Description of problem:
Pausing and resuming a download of a TM will fail, and an exception will occur under the hood.

Version-Release number of selected component (if applicable):
Dev

How reproducible:
Moderate always

Steps to Reproduce:
Pre: A large TM is installed
1. Go to Administration, Translation Memory
2. Click export on the large download
3. Pause in the browser, wait a few seconds
4. Resume the download in the browser

Actual results:
Download fails, IllegalArgument exception shows a few seconds later on console

Expected results:
If the download cannot resume, then it should be caught and processed as expected.

Additional info:
13:21:41,407 WARN  [org.jboss.seam.mock.MockViewHandler] (http-/127.0.0.1:8080-15) You should catch the exception before Seam: java.lang.IllegalArgumentException: no file extension in servlet path: /rest/tm/bigtest
	at org.jboss.seam.mock.MockViewHandler.getActionURL(MockViewHandler.java:49) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.jsf.SeamViewHandler.getActionURL(SeamViewHandler.java:75) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.faces.FacesManager.redirect(FacesManager.java:168) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.faces.Navigator.redirect(Navigator.java:56) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.faces.Navigator.redirect(Navigator.java:43) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.exception.RedirectHandler.handle(RedirectHandler.java:51) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.exception.Exceptions.handle(Exceptions.java:76) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.web.ExceptionFilter.endWebRequestAfterException(ExceptionFilter.java:114) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:70) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.zanata.seam.interceptor.MonitoringWrapper.doFilter(MonitoringWrapper.java:70) [classes:]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.zanata.servlet.GWTCacheControlFilter.doFilter(GWTCacheControlFilter.java:63) [classes:]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
	at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
	at org.jboss.security.negotiation.NegotiationAuthenticator$WrapperValve.invoke(NegotiationAuthenticator.java:336) [jboss-negotiation-common-2.2.5.Final-redhat-1.jar:2.2.5.Final-redhat-1]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:389) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_37]

13:21:41,409 ERROR [org.jboss.seam.exception.Exceptions] (http-/127.0.0.1:8080-15) handled and logged exception: javax.servlet.ServletException: java.lang.IllegalStateException
	at org.jboss.seam.servlet.ContextualHttpServletRequest.run(ContextualHttpServletRequest.java:96) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.resteasy.ResteasyResourceAdapter.getResource(ResteasyResourceAdapter.java:120) [jboss-seam-resteasy-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.SeamResourceServlet.service(SeamResourceServlet.java:80) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:832) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:620) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:553) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:482) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213) [urlrewritefilter-4.0.4.jar:4.0.4]
	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171) [urlrewritefilter-4.0.4.jar:4.0.4]
	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145) [urlrewritefilter-4.0.4.jar:4.0.4]
	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) [urlrewritefilter-4.0.4.jar:4.0.4]
	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389) [urlrewritefilter-4.0.4.jar:4.0.4]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.zanata.seam.interceptor.MonitoringWrapper.doFilter(MonitoringWrapper.java:70) [classes:]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.zanata.servlet.GWTCacheControlFilter.doFilter(GWTCacheControlFilter.java:63) [classes:]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
	at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
	at org.jboss.security.negotiation.NegotiationAuthenticator$WrapperValve.invoke(NegotiationAuthenticator.java:336) [jboss-negotiation-common-2.2.5.Final-redhat-1.jar:2.2.5.Final-redhat-1]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:389) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_37]
Caused by: java.lang.IllegalStateException
	at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:392) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
	at javax.servlet.http.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:152) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-1.jar:1.0.2.Final-redhat-1]
	at org.jboss.resteasy.plugins.server.servlet.HttpServletResponseWrapper.sendError(HttpServletResponseWrapper.java:109) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.handleFailure(SynchronousDispatcher.java:284) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.handleWriterException(SynchronousDispatcher.java:418) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:238) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.handleWriteResponseException(SynchronousDispatcher.java:222) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:532) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:126) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
	at org.zanata.rest.ZanataResteasyBootstrap$1.invoke(ZanataResteasyBootstrap.java:74) [classes:]
	at org.jboss.seam.resteasy.ResteasyResourceAdapter$1.process(ResteasyResourceAdapter.java:145) [jboss-seam-resteasy-2.3.0.Final.jar:2.3.0.Final]
	at org.jboss.seam.servlet.ContextualHttpServletRequest.run(ContextualHttpServletRequest.java:65) [jboss-seam-2.3.0.Final.jar:2.3.0.Final]
	... 46 more