Failed to instantiate [ch.qos.logback.classic.LoggerContext]
Reported exception:
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '50MB' with class 'java.lang.String' to class 'ch.qos.logback.core.util.FileSize'
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformatio
n.java:402)
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransforma
tion.java:316)
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:
229)
        at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:2690)
        at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:3747)
        at org.codehaus.groovy.runtime.InvokerHelper.setProperty(InvokerHelper.java:196)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setProperty(ScriptBytecodeAdapter.java:482)
        at ch.qos.logback.classic.gaffer.PropertyUtil.attach(PropertyUtil.groovy:44)
        at ch.qos.logback.classic.gaffer.PropertyUtil$attach$2.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
        at ch.qos.logback.classic.gaffer.PropertyUtil$attach$2.call(Unknown Source)
        at ch.qos.logback.classic.gaffer.ComponentDelegate.propertyMissing(ComponentDelegate.groovy:92)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
        at groovy.lang.MetaClassImpl.invokeMissingProperty(MetaClassImpl.java:878)
        at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:2722)
        at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:3747)
        at ch.qos.logback.classic.gaffer.ComponentDelegate.setProperty(ComponentDelegate.groovy)
        at org.codehaus.groovy.runtime.InvokerHelper.setProperty(InvokerHelper.java:192)
        at groovy.lang.Closure.setPropertyTryThese(Closure.java:388)
        at groovy.lang.Closure.setPropertyDelegateFirst(Closure.java:378)
        at groovy.lang.Closure.setProperty(Closure.java:359)
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setGroovyObjectProperty(ScriptBytecodeAdapter.java:530)
        at logback$_run_closure1$_closure8.doCall(logback.groovy:53)
        at logback$_run_closure1$_closure8.doCall(logback.groovy)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:292)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1017)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:54)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
        at ch.qos.logback.classic.gaffer.ComponentDelegate.methodMissing(ComponentDelegate.groovy:64)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
        at groovy.lang.MetaClassImpl.invokeMissingMethod(MetaClassImpl.java:934)
        at groovy.lang.MetaClassImpl.invokePropertyOrMissing(MetaClassImpl.java:1257)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1210)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1017)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:808)
        at ch.qos.logback.classic.gaffer.ComponentDelegate.invokeMethod(ComponentDelegate.groovy)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeOnDelegationObjects(ClosureMetaClass.java:428)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:369)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1017)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:66)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:149)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:169)
        at logback$_run_closure1.doCall(logback.groovy:52)
        at logback$_run_closure1.doCall(logback.groovy)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)
        at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:292)
        at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1017)
        at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
        at ch.qos.logback.classic.gaffer.ConfigurationDelegate.appender(ConfigurationDelegate.groovy:211)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
        at org.codehaus.groovy.runtime.metaclass.MixinInstanceMetaMethod.invoke(MixinInstanceMetaMethod.java:53)
        at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoMetaMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMet
hodSite.java:248)
        at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:56)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:149)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:177)
        at logback.run(logback.groovy:45)
        at logback$run.call(Unknown Source)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
        at ch.qos.logback.classic.gaffer.GafferConfigurator.run(GafferConfigurator.groovy:60)
        at ch.qos.logback.classic.gaffer.GafferUtil.runGafferConfiguratorOn(GafferUtil.java:43)
        at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:67)
        at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:150)
        at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:84)
        at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55)
        at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
        at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
        at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412)
        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357)
        at org.apache.log4j.Category.<init>(Category.java:57)
        at org.apache.log4j.Logger.<init>(Logger.java:37)
        at org.apache.log4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:43)
        ...