Error calling Solr RequestHandler

It seems that I have problems with starting and starting, I followed the guide here

http://andres.jaimes.net/878/setup-lucene-solr-centos-tomcat/

Everything went well, but now I'm trying to import data from mysql. For this, I am following this guide.

http://www.wheelsandcogs.co.uk/2011/01/13/solr-tomcat-mysql-ubuntu/

The error occurs when I add this to my solrconfig.xml file

<requestHandler name="/dataimport" class="org.apache.solr.handler.dataimport.DataImportHandler"> <lst name="defaults"> <str name="config">data-config.xml</str> </lst> </requestHandler> 

This is the error I am getting. If I remove this, solr works fine, but of course I cannot import from mysql.

 HTTP Status 500 - {msg=SolrCore 'collection1' is not available due to init failure: RequestHandler init failure,trace=org.apache.solr.common.SolrException: SolrCore 'collection1' is not available due to init failure: RequestHandler init failure at org.apache.solr.core.CoreContainer.getCore(CoreContainer.java:1212) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:248) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:155) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.jav a:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java :588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:724) Caused by: org.apache.solr.common.SolrException: RequestHandler init failure at org.apache.solr.core.SolrCore.<init>(SolrCore.java:821) at org.apache.solr.core.SolrCore.<init>(SolrCore.java:618) at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:949) at org.apache.solr.core.CoreContainer.create(CoreContainer.java:984) at org.apache.solr.core.CoreContainer$2.call(CoreContainer.java:597) at org.apache.solr.core.CoreContainer$2.call(CoreContainer.java:592) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) ... 1 more Caused by: org.apache.solr.common.SolrException: RequestHandler init failure at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:168) at org.apache.solr.core.SolrCore.<init>(SolrCore.java:758) ... 13 more Caused by: org.apache.solr.common.SolrException: Error loading class 'org.apache.solr.handler.dataimport.DataImportHandler' at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:464) at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:396) at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:518) at org.apache.solr.core.SolrCore.createRequestHandler(SolrCore.java:592) at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:154) ... 14 more Caused by: java.lang.ClassNotFoundException: org.apache.solr.handler.dataimport.DataImportHandler 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:424) at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:789) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:270) at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:448) ... 18 more ,code=500} 

I am running Centos, so using the first guide, you can start and run. The second guide for Ubuntu, there is a step closer to the beginning about installing JDBC, I'm not sure if I did it right. I am wondering if this could be part of the problem.

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2 answers

Turns out I made a dumb mistake.

Tutorial above http://andres.jaimes.net/878/setup-lucene-solr-centos-tomcat/

Instructs us to copy

 example/solr/ 

to

 /home/solr 

In addition, this particular example provided by solr does not contain the necessary files for processing data.

To fix this:

1) Create a lib folder in your solr instance (/ home / solr / lib)

2) From the folder where you downloaded solr, copy /dist/solr-dataimporthandler-xxxjar and solr-dataimporthandler-extras-xxxjar . Paste both into your new lib folder.

Also make sure mysql-connector-java.jar is in this folder if you haven't already.

3) Reboot the server.

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You need to change the folder permission:

 sudo chmod -R 777 solr 
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Source: https://habr.com/ru/post/955094/


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