ConcurrentModificationException from BinaryResponseWriter

ConcurrentModificationException thrown from BinaryResponseWriter while writing SolrDocument to the response.

SEVERE: java.util.ConcurrentModificationException
at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:373)
at java.util.LinkedHashMap$KeyIterator.next(LinkedHashMap.java:384)
at org.apache.solr.response.BinaryResponseWriter$Resolver.resolve(BinaryResponseWriter.java:98)
at org.apache.solr.common.util.JavaBinCodec.writeKnownType(JavaBinCodec.java:242)
at org.apache.solr.common.util.JavaBinCodec.writeVal(JavaBinCodec.java:139)
at org.apache.solr.common.util.JavaBinCodec.writeArray(JavaBinCodec.java:377)
at org.apache.solr.common.util.JavaBinCodec.writeSolrDocumentList(JavaBinCodec.java:340)
at org.apache.solr.common.util.JavaBinCodec.writeKnownType(JavaBinCodec.java:226)
at org.apache.solr.common.util.JavaBinCodec.writeVal(JavaBinCodec.java:139)
at org.apache.solr.common.util.JavaBinCodec.writeNamedList(JavaBinCodec.java:134)
at org.apache.solr.common.util.JavaBinCodec.writeKnownType(JavaBinCodec.java:222)
at org.apache.solr.common.util.JavaBinCodec.writeVal(JavaBinCodec.java:139)
at org.apache.solr.common.util.JavaBinCodec.marshal(JavaBinCodec.java:87)
at org.apache.solr.response.BinaryResponseWriter.write(BinaryResponseWriter.java:49)
at org.apache.solr.servlet.SolrDispatchFilter.writeResponse(SolrDispatchFilter.java:333)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:261)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)