Struts 2.5.14.1, WebSphere 8.5.5.13, IBM Java 8 (level 1.8.0_161) on AIX.
We have a JSP with a plain <s:fielderrors /> element that works without issue
when we switch WebSphere back to Java 7, but in Java 8 produces the following
error:
2018-05-22 12:43:24,384 ERROR [freemarker.runtime]: error - Error executing
FreeMarker template
FreeMarker template error:
Java method "AbstractCollection.size()" threw an exception when invoked on
LinkedHashMap$LinkedKeySet object "[]"; see cause exception in the Java stack
trace.
----
FTL stack trace ("~" means nesting-related):
- Failed at: #assign eKeysSize = eKeys.size() [in template
"template/simple/fielderror.ftl" at line 23, column 5]
----
Java stack trace (for programmers):
----
freemarker.core._TemplateModelException: [... Exception message was already
printed; see it above ...]
at
freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:289)
at
freemarker.ext.beans._MethodUtil.newInvocationTemplateModelException(_MethodUtil.java:252)
at
freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:74)
at freemarker.core.MethodCall._eval(MethodCall.java:65)
at freemarker.core.Expression.eval(Expression.java:81)
at freemarker.core.Assignment.accept(Assignment.java:134)
at freemarker.core.Environment.visit(Environment.java:326)
at freemarker.core.Environment.visit(Environment.java:332)
at freemarker.core.Environment.visit(Environment.java:332)
at freemarker.core.Environment.process(Environment.java:305)
at freemarker.template.Template.process(Template.java:378)
at
org.apache.struts2.components.template.FreemarkerTemplateEngine.renderTemplate(FreemarkerTemplateEngine.java:149)
at org.apache.struts2.components.UIBean.mergeTemplate(UIBean.java:579)
at org.apache.struts2.components.UIBean.end(UIBean.java:535)
at
org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:39)
.. my JSP
..
Caused by: java.lang.AbstractMethodError: java/util/AbstractCollection.size()I
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:508)
at
freemarker.ext.beans.BeansWrapper.invokeMethod(BeansWrapper.java:1487)
at
freemarker.ext.beans.SimpleMethodModel.exec(SimpleMethodModel.java:69)
Does anyone know what could be the cause of this?
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