Error in importing "Failed to import documents. Reason: Form too many keys"

2014-12-24 19:36:24.686:INFO::Server started, you can now open http://Amrut.cybe
roam.com:8080/ in your browser to access your wiki.
2014-12-24 19:36:24.686:INFO::----------------------------------
2014-12-24 19:41:41,535 http://amrut.cyberoam.com:8080/xwiki/bin/view/Main/ IN
FO .HibernateDataMigrationManager - Storage schema updates and data migrations
are enabled
2014-12-24 19:41:41,539 http://amrut.cyberoam.com:8080/xwiki/bin/view/Main/ IN
FO .HibernateDataMigrationManager - No data migration to apply for database [xw
iki] currently in version [54600]
2014-12-24 19:41:41,539 http://amrut.cyberoam.com:8080/xwiki/bin/view/Main/ IN
FO .HibernateDataMigrationManager - Checking Hibernate mapping and updating sch
ema if needed for wiki [xwiki]
2014-12-24 19:46:50.956:WARN:oejs.ServletHandler:/xwiki/bin/import/XWiki/XWikiPr
eferences
java.lang.IllegalStateException: Form too many keys
at org.eclipse.jetty.util.UrlEncoded.decodeUtf8To(UrlEncoded.java:508)
at org.eclipse.jetty.util.UrlEncoded.decodeTo(UrlEncoded.java:601)
at org.eclipse.jetty.server.Request.extractParameters(Request.java:355)
at org.eclipse.jetty.server.Request.getParameterValues(Request.java:808)

at javax.servlet.ServletRequestWrapper.getParameterValues(ServletRequest
Wrapper.java:211)
at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilt
er$SavedRequestWrapper.getParameterValues(SavedRequestRestorerFilter.java:146)
at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionF
ilter.java:90)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.ja
va:66)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilt
er.doFilter(SavedRequestRestorerFilter.java:208)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilt
er.doFilter(SetCharacterEncodingFilter.java:111)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java
:455)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.j
ava:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.jav
a:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandl
er.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandl
er.java:1075)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:
384)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandle
r.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandle
r.java:1009)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.j
ava:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(Cont
extHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerColl
ection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper
.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:368)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(Abstrac
tHttpConnection.java:488)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpC
onnection.java:943)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.conten
t(AbstractHttpConnection.java:1004)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)

at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnecti
on.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEn
dPoint.java:628)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEnd
Point.java:52)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPoo
l.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool
.java:543)
at java.lang.Thread.run(Unknown Source)
2014-12-24 19:47:26.219:WARN:oejs.ServletHandler:/xwiki/bin/import/XWiki/XWikiPr
eferences
java.lang.IllegalStateException: Form too many keys
at org.eclipse.jetty.util.UrlEncoded.decodeUtf8To(UrlEncoded.java:508)
at org.eclipse.jetty.util.UrlEncoded.decodeTo(UrlEncoded.java:601)
at org.eclipse.jetty.server.Request.extractParameters(Request.java:355)
at org.eclipse.jetty.server.Request.getParameterValues(Request.java:808)

at javax.servlet.ServletRequestWrapper.getParameterValues(ServletRequest
Wrapper.java:211)
at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilt
er$SavedRequestWrapper.getParameterValues(SavedRequestRestorerFilter.java:146)
at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionF
ilter.java:90)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.ja
va:66)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilt
er.doFilter(SavedRequestRestorerFilter.java:208)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilt
er.doFilter(SetCharacterEncodingFilter.java:111)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet
Handler.java:1419)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java
:455)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.j
ava:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.jav
a:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandl
er.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandl
er.java:1075)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:
384)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandle
r.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandle
r.java:1009)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.j
ava:135)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(Cont
extHandlerCollection.java:255)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerColl
ection.java:154)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper
.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:368)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(Abstrac
tHttpConnection.java:488)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpC
onnection.java:943)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.conten
t(AbstractHttpConnection.java:1004)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)

at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnecti
on.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEn
dPoint.java:628)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEnd
Point.java:52)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPoo
l.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool
.java:543)
at java.lang.Thread.run(Unknown Source)