Hi, I've encountered a similar issue before.
The problem for me was the Classloader that loaded DataImportHandler class is not the same as the one loading the SolrRequestHandler class. Trace... In SolrCore.java (3.1 source) <-- line 459: createInstance(className, SolrRequestHandler.class, "Request Handler") <-- line: 423: clazz = getResourceLoader().findClass(className); <-- line: 424: if (cast != null && !cast.isAssignableFrom(clazz)) This evaluation will fail since clazz is not loaded by the same classloader as cast. What I did was to make sure that the dataimport jars are NOT in the classpath and not loaded by other classloaders but from the path specified in solrconfig.xml. This will ensure that the dataimport classes are loaded by the same classloader. Not sure if this is the same issue you're encountering, I hope this helps. Thanks, Jeff On Mon, Jun 20, 2011 at 2:36 PM, Muhannad <[email protected]> wrote: > Yes , I just tried it , and this works for Solr 1.4 I am currently working > on , but when I tried 3.1 or 4.0 > the same error appears ,I know that the war file no more contains jar > files related to dataimport and logging functionality , I put all requested > files in class path , and I am sure it loads them as the server starts , but > I guess the problem is that it doesn't recognise dataimportHandler as a > RequestHandler > I really stuck , and confused!!! > > On Mon, Jun 20, 2011 at 3:14 AM, Bill Bell <[email protected]> wrote: > >> Did you try adding something like this to solrconfig.xml ? >> >> <lib dir="../../../../dist/" regex="apache-solr-dataimporthandler-.*\.jar" >> /> >> >> <requestHandler name="/dataimport" >> class="org.apache.solr.handler.dataimport.DataImportHandler"> >> <lst name="defaults"> >> <str name="config">db-data-config.xml</str> >> </lst> >> </requestHandler> >> >> >> >> From: Muhannad <[email protected]> >> Reply-To: <[email protected]> >> Date: Sun, 19 Jun 2011 23:42:45 +0300 >> >> To: <[email protected]> >> Subject: Re: Error :dataimport handler is not request Handler, help >> >> I have tried many things , same problem still , any help? >> >> On Sun, Jun 19, 2011 at 9:00 PM, Muhannad <[email protected]> wrote: >> >>> Hi All , I am really stuck in this problem , I am using solr to index >>> some tables in database and I followed these steps to achieve my goal 1- >>> added the following section to solrconfig.xml <requestHandler >>> name="/dataimport" >>> class="org.apache.solr.handler.dataimport.DataImportHandler"> >>> <lst name="defaults"> >>> <str name="config">data-config.xml</str> >>> </lst> >>> </requestHandler> >>> >>> *2- added apache-solr-dataimporthandler.jar to lib/ directory (include >>> path) >>> every thing goes nice !!! for now , till I fire the server >>> the following error appears , Please I need You help urgently !!! >>> >>> =======================Error message============================== >>> * HTTP ERROR 500 >>> >>> Problem accessing /solr/. Reason: >>> >>> Severe errors in solr configuration. >>> >>> Check your log files for more detailed information on what may be wrong. >>> >>> ------------------------------------------------------------- >>> org.apache.solr.common.SolrException: Error Instantiating Request Handler, >>> org.apache.solr.handler.dataimport.DataImportHandler is not a >>> org.apache.solr.request.SolrRequestHandler >>> at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:396) >>> at org.apache.solr.core.SolrCore.createRequestHandler(SolrCore.java:431) >>> at >>> org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:158) >>> at org.apache.solr.core.SolrCore.<init>(SolrCore.java:513) >>> at org.apache.solr.core.CoreContainer.create(CoreContainer.java:653) >>> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:406) >>> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:291) >>> at >>> org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:240) >>> at >>> org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:93) >>> at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:713) >>> at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) >>> at >>> org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282) >>> at >>> org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518) >>> at >>> org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) >>> at >>> org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) >>> at org.mortbay.jetty.Server.doStart(Server.java:224) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at org.mortbay.xml.XmlConfiguration.main(XmlConfiguration.java:985) >>> 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:616) >>> at org.mortbay.start.Main.invokeMain(Main.java:194) >>> at org.mortbay.start.Main.start(Main.java:534) >>> at org.mortbay.start.Main.start(Main.java:441) >>> at org.mortbay.start.Main.main(Main.java:119) >>> ------------------------------------------------------------- >>> org.apache.solr.common.SolrException: RequestHandler init failure >>> at >>> org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:173) >>> at org.apache.solr.core.SolrCore.<init>(SolrCore.java:513) >>> at org.apache.solr.core.CoreContainer.create(CoreContainer.java:653) >>> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:406) >>> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:291) >>> at >>> org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:240) >>> at >>> org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:93) >>> at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:713) >>> at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) >>> at >>> org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282) >>> at >>> org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518) >>> at >>> org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) >>> at >>> org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at >>> org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) >>> at org.mortbay.jetty.Server.doStart(Server.java:224) >>> at >>> org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) >>> at org.mortbay.xml.XmlConfiguration.main(XmlConfiguration.java:985) >>> 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:616) >>> at org.mortbay.start.Main.invokeMain(Main.java:194) >>> at org.mortbay.start.Main.start(Main.java:534) >>> at org.mortbay.start.Main.start(Main.java:441) >>> at org.mortbay.start.Main.main(Main.java:119) >>> Caused by: org.apache.solr.common.SolrException: Error Instantiating >>> Request Handler, org.apache.solr.handler.dataimport.DataImportHandler is >>> not a org.apache.solr.request.SolrRequestHandler >>> at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:396) >>> at org.apache.solr.core.SolrCore.createRequestHandler(SolrCore.java:431) >>> at >>> org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:158) >>> ... 31 more >>> >>> ------------------------------ >>> *Powered by Jetty://* >>> >>> >>> >>> -- >>> *Eng.Muhannad al Hariri * >>> * >>> * >>> *Software Developer* >>> *email : [email protected]* >>> *twitter : @muh_acit <http://twitter.com/muh_acit>* >>> *Skype : muh.hari* >>> *phone : * >>> * Jordan +962 78 677 5125* >>> * >>> * >>> *حاسبونا فدققوا ثمّ منّوا فأعتقوا ..هكذا شيمة الملوك بالمماليك يرفقوا* >>> * >>> * >>> >>> >> >> >> -- >> *Eng.Muhannad al Hariri * >> * >> * >> *Software Developer* >> *email : [email protected]* >> *twitter : @muh_acit <http://twitter.com/muh_acit>* >> *Skype : muh.hari* >> *phone : * >> * Jordan +962 78 677 5125* >> * >> * >> *حاسبونا فدققوا ثمّ منّوا فأعتقوا ..هكذا شيمة الملوك بالمماليك يرفقوا* >> * >> * >> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> > > > > -- > *Eng.Muhannad al Hariri * > * > * > *Software Developer* > *email : [email protected]* > *twitter : @muh_acit <http://twitter.com/muh_acit>* > *Skype : muh.hari* > *phone : * > * Jordan +962 78 677 5125* > * > * > *حاسبونا فدققوا ثمّ منّوا فأعتقوا ..هكذا شيمة الملوك بالمماليك يرفقوا* > * > * > >
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