Hi all,

since yesterday we can not access sometime our DSpace.
We receive a empty browser with wait or sometimes we can not access bitstreams:


After a restart from the tomcat-procress dspace works fine but only for a short time.

In the logfile we receive tho following error message:


2018-02-08 11:51:54,047 ERROR org.dspace.app.xmlui.cocoon.DSpaceCocoonServletFilter @ Serious Error Occurred Processing Request! javax.servlet.ServletException: org.apache.cocoon.ProcessingException: Sitemap: error invoking action at <map:act type="locale"> - file:///dspace/sw/tomcat/webapps/xmlui/sitemap.xmap:762:64 at org.apache.cocoon.servlet.RequestProcessor.service(RequestProcessor.java:230) at org.apache.cocoon.sitemap.SitemapServlet.service(SitemapServlet.java:84)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:468) at org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:443) at org.apache.cocoon.servletservice.spring.ServletFactoryBean$ServiceInterceptor.invoke(ServletFactoryBean.java:264) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    at com.sun.proxy.$Proxy83.service(Unknown Source)
    at org.dspace.springmvc.CocoonView.render(CocoonView.java:113)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1180) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:950) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.dspace.app.xmlui.cocoon.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.dspace.app.xmlui.cocoon.DSpaceCocoonServletFilter.doFilter(DSpaceCocoonServletFilter.java:274) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartFilter.doFilter(DSpaceMultipartFilter.java:119) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1152) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:622) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.cocoon.ProcessingException: Sitemap: error invoking action at <map:act type="locale"> - file:///dspace/sw/tomcat/webapps/xmlui/sitemap.xmap:762:64 at org.apache.cocoon.ProcessingException.throwLocated(ProcessingException.java:111) at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:141) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78) at org.apache.cocoon.components.treeprocessor.sitemap.SwitchSelectNode.invoke(SwitchSelectNode.java:88) at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:78) at org.apache.cocoon.components.treeprocessor.sitemap.HandleErrorsNode.invoke(HandleErrorsNode.java:78) at org.apache.cocoon.components.treeprocessor.sitemap.ErrorHandlerHelper.prepareErrorHandler(ErrorHandlerHelper.java:157) at org.apache.cocoon.components.treeprocessor.sitemap.ErrorHandlerHelper.prepareErrorHandler(ErrorHandlerHelper.java:124) at org.apache.cocoon.components.treeprocessor.sitemap.ErrorHandlerHelper.invokeErrorHandler(ErrorHandlerHelper.java:94) at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:89) at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:239) at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:171) at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:247) at org.apache.cocoon.servlet.RequestProcessor.process(RequestProcessor.java:351) at org.apache.cocoon.servlet.RequestProcessor.service(RequestProcessor.java:169)
    ... 49 more
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:114) at org.dspace.storage.rdbms.DatabaseManager.getConnection(DatabaseManager.java:619)
    at org.dspace.core.Context.init(Context.java:121)
    at org.dspace.core.Context.<init>(Context.java:95)
at org.dspace.app.xmlui.utils.ContextUtil.obtainContext(ContextUtil.java:88) at org.dspace.app.xmlui.utils.ContextUtil.obtainContext(ContextUtil.java:53) at org.dspace.app.xmlui.cocoon.DSpaceLocaleAction.act(DSpaceLocaleAction.java:109) at org.apache.cocoon.sitemap.impl.DefaultExecutor.invokeAction(DefaultExecutor.java:55) at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:105)
    ... 62 more

Best Regards Kosmas

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