A network service error has occurred.
method: [unknown]
msg: system failure: java.lang.NoClassDefFoundError: Could not initialize class com.zimbra.cs.fb.FreeBusyProvider
code: service.FAILURE
detail: soap:Receiver
trace: qtp364604394-242:1655963565695:48491be25bc19728
WARNING: Initial attempt to create application context was unsuccessful.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cxf' defined in class path resource [META-INF/cxf/cxf.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.cxf.bus.spring.SpringBus]: Constructor threw exception; nested exception is org.apache.cxf.bus.extension.ExtensionException: Could not load extension class org.apache.cxf.common.util.ASMHelperImpl.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1303)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1197)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:847)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
at org.apache.cxf.bus.spring.BusApplicationContext$1.run(BusApplicationContext.java:107)
at org.apache.cxf.bus.spring.BusApplicationContext$1.run(BusApplicationContext.java:105)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:569)
at org.apache.cxf.bus.spring.BusApplicationContext.<init>(BusApplicationContext.java:105)
at org.apache.cxf.bus.spring.SpringBusFactory.createApplicationContext(SpringBusFactory.java:157)
at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:148)
at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:122)
at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:94)
at org.apache.cxf.bus.spring.SpringBusFactory.createBus(SpringBusFactory.java:83)
at org.apache.cxf.BusFactory.getDefaultBus(BusFactory.java:107)
at org.apache.cxf.BusFactory.createThreadBus(BusFactory.java:243)
at org.apache.cxf.BusFactory.getThreadDefaultBus(BusFactory.java:227)
at org.apache.cxf.jaxws.ServiceImpl.initialize(ServiceImpl.java:134)
at org.apache.cxf.jaxws.ServiceImpl.<init>(ServiceImpl.java:128)
at org.apache.cxf.jaxws.spi.ProviderImpl.createServiceDelegate(ProviderImpl.java:82)
at javax.xml.ws.Service.<init>(Service.java:112)
at com.microsoft.schemas.exchange.services._2006.messages.ExchangeService.<init>(Unknown Source)
at com.zimbra.cs.fb.ExchangeEWSFreeBusyProvider.<clinit>(ExchangeEWSFreeBusyProvider.java:155)
at com.zimbra.cs.fb.FreeBusyProvider.<clinit>(FreeBusyProvider.java:321)
at com.zimbra.cs.fb.FreeBusyProvider$Listener.notify(FreeBusyProvider.java:57)
at com.zimbra.cs.mailbox.MailboxListener.notifyListeners(MailboxListener.java:124)
at com.zimbra.cs.mailbox.Mailbox.commitCache(Mailbox.java:10110)
at com.zimbra.cs.mailbox.Mailbox.endTransaction(Mailbox.java:9819)
at com.zimbra.cs.mailbox.Mailbox.snoozeCalendarItemAlarm(Mailbox.java:5279)
at com.zimbra.cs.service.mail.SnoozeCalendarItemAlarm.handle(SnoozeCalendarItemAlarm.java:80)
at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEngine.java:646)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.java:491)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.java:278)
at com.zimbra.soap.SoapServlet.doWork(SoapServlet.java:308)
at com.zimbra.soap.SoapServlet.doPost(SoapServlet.java:217)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at com.zimbra.cs.servlet.ZimbraServlet.service(ZimbraServlet.java:214)
Caused by: java.lang.IncompatibleClassChangeError: class org.apache.cxf.common.util.ASMHelperImpl can not implement org.apache.cxf.common.util.ASMHelper, because it is not an interface (org.apache.cxf.common.util.ASMHelper is in unnamed module of loader org.eclipse.jetty.webapp.WebAppClassLoader @24f360b2
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
at java.base/java.net.URLClassLoader.defineClass(URLClassLoader.java:524)
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:427)
at java.base/java.net.URLClassLoader$1.run(URLClassLoader.java:421)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:420)
at org.eclipse.jetty.webapp.WebAppClassLoader.foundClass(WebAppClassLoader.java:642)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadAsResource(WebAppClassLoader.java:615)
at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:529)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
at org.apache.cxf.bus.extension.Extension.tryClass(Extension.java:164)
... 128 more
Had time to look at this again today and found the issue. Patch installation upgraded Apache CXF components but left all old libraries lying around. Fixed by moving the old cxf*3.3.4 libraries and restarting the services.
As there also had been some posts regarding the Java mailboxd options that are to be applied after patching, the following options are the one's that I'm currently using successfully