Solr WebAdmin error 500

Question

it been days that I am trying to find a solution to start Solr 5.2.1 properly, but I always get this error :

HTTP ERROR 500

Problem accessing /solr/. Reason:

Server Error

Caused by:

java.lang.NullPointerException at org.apache.solr.servlet.SolrDispatchFilter.authenticateRequest(SolrDispatchFilter.java:254) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:203) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:196) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHa ndler.doScope(ContextHandler.java:1061) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:497) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) at java.lang.Thread.run(Thread.java:745) Powered by Jetty://

Do you have any idea about it ? Thanks a lot !

Update :

Whene I check the solr sevice status :

service solr status

I get this too :

Typically, this indicates a problem with the Solr server; check the Solr server logs for more information. at org.apache.solr.util.SolrCLI$SolrResponseHandler.handleResponse(SolrCLI.java:502) at org.apache.solr.util.SolrCLI$SolrResponseHandler.handleResponse(SolrCLI.java:492) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:222) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:164) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:139) at org.apache.solr.util.SolrCLI.getJson(SolrCLI.java:527) at org.apache.solr.util.SolrCLI.getJson(SolrCLI.java:471) at org.apache.solr.util.SolrCLI$StatusTool.runTool(SolrCLI.java:659) at org.apache.solr.util.SolrCLI.main(SolrCLI.java:215)

Answer 1

I had multiple dataimport jar version so Solr bugged to choose one ! I deteted the others. Thanks