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Re: [Wrapper-user] NT Service Issues
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From: Bashiro <ba...@en...> - 2005-02-25 08:51:53
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Hi Adam, I am not sure what Leif's suggestion will be. But to my understanding it is easy using the intergration method 1 as you are using. But in your case, if I understand correctly. Using intergration method 3 will help you out of the problem. That is; you will have controll over the wrapper and do some codings yourself. Hence you will be in charge how you want the wrapper to play (in some way). bashiro > Hi all, > > We are trialling using the Java Service Wrapper for our product and so far > are very impressed. We do however have two major issues that appear to > manifest themselves mostly under Windows 2003 Server. > > To explain our issues, I'll first give some background on what our > application does. Our application consists of 5 java processes, plus one > we call the ServiceManager. The ServiceManager upon startup starts each of > the other 5 processes by calling Runtime.getRuntime().exec(). It then > continually checks that they are alive, and if not restarts them. It also > has a Runtime.getRuntime().addShutdownHook() to ensure that its child > processes are shutdown when it is shutdown. > > We are using the Java Service Wrapper (3.1.1) to wrap our ServiceManager > by simply specifying our classname in the conf file. Our problems are as > follows: > > 1. When certain users log off from the server (via Remote Desktop), > although the logs specify that the logged off signal is ignored, the child > processes (ran via Runtime.getRuntime().exec() are killed). > > e.g. > INFO | wrapper | 2005/02/14 15:22:14 | User logged out. Ignored. > INFO | jvm 1 | 2005/02/14 15:22:14 | 15:22:14,421 INFO > [ServiceRunner] Starting service scheduler > INFO | jvm 1 | 2005/02/14 15:22:15 | 15:22:14,968 INFO > [ServiceRunner] Starting service authenticator > INFO | jvm 1 | 2005/02/14 15:22:15 | 15:22:14,984 INFO > [ServiceRunner] Starting service freetext > INFO | jvm 1 | 2005/02/14 15:22:15 | 15:22:15,015 INFO > [ServiceRunner] Starting service conversion > > The ServiceRunner INFO messages are from our ServiceManager which is still > running, but detecting the other service have shutdown so is restarting > them. > > This is a problem as we are a web app, and users logged into our system > will be kicked out as their sessions are tied to these running apps. > > Is there any way of preventing "child" processes of the wrapped service > from also being killed? > > > 2. Every now and then, presumably when the server is under load, the JVM > is terminated. This presents two problems, firstly that it is happening, > and secondly that it doesn't call our shutdown hook, so the child > processes aren't killed, but then when it is restarted by the service > wrapper, the child processes are all started for a second time, leading to > catastropic consequences to our application! > > INFO | jvm 1 | 2005/02/16 09:44:07 | 09:44:07,659 INFO > [ServiceRunner] Starting service conversion > ERROR | wrapper | 2005/02/17 08:13:29 | JVM appears hung: Timed out > waiting for signal from JVM. > ERROR | wrapper | 2005/02/17 08:13:29 | JVM did not exit on request, > terminated > STATUS | wrapper | 2005/02/17 08:13:34 | Launching a JVM... > INFO | jvm 2 | 2005/02/17 08:13:35 | Wrapper (Version 3.1.1) > http://wrapper.tanukisoftware.org > INFO | jvm 2 | 2005/02/17 08:13:35 | > INFO | jvm 2 | 2005/02/17 08:13:35 | 08:13:35,375 INFO [RpcHandler] > RPC: invoking start > INFO | jvm 2 | 2005/02/17 08:13:35 | 08:13:35,375 INFO > [ServiceHandler] Reading configuration file > INFO | jvm 2 | 2005/02/17 08:13:35 | 08:13:35,406 INFO > [ServiceRunner] Starting service resourcecentre > INFO | jvm 2 | 2005/02/17 08:13:37 | 08:13:37,250 INFO > [ServiceRunner] Starting service resourcecentre > INFO | jvm 2 | 2005/02/17 08:13:39 | 08:13:39,000 INFO > [ServiceRunner] Starting service resourcecentre > INFO | jvm 2 | 2005/02/17 08:13:40 | 08:13:40,406 INFO > [ServiceRunner] Starting service freetext > INFO | jvm 2 | 2005/02/17 08:13:40 | 08:13:40,734 INFO > [ServiceRunner] Starting service resourcecentre > INFO | jvm 2 | 2005/02/17 08:13:42 | 08:13:42,578 INFO > [ServiceRunner] Starting service resourcecentre > > Is there any way to prevent the JVM appearing as hung when it isn't > really? > > > > > Look forward to hearing back from anyone! > > Cheers, Adam > > Adam Eijdenberg > DYTECH SOLUTIONS Pty. Ltd. > ----------------------------------- > > Level 2, 25 Argyle Street > GPO Box 642 > Hobart TAS 7000 > Ph: +61 3 6235 2222 > Fax: +61 3 6235 2299 > ada...@dy... > www.dytech.com.au > ----------------------------------- > > > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_ide95&alloc_id396&op=click > _______________________________________________ > Wrapper-user mailing list > Wra...@li... > https://lists.sourceforge.net/lists/listinfo/wrapper-user > |
