2016-08-29 08:52:47,936  WARN  [webscripts.connector.RemoteClient] [ajp-apr-8009-exec-4] Exception during close() of HTTP API connection
 org.apache.catalina.connector.ClientAbortException: java.io.IOException: Failed to send AJP message
        at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:407)
        at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:480)
        at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:356)
        at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:308)
        at org.apache.catalina.connector.CoyoteOutputStream.close(CoyoteOutputStream.java:108)
        at org.springframework.extensions.webscripts.connector.RemoteClient.copyResponseStreamOutput(RemoteClient.java:1411)
        at org.alfresco.web.scripts.SlingshotRemoteClient.copyResponseStreamOutput(SlingshotRemoteClient.java:192)
        at org.springframework.extensions.webscripts.connector.RemoteClient.service(RemoteClient.java:1267)
        at org.springframework.extensions.webscripts.connector.RemoteClient.call(RemoteClient.java:800)
        at org.springframework.extensions.webscripts.connector.HttpConnector.call(HttpConnector.java:143)
        at org.springframework.extensions.webscripts.connector.AuthenticatingConnector.call(AuthenticatingConnector.java:297)
        at org.springframework.extensions.webscripts.servlet.mvc.EndPointProxyController.handleRequestInternal(EndPointProxyController.java:326)
        at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
        at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:855)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:747)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:485)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:410)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:337)
        at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
        at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
        at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
        at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
        at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.alfresco.web.site.servlet.SecurityHeadersFilter.doFilter(SecurityHeadersFilter.java:182)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.alfresco.web.site.servlet.CSRFFilter.doFilter(CSRFFilter.java:315)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.alfresco.web.site.servlet.SSOAuthenticationFilter.doFilter(SSOAuthenticationFilter.java:450)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.alfresco.web.site.servlet.MTAuthenticationFilter.doFilter(MTAuthenticationFilter.java:74)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
        at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:188)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
        at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
        at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: Failed to send AJP message
        at org.apache.coyote.ajp.AjpAprProcessor.output(AjpAprProcessor.java:297)
        at org.apache.coyote.ajp.AbstractAjpProcessor$SocketOutputBuffer.doWrite(AbstractAjpProcessor.java:1264)
        at org.apache.coyote.Response.doWrite(Response.java:499)
        at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:402)
        ... 64 more