title: NullPointerException when starting SOLR 4.3.1 on LibertyProfile 8.5.5
body: <p>I'm trying to start SOLR 4.3.1 on a Websphere Liberty Profile 8.5.5. I put the solr.war into the dropins folder and added the logging jars (log4j-1.2.16.jar, slf4j-api-1.6.6.jar, slf4j-log4j12-1.6.6.jar) as global librarys. During startup of solr the following exception is thrown:</p>
  
  <pre><code>java.lang.NullPointerException: 
  at com.ibm.websphere.ras.TruncatableThrowable.getStackTrace(TruncatableThrowable.java:247)
  at [internal classes]
  at com.ibm.ws.logging.internal.impl.BaseTraceFormatter.formatMessage(BaseTraceFormatter.java:234)
  at com.ibm.ws.logging.internal.impl.BaseTraceFormatter.formatMessage(BaseTraceFormatter.java:191)
  at com.ibm.ws.logging.internal.impl.BaseTraceService.publishLogRecord(BaseTraceService.java:447)
  at com.ibm.ws.logging.internal.impl.LoggerHandlerManager$BaseTrLoggerHandler.publish(LoggerHandlerManager.java:69)
  at java.util.logging.Logger.log(Unknown Source)
  at com.ibm.ws.logging.internal.WsLogger.log(WsLogger.java:158)
  at com.ibm.ws.logging.internal.WsLogger.logp(WsLogger.java:354)
  at com.ibm.ws.webcontainer.webapp.WebApp.logMessage(WebApp.java:2981)
  at [internal classes]
  at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:165)
  at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:155)
  at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:194)
  at [internal classes]
  </code></pre>
  
  <p>Is anyone using SOLR on Websphere Liberty successfully?</p>