Hi,
I think I did everything correctly (installed the rule engine add-on via PaperUI, created the directory structure as shown in the openhab-helper-libraries repository and changed /etc/openhab2/defaults to match the directories). Nevertheless as soon as I restart openHAB 2.5.9 my log gets flooded every second with these two errors:
PS: I already cleaned the cache but the error persists. As soon as I remove the /etc/openhab2/automation directory and restart, everything gets back to normal
2020-10-09 10:22:29.453 [ERROR] [b.core.service.AbstractActiveService] - Error while executing background thread HTTP Refresh Service
java.lang.NullPointerException: null
at org.openhab.core.transform.TransformationHelper$TransformationServiceDelegate.transform(TransformationHelper.java:69) ~[bundleFile:?]
at org.openhab.binding.http.internal.HttpBinding.execute(HttpBinding.java:218) ~[?:?]
at org.openhab.core.binding.AbstractActiveBinding$BindingActiveService.execute(AbstractActiveBinding.java:146) ~[bundleFile:?]
at org.openhab.core.service.AbstractActiveService$RefreshThread.run(AbstractActiveService.java:169) [bundleFile:?]
2020-10-09 10:22:30.491 [ERROR] [org.openhab.transform.javascript ] - bundle org.openhab.transform.javascript:2.5.9 (268)[org.openhab.transform.javascript.internal.JavaScriptEngineManager(9)] : Error during instantiation of the implementation object
java.lang.reflect.InvocationTargetException: null
at jdk.internal.reflect.GeneratedConstructorAccessor190.newInstance(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
at java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[?:?]
at org.apache.felix.scr.impl.inject.ComponentConstructor.newInstance(ComponentConstructor.java:309) ~[bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:277) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:114) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:982) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:955) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:900) [bundleFile:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse$1.run(ServiceFactoryUse.java:212) [org.eclipse.osgi-3.12.100.jar:?]
at java.security.AccessController.doPrivileged(Native Method) [?:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.factoryGetService(ServiceFactoryUse.java:210) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.getService(ServiceFactoryUse.java:111) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceConsumer$2.getService(ServiceConsumer.java:45) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:508) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.getService(ServiceRegistry.java:461) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.BundleContextImpl.getService(BundleContextImpl.java:624) [org.eclipse.osgi-3.12.100.jar:?]
at org.apache.felix.scr.impl.manager.SingleRefPair.getServiceObject(SingleRefPair.java:86) [bundleFile:?]
at org.apache.felix.scr.impl.inject.BindParameters.getServiceObject(BindParameters.java:47) [bundleFile:?]
at org.apache.felix.scr.impl.inject.methods.BindMethod.getServiceObject(BindMethod.java:664) [bundleFile:?]
at org.apache.felix.scr.impl.manager.DependencyManager.getServiceObject(DependencyManager.java:2308) [bundleFile:?]
at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.prebind(DependencyManager.java:1154) [bundleFile:?]
at org.apache.felix.scr.impl.manager.DependencyManager.prebind(DependencyManager.java:1568) [bundleFile:?]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.collectDependencies(AbstractComponentManager.java:1029) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:935) [bundleFile:?]
at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:900) [bundleFile:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse$1.run(ServiceFactoryUse.java:212) [org.eclipse.osgi-3.12.100.jar:?]
at java.security.AccessController.doPrivileged(Native Method) [?:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.factoryGetService(ServiceFactoryUse.java:210) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceFactoryUse.getService(ServiceFactoryUse.java:111) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceConsumer$2.getService(ServiceConsumer.java:45) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:508) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.getService(ServiceRegistry.java:461) [org.eclipse.osgi-3.12.100.jar:?]
at org.eclipse.osgi.internal.framework.BundleContextImpl.getService(BundleContextImpl.java:624) [org.eclipse.osgi-3.12.100.jar:?]
at org.openhab.core.transform.TransformationHelper.getTransformationService(TransformationHelper.java:45) [bundleFile:?]
at org.openhab.binding.http.internal.HttpBinding.execute(HttpBinding.java:216) [bundleFile:?]
at org.openhab.core.binding.AbstractActiveBinding$BindingActiveService.execute(AbstractActiveBinding.java:146) [bundleFile:?]
at org.openhab.core.service.AbstractActiveService$RefreshThread.run(AbstractActiveService.java:169) [bundleFile:?]
Caused by: java.lang.NoClassDefFoundError: javax/script/ScriptEngineFactory
at java.lang.ClassLoader.findBootstrapClass(Native Method) ~[?:?]
at java.lang.ClassLoader.findBootstrapClassOrNull(ClassLoader.java:1258) ~[?:?]
at java.lang.System$2.findBootstrapClassOrNull(System.java:2134) ~[?:?]
at jdk.internal.loader.ClassLoaders$BootClassLoader.loadClassOrNull(ClassLoaders.java:118) ~[?:?]
at jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:616) ~[?:?]
at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:579) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[?:?]
at org.eclipse.osgi.internal.framework.ContextFinder.loadClass(ContextFinder.java:127) ~[org.eclipse.osgi-3.12.100.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[?:?]
at java.lang.Class.forName0(Native Method) ~[?:?]
at java.lang.Class.forName(Class.java:398) ~[?:?]
at java.util.ServiceLoader$LazyClassPathLookupIterator.nextProviderClass(ServiceLoader.java:1209) ~[?:?]
at java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1220) ~[?:?]
at java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1264) ~[?:?]
at java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1299) ~[?:?]
at java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1384) ~[?:?]
at javax.script.ScriptEngineManager.initEngines(ScriptEngineManager.java:123) ~[java.scripting:?]
at javax.script.ScriptEngineManager.init(ScriptEngineManager.java:87) ~[java.scripting:?]
at javax.script.ScriptEngineManager.(ScriptEngineManager.java:62) ~[java.scripting:?]
at org.openhab.transform.javascript.internal.JavaScriptEngineManager.(JavaScriptEngineManager.java:46) ~[?:?]
… 38 more