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  1. ,
    Expert tip

    Check if your server (or a proxy server) is not going up and down. There might be something between a proxy and a client sending intermittent requests to non-functioning hosts as well. There might as well be too many requests in a short amount of time.

  2. ,
    Expert tip

    Check if your server (or a proxy server) is not going up and down. There might be something between a proxy and a client sending intermittent requests to non-functioning hosts as well. There might as well be too many requests in a short amount of time.

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java.net.ConnectException: Connection timed out	at java.net.PlainSocketImpl.socketConnect(Native Method)	at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)	at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)	at java.net.Socket.connect(Socket.java:529)	at oracle.net.nt.MetricsEnabledSocket.connect(TcpNTAdapter.java:619)	at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:164)	at oracle.net.nt.ConnOption.connect(ConnOption.java:134)	at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:357)	at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:426)	at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:710)	at oracle.net.ns.NSProtocol.connect(NSProtocol.java:256)	at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1176)	at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:318)	at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:670)	at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:230)	at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:34)	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:567)	at java.sql.DriverManager.getConnection(DriverManager.java:582)	at java.sql.DriverManager.getConnection(DriverManager.java:185)	at oracle.xdo.security.OraValidator.getImpConnection(OraValidator.java:196)	at oracle.xdo.security.OraValidator.getAdminConnection(OraValidator.java:170)	at oracle.xdo.security.OraValidator.getAllRoles(OraValidator.java:233)	at oracle.xdo.servlet.security.ORCLDBSecurityHandler.getAllRolenames(ORCLDBSecurityHandler.java:98)	at oracle.xdo.servlet.resources.catalog.CatalogServiceUtil.createAccessPermission(CatalogServiceUtil.java:2425)	at oracle.xdo.servlet.resources.catalog.ResourceCatalogServiceImpl.getChildren(ResourceCatalogServiceImpl.java:573)	at oracle.xdo.servlet.resources.catalog.ResourceCatalogServiceImpl.getChildren(ResourceCatalogServiceImpl.java:491)	at oracle.xdo.servlet.resources.catalog.MostRecentCatalogServiceWrapper.getChildren(MostRecentCatalogServiceWrapper.java:172)	at oracle.xdo.servlet.resources.action.CatalogTreeAction.printTree(CatalogTreeAction.java:83)	at oracle.xdo.servlet.resources.action.CatalogTreeAction.execute(CatalogTreeAction.java:42)	at oracle.xdo.servlet.resources.action.ActionServlet.service(ActionServlet.java:45)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)	at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.xdo.servlet.metadata.track.MostRecentFilter.doFilter(MostRecentFilter.java:64)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.xdo.servlet.security.SecurityFilter.doFilter(SecurityFilter.java:122)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.xdo.servlet.init.InitCheckingFilter.doFilter(InitCheckingFilter.java:63)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)	at java.security.AccessController.doPrivileged(Native Method)	at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)	at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)	at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)	at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)	at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)	at java.security.AccessController.doPrivileged(Native Method)	at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)	at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)	at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)	at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)	at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)	at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)	at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)	at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)	at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)