P.S. JamVM has several tracing options, most of which need to be enabled at configuration time. Do ./configure --help to find out which ones are available. Then enable using --enable-traceX, e.g: ./configure --enable-tracethread --enable-tracealloc Rob. 2009/7/15 Robert Lougher <rob.lougher@xxxxxxxxx>: > Hi, > > Quick reply: > > 1) You can get a dump of all the threads and their stack traces by > sending SIGQUIT to the jamvm process (find the process ID via ps or > top), e.g. > > kill -3 <process ID> > > JamVM will dump the thread state and continue. > > If you launched JamVM from a terminal you can also do Ctrl-\ in the > terminal, which will send SIGQUIT. > > 2) Attach gdb to jamvm and inspect the threads, e.g.: > > gdb jamvm <process ID> > > list all threads with: > > info threads > > then, for each interesting thread: > > thread <thread no> > bt > > 3) Run JamVM with strace > > This will dump information about every system call being executed. > However, if it takes two hours to hang this will probably be far too > much information. > > Rob. > > 2009/7/15 ragoel <ragoel@xxxxxxxxxxxxxxxxxxx>: >> >> Problem: JAM VM hangs after running for ~2 hours. There is no response from >> jetty (running on jamvm) at this time. >> >> The environment is: >> - the jam vm version is JamVM 1.5.3 >> - GNU Classpath version is 0.98 >> - the GNU Classpath is build by disabling the following things as they are >> not required by us: >> . /configure --disable-gtk-peer --disable-plugin --disable-gconf-peer >> --enable-tools >> - we are running jetty 6.1.8 using the jam vm. >> - we are connecting to the jetty (which is running on jamvm), through the >> browser (IE7) on port 8080, but there is no response from the server. >> - Our code runs fine when it is running jetty on sun jre 1.5. So it is >> certain that the problem is with the jamvm >> - the linux platform is: debian >> - After some analysis, it seems that there is some bug in the socket library >> of GNU Classpath due to which it stops responding after running for >> sometime. >> >> Queries: Basically we are not able to do anything when the JAMVM hangs, so >> could someone please tell me about how to debug the jamvm when it hangs i.e. >> - Is there any hook so that we can attach something to it, >> - Can we debug it remotely, >> - How to enable logging in it? >> - Any tool which can aid us in analyzing this problem further? >> >> We are stuck on this; please provide your valuable suggestions/resolutions >> for the same? >> -- >> View this message in context: http://www.nabble.com/JAM-VM-hangs-after-running-for-%7E2-hours.-tp24494239p24494239.html >> Sent from the Gnu - Classpath - General mailing list archive at Nabble.com. >> >> >> >
