.spi.DeploymentOperation.execute(DeploymentOperation.java:116)
at org.camunda.bpm.container.impl.jmx.MBeanServiceContainer.executeDeploymentOperation(MBeanServiceContainer.java:156)
at org.camunda.bpm.container.impl.spi.DeploymentOperation$DeploymentOperationBuilder.execute(DeploymentOperation.java:212)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.deployBpmPlatform(TomcatBpmPlatformBootstrap.java:72)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.lifecycleEvent(TomcatBpmPlatformBootstrap.java:57)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:388)
at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:333)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:751)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:470)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:506)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:595)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:230)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1452)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:496)
… 46 more
Caused by: java.net.ConnectException: Permission denied (connect failed)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:161)
at oracle.net.nt.ConnOption.connect(ConnOption.java:159)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:428)
… 51 more

Jun 17, 2019 12:32:11 PM org.apache.catalina.startup.Catalina start
SEVERE: The required Server component failed to start so Tomcat is unable to start.
org.apache.catalina.LifecycleException: Failed to start component [StandardServer[8005]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
at org.apache.catalina.startup.Catalina.start(Catalina.java:693)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:428)
Caused by: org.camunda.bpm.engine.ProcessEngineException: ENGINE-08043 Exception while performing ‘deploy BPM platform’ => ‘Start process engine default’: couldn’t lookup datasource from java:jdbc/ProcessEngine: IO Error: The Network Adapter could not establish the connection
at org.camunda.bpm.container.impl.ContainerIntegrationLogger.exceptionWhilePerformingOperationStep(ContainerIntegrationLogger.java:312)
at org.camunda.bpm.container.impl.spi.DeploymentOperation.execute(DeploymentOperation.java:132)
at org.camunda.bpm.container.impl.jmx.MBeanServiceContainer.executeDeploymentOperation(MBeanServiceContainer.java:156)
at org.camunda.bpm.container.impl.spi.DeploymentOperation$DeploymentOperationBuilder.execute(DeploymentOperation.java:212)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.deployBpmPlatform(TomcatBpmPlatformBootstrap.java:72)
at org.camunda.bpm.container.impl.tomcat.TomcatBpmPlatformBootstrap.lifecycleEvent(TomcatBpmPlatformBootstrap.java:57)

    ... 24 more

… (had to cut off in order to post)

I have been fighting with this for days. I know absolutely nothing about Oracle, Tomcat, Java… But I was hoping that by just following the document, I could get it to work.

Any help would be appreciated.