Carmen I assume you are just building a normal Maven JAR?
In which case the JAR produced will contain only your code and will not contain the dependencies of your code and you are expected to provide them to Hadoop's class path separately or you'll get these kinds of errors when trying to run your program What I usually do (and I've seen others do) is to use the maven assembly plugin to build a fat JAR with my code and all the necessary dependencies and then run this instead. For an example maven assembler plugin configuration see https://svn.apache.org/viewvc/jena/Experimental/hadoop-rdf/hadoop-rdf-stats /pom.xml?view=markup lines 82-100 And the corresponding maven assembler file can be seen at https://svn.apache.org/viewvc/jena/Experimental/hadoop-rdf/hadoop-rdf-stats /hadoop-job.xml?view=markup Rob On 29/07/2014 20:53, "Andy Seaborne" <[email protected]> wrote: > >On 29/07/14 15:01, Carmen Manzulli wrote: >> Ok, sorry; i'm trying to use query and queryFactory classes of jena in >>my >> code in this way: >> >> >> String que=getConf().get("ARQ.query"); //ARQ in a string >> parameter in input (the query, for example SELECT *) >> System.out.println("request to process query : "+que); >> Query query = QueryFactory.create(que); >> >> in the third line i got error.... > >So is the error is different to your initial report and currently: > >java.lang.NoClassDefFoundError: org.apache.xerces.util.XMLChar > >what's the stacktrace for that one? > > >The maven output looks OK but > >1/ Are that there endorsed jars around? >2/ What the runtime classpath? > > Andy > >> >> i used maven to create my project and i wrote a pom with dependencies; >>this >> is the cut of my pom: >> >> <dependencies> >> <dependency> >> <groupId>org.apache.hadoop</groupId> >> <artifactId>hadoop-core</artifactId> >> <version>1.2.1</version> >> </dependency> >> <dependency> >> <groupId>org.apache.giraph</groupId> >> <artifactId>giraph-core</artifactId> >> <version>1.1.0</version> >> </dependency> >> <dependency> >> <groupId>org.apache.jena</groupId> >> <artifactId>jena-arq</artifactId> >> <version>2.12.0-SNAPSHOT</version> >> </dependency> >> </dependencies> >> >> >> this is the dependency tree: >> >> [INFO] --- maven-dependency-plugin:2.1:tree (default-cli) @ sisinflab >>--- >> [INFO] sisinflab:sisinflab:jar:1.0-SNAPSHOT >> [INFO] +- org.apache.hadoop:hadoop-core:jar:1.2.1:compile >> [INFO] | +- commons-cli:commons-cli:jar:1.2:compile >> [INFO] | +- xmlenc:xmlenc:jar:0.52:compile >> [INFO] | +- com.sun.jersey:jersey-core:jar:1.8:compile >> [INFO] | +- com.sun.jersey:jersey-json:jar:1.8:compile >> [INFO] | | +- org.codehaus.jettison:jettison:jar:1.1:compile >> [INFO] | | | \- stax:stax-api:jar:1.0.1:compile >> [INFO] | | +- com.sun.xml.bind:jaxb-impl:jar:2.2.3-1:compile >> [INFO] | | | \- javax.xml.bind:jaxb-api:jar:2.2.2:compile >> [INFO] | | | +- javax.xml.stream:stax-api:jar:1.0-2:compile >> [INFO] | | | \- javax.activation:activation:jar:1.1:compile >> [INFO] | | +- org.codehaus.jackson:jackson-core-asl:jar:1.7.1:compile >> [INFO] | | +- org.codehaus.jackson:jackson-jaxrs:jar:1.7.1:compile >> [INFO] | | \- org.codehaus.jackson:jackson-xc:jar:1.7.1:compile >> [INFO] | +- com.sun.jersey:jersey-server:jar:1.8:compile >> [INFO] | | \- asm:asm:jar:3.1:compile >> [INFO] | +- commons-io:commons-io:jar:2.1:compile >> [INFO] | +- commons-httpclient:commons-httpclient:jar:3.0.1:compile >> [INFO] | | +- junit:junit:jar:3.8.1:compile >> [INFO] | | \- commons-logging:commons-logging:jar:1.0.3:compile >> [INFO] | +- commons-codec:commons-codec:jar:1.4:compile >> [INFO] | +- org.apache.commons:commons-math:jar:2.1:compile >> [INFO] | +- commons-configuration:commons-configuration:jar:1.6:compile >> [INFO] | | +- >>commons-collections:commons-collections:jar:3.2.1:compile >> [INFO] | | +- commons-lang:commons-lang:jar:2.4:compile >> [INFO] | | +- commons-digester:commons-digester:jar:1.8:compile >> [INFO] | | | \- commons-beanutils:commons-beanutils:jar:1.7.0:compile >> [INFO] | | \- >>commons-beanutils:commons-beanutils-core:jar:1.8.0:compile >> [INFO] | +- commons-net:commons-net:jar:1.4.1:compile >> [INFO] | +- org.mortbay.jetty:jetty:jar:6.1.26:compile >> [INFO] | | \- org.mortbay.jetty:servlet-api:jar:2.5-20081211:compile >> [INFO] | +- org.mortbay.jetty:jetty-util:jar:6.1.26:compile >> [INFO] | +- tomcat:jasper-runtime:jar:5.5.12:compile >> [INFO] | +- tomcat:jasper-compiler:jar:5.5.12:compile >> [INFO] | +- org.mortbay.jetty:jsp-api-2.1:jar:6.1.14:compile >> [INFO] | | \- org.mortbay.jetty:servlet-api-2.5:jar:6.1.14:compile >> [INFO] | +- org.mortbay.jetty:jsp-2.1:jar:6.1.14:compile >> [INFO] | | \- ant:ant:jar:1.6.5:compile >> [INFO] | +- commons-el:commons-el:jar:1.0:compile >> [INFO] | +- net.java.dev.jets3t:jets3t:jar:0.6.1:compile >> [INFO] | +- hsqldb:hsqldb:jar:1.8.0.10:compile >> [INFO] | +- oro:oro:jar:2.0.8:compile >> [INFO] | +- org.eclipse.jdt:core:jar:3.1.1:compile >> [INFO] | \- org.codehaus.jackson:jackson-mapper-asl:jar:1.8.8:compile >> [INFO] +- org.apache.giraph:giraph-core:jar:1.1.0:compile >> [INFO] \- org.apache.jena:jena-arq:jar:2.12.0-SNAPSHOT:compile >> [INFO] +- org.apache.jena:jena-core:jar:2.12.0-SNAPSHOT:compile >> [INFO] | +- org.apache.jena:jena-iri:jar:1.1.0-SNAPSHOT:compile >> [INFO] | \- xerces:xercesImpl:jar:2.11.0:compile >> [INFO] | \- xml-apis:xml-apis:jar:1.4.01:compile >> [INFO] +- org.apache.httpcomponents:httpclient:jar:4.2.6:compile >> [INFO] | \- org.apache.httpcomponents:httpcore:jar:4.2.5:compile >> [INFO] +- com.github.jsonld-java:jsonld-java:jar:0.5.0:compile >> [INFO] | +- >>com.fasterxml.jackson.core:jackson-core:jar:2.3.3:compile >> [INFO] | \- >> com.fasterxml.jackson.core:jackson-databind:jar:2.3.3:compile >> [INFO] | \- >> com.fasterxml.jackson.core:jackson-annotations:jar:2.3.0:compile >> [INFO] +- >>org.apache.httpcomponents:httpclient-cache:jar:4.2.6:compile >> [INFO] +- org.slf4j:jcl-over-slf4j:jar:1.7.6:compile >> [INFO] +- org.slf4j:slf4j-api:jar:1.7.6:compile >> [INFO] +- org.slf4j:slf4j-log4j12:jar:1.7.6:compile >> [INFO] \- log4j:log4j:jar:1.2.17:compile >> >> after i created jar and executed this one using hadoop >> >> in a first time the problem was NoClassDefFound com.hp.hpl.jena.query >> now the output is NoClassDefFound org.apache.xerces.util.XMLChar > > >> >> >> >> >> 2014-07-29 13:43 GMT+02:00 Rob Vesse <[email protected]>: >> >>> Carmen >>> >>> It would be helpful if you showed us what you are doing, otherwise we >>>can >>> only guess and offer vague suggestions. >>> >>> Assuming you are using Maven as previously stated please provide the >>> <dependencies> section of your POM >>> >>> It is also worth running mvn dependency:tree and checking that you >>>don't >>> have multiple entries for Jena libraries present. Including the >>>output of >>> this would also help us debug your problem >>> >>> Rob >>> >>> On 29/07/2014 12:08, "Carmen Manzulli" <[email protected]> >>>wrote: >>> >>>> i've proved with jena-arq and jena-core 2.12.0 but these don't fix my >>>> problem...the output is the same: >>>> >>>> NoClassDefFoundError: com/hp/hpl/jena/shared/PrefixMapping >>>> >>>> >>>> can you suggest me a right way to insert jena as dependency keeping in >>>> mind >>>> that i need only Query and QueryFactory classes? >>>> >>>> >>>> 2014-07-28 18:21 GMT+02:00 Andy Seaborne <[email protected]>: >>>> >>>>> On 28/07/14 16:36, Carmen Manzulli wrote: >>>>> >>>>>> ok....i'm using giraph 1.1.0, hadoop 1.2.1 jena arq 2.12.0 and >>>>>> com.hp.hpl.jena 2.8.8; I've introduced the last one because there >>>>>>were >>>>>> class not found exceptions for query and queryfactory....i make use >>>>>>of >>>>>> these two classes to implement a simple select and just for the >>>>>>moment >>>>>> i'm >>>>>> using select* as query string to test the code! >>>>>> >>>>> >>>>> jena arq 2.12.0 and jena-core 2.8.8 don't mix. >>>>> >>>>> Use a consistent cut of jena. >>>>> >>>>> Andy >>>>> >>>>> >>>>> >>>>>> >>>>>> 2014-07-28 16:43 GMT+02:00 Andy Seaborne <[email protected]>: >>>>>> >>>>>> On 28/07/14 15:00, Carmen Manzulli wrote: >>>>>>> >>>>>>> Hi experts, >>>>>>>> >>>>>>>> i'm trying to use some jena classes (as Query and QueryFactory) >>>>>>>>in a >>>>>>>> project but when i run my code i get: >>>>>>>> >>>>>>>> java.lang.NoClassDefFoundError: >>>>>>>> com/hp/hpl/jena/shared/PrefixMapping$IllegalPrefixException >>>>>>>> at com.hp.hpl.jena.query.QueryFactory.create( >>>>>>>> QueryFactory.java:68) >>>>>>>> at com.hp.hpl.jena.query.QueryFactory.create( >>>>>>>> QueryFactory.java:40) >>>>>>>> at com.hp.hpl.jena.query.QueryFactory.create( >>>>>>>> QueryFactory.java:28) >>>>>>>> at sisinflab.Query2.compute(Query2.java:27) >>>>>>>> >>>>>>>> and also : >>>>>>>> >>>>>>>> java.lang.ClassNotFoundException: >>>>>>>> com.hp.hpl.jena.shared.PrefixMapping$IllegalPrefixException >>>>>>>> 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) >>>>>>>> ... 12 more >>>>>>>> >>>>>>>> who can help me? >>>>>>>> >>>>>>>> >>>>>>> "NoClassDefFoundError" means it was there are compile time (of >>>>>>>Jena) >>>>>>> and >>>>>>> not at runtime (of your code). >>>>>>> >>>>>>> You have an incomplete or incompatible set of jars files. >>>>>>> >>>>>>> Andy >>>>>>> >>>>>>> PS Please could you include things like version numbers (needed for >>>>>>> line >>>>>>> numbers to mean anything), the query in question, etc when >>>>>>>describing >>>>>>> something. >>>>>>> >>>>>>> >>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>> >>> >>> >>> >>> >> >
