Fails to index if unique field has special characters

[Cool Techi]

Hi,
We are migrating from Solr 4.6 standalone to Solr 4.7 cloud version, while 
reindexing the document we are getting the following error. This is happening 
when the unique key has special character, this was not noticed in version 4.6 
standalone mode, so we are not sure if this is a version problem or a cloud 
issue. Example of the unique key is given below,
http://www.mynews.in/Blog/smrity!!**)))!miami_dolphins_vs_dallas_cowboys_live_stream_on_line_nfl_football_free_video_broadcast_B142707.html
Exception Stack Trace
ERROR - 2014-04-10 10:51:44.361; org.apache.solr.common.SolrException; 
java.lang.ArrayIndexOutOfBoundsException: 2       at 
org.apache.solr.common.cloud.CompositeIdRouter$KeyParser.getHash(CompositeIdRouter.java:296)
       at 
org.apache.solr.common.cloud.CompositeIdRouter.sliceHash(CompositeIdRouter.java:58)
       at 
org.apache.solr.common.cloud.HashBasedRouter.getTargetSlice(HashBasedRouter.java:33)
       at 
org.apache.solr.update.processor.DistributedUpdateProcessor.setupRequest(DistributedUpdateProcessor.java:218)
       at 
org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:550)
       at 
org.apache.solr.update.processor.LogUpdateProcessor.processAdd(LogUpdateProcessorFactory.java:100)
       at 
org.apache.solr.handler.loader.XMLLoader.processUpdate(XMLLoader.java:247)      
 at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:174)       at 
org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:92)
       at 
org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74)
       at 
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
       at org.apache.solr.core.SolrCore.execute(SolrCore.java:1916)       at 
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:780) 
      at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:427)
       at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:217)
       at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
       at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)      
 at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)   
    at 
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)     
  at org.eclipse.jetty.server.session.SessionHandle

Thanks,Ayush