ClassNotFoundException: org.dllearner.autosparql.server.util.SimpleHTMLLayout

[ziodave]

Hello,

When I run mvn install -N in autosparql I get the following error:

Running org.aksw.autosparql.server.CacheTest
log4j:ERROR Could not instantiate class [org.dllearner.autosparql.server.util.SimpleHTMLLayout].
java.lang.ClassNotFoundException: org.dllearner.autosparql.server.util.SimpleHTMLLayout

Is there a way to fix this?

[LorenzBuehmann]

I can not find any occurrences of class SimpleHTMLLayout in CacheTest, see https://github.com/AKSW/AutoSPARQL/blob/master/autosparql/src/test/java/org/aksw/autosparql/server/CacheTest.java. Do you use the latest version?

[ziodave]

This is the full stack trace:

Running org.aksw.autosparql.server.CacheTest
log4j:ERROR Could not instantiate class [org.dllearner.autosparql.server.util.SimpleHTMLLayout].
java.lang.ClassNotFoundException: org.dllearner.autosparql.server.util.SimpleHTMLLayout
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:190)
    at org.apache.log4j.helpers.Loader.loadClass(Loader.java:198)
    at org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:326)
    at org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:123)
    at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:764)
    at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:735)
    at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:615)
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:502)
    at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:547)
    at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:483)
    at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
    at org.apache.log4j.Logger.getRootLogger(Logger.java:135)
    at org.aksw.autosparql.server.CacheTest.fillCacheTest(CacheTest.java:78)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
    at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
    at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
    at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:345)
    at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1009)
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

Running a grep on all files I can see the following:

$ find . -type f -exec grep "SimpleHTMLLayout" {} \; -print
public class SimpleHTMLLayout extends HTMLLayout {
./src/main/java/org/aksw/autosparql/server/util/SimpleHTMLLayout.java
log4j.appender.html.layout=org.dllearner.autosparql.server.util.SimpleHTMLLayout
./src/main/resources/log4j.properties
org/aksw/autosparql/server/util/SimpleHTMLLayout.class
./target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst
log4j.appender.html.layout=org.dllearner.autosparql.server.util.SimpleHTMLLayout
./war/WEB-INF/classes/log4j.properties
Binary file ./war/WEB-INF/classes/org/aksw/autosparql/server/util/SimpleHTMLLayout.class matches
./war/WEB-INF/classes/org/aksw/autosparql/server/util/SimpleHTMLLayout.class

If it possibile that the SimpleHTMLLayout is referenced by the log4j configuration?

I'll try to comment it out.

[ziodave]

As a temporary workaround I replaced this - although I suspect that user_sessions.html is important :smile: :

log4j.appender.html=org.apache.log4j.DailyRollingFileAppender
log4j.appender.html.File=logs/user_sessions.html
log4j.appender.html.layout=org.dllearner.autosparql.server.util.SimpleHTMLLayout
log4j.appender.html.threshold=INFO
log4j.appender.html.Append=true

with this:

log4j.appender.html=org.apache.log4j.FileAppender
log4j.appender.html.File=logs/user_sessions.html
log4j.appender.html.layout=org.apache.log4j.PatternLayout
log4j.appender.html.layout.ConversionPattern=%d{ABSOLUTE} %-5p %C{1}: %m%n
log4j.appender.html.threshold=INFO
log4j.appender.html.Append=true

[ziodave]

Compilation still fails with the following error:

Failed to execute goal org.codehaus.mojo:gwt-maven-plugin:2.3.0:compile (default) on project autosparql: GWT Module org.dllearner.autosparql.Application not found in project sources or resources.