java.lang.NoClassDefFoundError while deploying on Tomcat server

18 Apr 2013

      Hi,

I've downloaded last BaseX version from the download page and what I've done it is just put the BaseX76.war into webapps deployment directory of Tomcat.

As far as I know, it has deployed correctly, since I can make REST requests successfully like http://MiServer/BaseX76/rest?command=show+users.

The problem comes when I try to access it from my Java Application, where I've tried with two methods: JavaClient and XQJ. With JavaClient it works, but with XQJ the response is always the same (log from [TOMCAT_DEPLOYMENT_DIRECTORY]/BaseX76/data/.logs):

13:32:40.053    172.24.41.93:59521      admin  ERROR   Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk@mailman.uni-konstanz.de Version: BaseX 7.6 Java: Oracle Corporation, 1.7.0 OS: Linux, i386 Stack Trace: java.lang.NoClassDefFoundError: org/basex/index/value/DiskValues org.basex.data.DiskData.<init>(DiskData.java:88) org.basex.core.cmd.Open.open(Open.java:70) org.basex.core.cmd.Open.run(Open.java:36) org.basex.core.Command.run(Command.java:342) org.basex.core.Command.exec(Command.java:321) org.basex.core.Command.execute(Command.java:78) org.basex.server.ClientListener.run(ClientListener.java:145)      453.12 ms

The block of Java code where the Exception is thrown is the following (for the case of XQJ):

       log.debug("[BaseX] executing query:"+query);

       XQDataSource xqs = new BaseXXQDataSource();

       xqs.setProperty("databaseName", dbName);

       xqs.setProperty("serverName", serverNameBaseX);

       xqs.setProperty("port", portBaseX);

       xqs.setProperty("user", usuario);

       xqs.setProperty("password", clave);

       xqs.setLogWriter(new PrintWriter(System.out, true));

       XQConnection xqc = xqs.getConnection();        ß Here is where the Exception is thrown

       XQExpression xqe = xqc.createExpression();

       XQSequence xq = xqe.executeQuery(query);

       StringBuilder res = new StringBuilder();

       while (xq.next()) {

              res.append(xq.getItemAsString(null));

       }

       log.debug("[BaseX] result:"+res);

       xqc.close();

It seems that it is not finding the jars inside the WAR where DiskData class is located, but I've entered into the Tomcat directory where the WAR has been deployed (/BaseX76/WEB-INF/lib) and all of them are there:

-rw-rw---- 1  2558399 2013-02-05 18:22 basex-7.6.jar

-rw-rw---- 1   295821 2013-01-30 11:42 basex-xqj-1.2.3.jar

-rw-rw---- 1    58160 2013-01-30 11:42 commons-codec-1.4.jar

-rw-rw---- 1    59590 2013-01-30 11:42 commons-fileupload-1.2.2.jar

-rw-rw---- 1   109043 2013-01-30 11:42 commons-io-1.4.jar

-rw-rw---- 1   153115 2013-01-30 11:42 jdom-1.1.jar

-rw-rw---- 1   794991 2013-01-31 15:34 jts-1.13.jar

-rw-rw---- 1   410933 2013-01-30 11:42 milton-api-1.7.2.jar

-rw-rw---- 1   119180 2013-01-30 11:42 mime-util-2.1.3.jar

-rw-rw---- 1    23445 2013-01-30 11:42 slf4j-api-1.5.8.jar

-rw-rw---- 1     5284 2013-01-30 11:42 slf4j-nop-1.5.8.jar

-rw-rw---- 1     9260 2013-01-30 11:42 xmldb-api-1.0.jar

-rw-rw---- 1     7188 2013-01-30 11:45 xmlpull-1.1.3.1.jar

-rw-rw---- 1    24956 2013-01-30 11:45 xpp3_min-1.1.4c.jar

-rw-rw---- 1     4578 2013-01-30 11:42 xqj2-0.1.0.jar

-rw-rw---- 1    16221 2013-01-30 11:42 xqj-api-1.0.jar

-rw-rw---- 1   481672 2013-01-30 11:42 xstream-1.4.2.jar

Any ideas?. Other projects deployed into that server worked without any problem. I know that I could use JavaClient method for accessing but then the problem is that I cannot recover the result of the query execution, while with XQJ I can:

JavaClient:

             log.debug("[BaseX] executing query:"+query);

             ClientSession cSes = new ClientSession(serverNameBaseX, Integer.valueOf(portBaseX), user, pass);

             cSes.setOutputStream(System.out);

             ClientQuery cQuery = cSes.query(query);

             cQuery.execute();

             String res = cQuery.info();             ß This res only stores the execution time and not the result of the query, so it is useless (for me :-) )

             cQuery.close();

XQJ:

              XQSequence xq = xqe.executeQuery(query);       ß Instead, this do stores the result of the query (exactly what I want)

Thank you and best regards,

                C.

Carlos Marcos Lagunar

Health Technical Consultant

Research & Innovation

carlos.marcos@atosresearch.eu <mailto:carlos.marcos@atosresearch.eu> 

Valladolid - Spain

www.atosresearch.eu <http://www.atosresearch.eu/> 

es.atos.net

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