Beginner questions, java.lang.NoClassDefFoundError: javax/servlet/ServletRequest

[k0105]

Hi,

I'm trying to get started with OAQA. My goal for now is a project that can answer basic questions as a stepping stone for more involved work (general knowledge would be preferred). Hence, I tried to compile HelloQA following the instructions (downloaded Gutenberg, extracted files, opened project in Eclipse 4.5.1, ran test.launch), but it throws java.lang.NoClassDefFoundErrors. I have been able to solve some by adding <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.13</version> </dependency> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-core</artifactId> <version>3.6.0</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3</version> </dependency> to pom.xml

But I now get Phase: 2|retrieval-strategist> Exception in thread "main" java.lang.NoClassDefFoundError: javax/servlet/ServletRequest

Since I'm completely inexperienced with this pipeline: What can I do now? Did you make any assumptions? Right now I have set up neither UIMA, Indri, CSE nor any other OAQA projects. Was I supposed to?

Thanks in advance.

Best wishes,
Joe

[k0105]

OK, let me append the full output:
log4j:WARN No appenders could be found for logger (org.springframework.core.io.support.PathMatchingResourcePatternResolver). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. openqa.collection.filename system property not specified, using 'file' parameter from configuration file Reading file: /input/small.txt from the classpath Phase: 2|retrieval-strategist> Exception in thread "main" java.lang.NoClassDefFoundError: javax/servlet/ServletRequest at org.apache.solr.servlet.SolrRequestParsers.<init>(SolrRequestParsers.java:95) at org.apache.solr.client.solrj.embedded.EmbeddedSolrServer.<init>(EmbeddedSolrServer.java:91) at edu.cmu.lti.oaqa.core.provider.solr.SolrWrapper.createEmbeddedSolrServer(SolrWrapper.java:80) at edu.cmu.lti.oaqa.core.provider.solr.SolrWrapper.<init>(SolrWrapper.java:45) at edu.cmu.lti.oaqa.openqa.hello.retrieval.SimpleSolrRetrievalStrategist.initialize(SimpleSolrRetrievalStrategist.java:58) at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initializeAnalysisComponent(PrimitiveAnalysisEngine_impl.java:250) at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initialize(PrimitiveAnalysisEngine_impl.java:156) at org.apache.uima.impl.AnalysisEngineFactory_impl.produceResource(AnalysisEngineFactory_impl.java:94) at org.apache.uima.impl.CompositeResourceFactory_impl.produceResource(CompositeResourceFactory_impl.java:62) at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:269) at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:314) at org.apache.uima.UIMAFramework.produceAnalysisEngine(UIMAFramework.java:425) at org.uimafit.factory.AnalysisEngineFactory.createAggregate(AnalysisEngineFactory.java:424) at edu.cmu.lti.oaqa.ecd.phase.BasePhase.loadOptions(BasePhase.java:326) at edu.cmu.lti.oaqa.ecd.phase.BasePhase.initialize(BasePhase.java:119) at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initializeAnalysisComponent(PrimitiveAnalysisEngine_impl.java:250) at org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.initialize(PrimitiveAnalysisEngine_impl.java:156) at org.apache.uima.impl.AnalysisEngineFactory_impl.produceResource(AnalysisEngineFactory_impl.java:94) at org.apache.uima.impl.CompositeResourceFactory_impl.produceResource(CompositeResourceFactory_impl.java:62) at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:269) at org.apache.uima.UIMAFramework.produceAnalysisEngine(UIMAFramework.java:387) at org.apache.uima.analysis_engine.asb.impl.ASB_impl.setup(ASB_impl.java:254) at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initASB(AggregateAnalysisEngine_impl.java:431) at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initializeAggregateAnalysisEngine(AggregateAnalysisEngine_impl.java:375) at org.apache.uima.analysis_engine.impl.AggregateAnalysisEngine_impl.initialize(AggregateAnalysisEngine_impl.java:185) at org.apache.uima.impl.AnalysisEngineFactory_impl.produceResource(AnalysisEngineFactory_impl.java:94) at org.apache.uima.impl.CompositeResourceFactory_impl.produceResource(CompositeResourceFactory_impl.java:62) at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:269) at org.apache.uima.UIMAFramework.produceResource(UIMAFramework.java:314) at org.apache.uima.UIMAFramework.produceAnalysisEngine(UIMAFramework.java:425) at org.uimafit.factory.AnalysisEngineFactory.createAggregate(AnalysisEngineFactory.java:424) at edu.cmu.lti.oaqa.ecd.BaseExperimentBuilder.buildPipeline(BaseExperimentBuilder.java:166) at edu.cmu.lti.oaqa.ecd.BaseExperimentBuilder.buildPipeline(BaseExperimentBuilder.java:143) at edu.cmu.lti.oaqa.ecd.driver.ECDDriver.run(ECDDriver.java:63) at edu.cmu.lti.oaqa.ecd.driver.ECDDriver.main(ECDDriver.java:96) Caused by: java.lang.ClassNotFoundException: javax.servlet.ServletRequest at java.net.URLClassLoader$1.run(URLClassLoader.java:359) at java.net.URLClassLoader$1.run(URLClassLoader.java:348) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:347) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) ... 35 more

And let me take a wild guess as well: This is somehow caused by the Solr server, right? Are you trying to launch an embedded Solr server? Can I somehow run it standalone?

I'd really appreciate some help here.