Saw zero errors like this on demo I guess you can ignore it On Thu, 26 Mar 2020 at 22:21, Rodolfo Gonzalez <rodolfo.gonza...@gmail.com> wrote:
> Third message of the day. I'm getting paranoic :D > > OM 4.0.10, openjdk 11, ubuntu 18.04 > > I'm getting this too, but I don't know neither the effect nor the cause: > > [ERROR] [Wicket-AsyncPageStore-PageSavingThread] > org.apache.wicket.serialize.java.JavaSerializer - error writing object > [Page class = org.apache.openmeetings.web.pages.HashPage, id = 0, render > count = 1]: null > java.util.ConcurrentModificationException: null > at java.base/java.util.ArrayList.writeObject(ArrayList.java:900) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at > org.apache.wicket.serialize.java.JavaSerializer$SerializationCheckerObjectOutputStream.writeObjectOverride(JavaSerializer.java:368) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:345) > at > org.apache.wicket.serialize.java.JavaSerializer.serialize(JavaSerializer.java:82) > at > org.apache.wicket.pageStore.AbstractPageStore.serializePage(AbstractPageStore.java:133) > at > org.apache.wicket.pageStore.DefaultPageStore.createSerializedPage(DefaultPageStore.java:281) > at > org.apache.wicket.pageStore.DefaultPageStore.storePage(DefaultPageStore.java:61) > at > org.apache.wicket.pageStore.AsynchronousPageStore$PageSavingRunnable.run(AsynchronousPageStore.java:208) > at java.base/java.lang.Thread.run(Thread.java:834) > [ERROR] [Wicket-AsyncPageStore-PageSavingThread] > org.apache.wicket.serialize.java.JavaSerializer - Error serializing object > class org.apache.openmeetings.web.pages.HashPage [object=[Page class = > org.apache.openmeetings.web.pages.HashPage, id = 0, render count = 1]] > org.apache.wicket.WicketRuntimeException: > java.util.ConcurrentModificationException > at > org.apache.wicket.serialize.java.JavaSerializer$SerializationCheckerObjectOutputStream.writeObjectOverride(JavaSerializer.java:402) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:345) > at > org.apache.wicket.serialize.java.JavaSerializer.serialize(JavaSerializer.java:82) > at > org.apache.wicket.pageStore.AbstractPageStore.serializePage(AbstractPageStore.java:133) > at > org.apache.wicket.pageStore.DefaultPageStore.createSerializedPage(DefaultPageStore.java:281) > at > org.apache.wicket.pageStore.DefaultPageStore.storePage(DefaultPageStore.java:61) > at > org.apache.wicket.pageStore.AsynchronousPageStore$PageSavingRunnable.run(AsynchronousPageStore.java:208) > at java.base/java.lang.Thread.run(Thread.java:834) > Caused by: java.util.ConcurrentModificationException: null > at java.base/java.util.ArrayList.writeObject(ArrayList.java:900) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at java.base/java.util.ArrayList.writeObject(ArrayList.java:896) > at > java.base/jdk.internal.reflect.GeneratedMethodAccessor185.invoke(Unknown > Source) > at > java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:566) > at > java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1130) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1497) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553) > at > java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510) > at > java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433) > at > java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179) > at > java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349) > at > org.apache.wicket.serialize.java.JavaSerializer$SerializationCheckerObjectOutputStream.writeObjectOverride(JavaSerializer.java:368) > > Thanks. > -- WBR Maxim aka solomax
