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application.org.apache.avalon.framework.component.ComponentException: Unable to initialize the ComponentManager (key [org.apache.cocoon.Processor])

    at org.ametys.runtime.cocoon.TreeProcessor.compose(TreeProcessor.java:94)
    at org.apache.avalon.framework.container.ContainerUtil.compose(ContainerUtil.java:173)
    at org.apache.avalon.excalibur.component.DefaultComponentFactory.newInstance(DefaultComponentFactory.java:266)
    at org.apache.avalon.excalibur.component.ThreadSafeComponentHandler.initialize(ThreadSafeComponentHandler.java:108)
    at org.apache.avalon.excalibur.component.ExcaliburComponentManager.initialize(ExcaliburComponentManager.java:524)
    at org.apache.cocoon.components.CocoonComponentManager.initialize(CocoonComponentManager.java:583)
    at org.apache.avalon.framework.container.ContainerUtil.initialize(ContainerUtil.java:244)
    at org.apache.cocoon.Cocoon.initialize(Cocoon.java:345)
    at org.apache.avalon.framework.container.ContainerUtil.initialize(ContainerUtil.java:244)
    at org.apache.cocoon.servlet.CocoonServlet.createCocoon(CocoonServlet.java:1435)
    at org.ametys.runtime.servlet.RuntimeServlet.createCocoon(RuntimeServlet.java:225)
    at org.ametys.runtime.servlet.RuntimeServlet._doService(RuntimeServlet.java:145)
    at org.ametys.runtime.servlet.RuntimeServlet.service(RuntimeServlet.java:92)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: org.apache.avalon.framework.configuration.ConfigurationException: Specified driver class does not exist
    at org.ametys.runtime.datasource.DataSourceExtensionPoint.addExtension(DataSourceExtensionPoint.java:65)
    at org.ametys.runtime.plugin.PluginsManager._loadExtensions(PluginsManager.java:1077)
    at org.ametys.runtime.plugin.PluginsManager._loadFeatures(PluginsManager.java:1030)
    at org.ametys.runtime.plugin.PluginsManager.initExtensions(PluginsManager.java:472)
    at org.ametys.runtime.cocoon.TreeProcessor.compose(TreeProcessor.java:65)
    ... 29 more
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:186)
    at org.ametys.runtime.datasource.DataSourceExtensionPoint.addExtension(DataSourceExtensionPoint.java:61)
    ... 33 more