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Windows Server Forum / Windows NT / Setup / February 2004Relation of srvany'd application and logon
Given an application started through srvany, why would it 'care' if an active user session ended? Here's what I'm seeing. An application (it happens to be LWS (Lite Web Server)) is started using srvany under the default account. It serves pages just fine. Now I log-off the user account. Suddenly the pages no longer get served. When I log back on, the service still says its running, but still, no pages get served. If I stop and restart the service, the pages start getting served again. The service is set to autostart. If I restart the machine, it will happily serve pages for days, but ceases if I log on and log off the machine. Is this weird, or what? What the H-E double hockey stick is going on here? --Dale-- > Given an application started through srvany, why would it 'care' if an > active user session ended? [quoted text clipped - 11 lines] > > --Dale-- Taken from srvany.wri --------------------------- For WIN32 graphical applications: when the currently logged-in user is logging-off, all WIN32 top-level windows receive WM_QUERYENDSESSION and WM_ENDSESSION messages. Some WIN32 applications choose to terminate upon receipt of such messages. In order for your WIN32 application to survive logoff, it must not do that: instead, your windows procedure should call the default windows procedure on these messages. For WIN32 Console (i.e. character-mode) applications: when the currently logged-in user is logging-off, all Console applications receive a CTRL_LOGOFF_EVENT event from the Console. If your Console application has registered a Console event handler (via SetConsoleCtrlHandler), it must ignore CTRL_LOGOFF_EVENT in order to survive the logoff. > > Given an application started through srvany, why would it 'care' if an > > active user session ended? > Taken from srvany.wri > --------------------------- > For WIN32 Console (i.e. character-mode) applications: when the currently > logged-in user is logging-off, all Console applications receive a > CTRL_LOGOFF_EVENT event from the Console. > If your Console application has registered a Console event handler (via > SetConsoleCtrlHandler), it must ignore CTRL_LOGOFF_EVENT in order to > survive the logoff. David, Thanks for the reply to someone who clearly should have RTFM. Based on your insight, I think now that the solution will almost certainly be run "javaw" instead of "java" to start the web server. The former does not provide a console window. Thanks again. --Dale-- > > Given an application started through srvany, why would it 'care' if an > > active user session ended? > Taken from srvany.wri > --------------------------- > For WIN32 Console (i.e. character-mode) applications: when the currently > logged-in user is logging-off, all Console applications receive a > CTRL_LOGOFF_EVENT event from the Console. > If your Console application has registered a Console event handler (via > SetConsoleCtrlHandler), it must ignore CTRL_LOGOFF_EVENT in order to > survive the logoff. In case someone else comes across this later, let me say that my earlier suggestion that "javaw.exe" instead of "java.exe" would keep the process alive through a logoff was incorrect. The key is to add a parameter "-Xrs" to the java parameter list. Type "java -X" for disclaimers (apparently this set of "X" parameters is subject to change without warning). But it seems to work, so I'm good. --Dale-- |
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