Hi wanghe, Neither vpp 21.01 nor jvpp are supported, so your only options are to try back porting fixes from newer versions, if any exist, or to debug the problem.
As previously mentioned, the deadlock seem to be in a reply message, so the issue is probably in the java/c++ implementation of the binary api client or the way the api is used by the client. Either the api client is not dequeueing messages, e.g., maybe it’s stuck waiting on vpp, or, if did dequeue, it did not broadcast on the condvar or the broadcast was missed by vpp. Try to check what your api client is doing. That might shed some light on the issue. Hope this helps. Regards, Florin > On May 27, 2022, at 7:57 PM, NUAA无痕 <nuaawan...@gmail.com> wrote: > > Hi，florin > > I would appreciate it if you can resolve it > > My project use java web to control vpp, many binary api are used, such as > interfaces, ip, our customize api etc. > > half a year ago， i use one c++ restful framework ( google‘s pistache) to use > vpp binary api, there also has deadlock problem , then i don't know to send > mail for help (dont know must subscribe mail can send mail to vpp-dev haha) > > i think maybe i m not proficient with c++ multithreading that cause deadlock, > that time i fount if use one thread also api communication will deadlock > > so i think many times use api will cause vpp deadlock > > For resolve this problem, we decide to change it to jvpp, maybe jvpp resolve > this deadlock （now this problem also exist） > > i found git log for vpp new version that vpp resolve a deadlock about svm （i > dont know if it can resolve this）, but now we update vpp need at least one > month （maybe too long） > > So florin expert , can you analyze this problem? thank you very much! > > Best regards > wanghe > > > > > Florin Coras <fcoras.li...@gmail.com <mailto:fcoras.li...@gmail.com>> > 于2022年5月28日周六 01:02写道： > Hi wanghe, > > Unfortunately, jvpp is no longer supported so probably there’s no recent fix > for the issue you’re hitting. By the looks of it, an api msg handler is > trying to enqueue something (probably a reply towards the client) and ends up > stuck because the svm queue is full and a condvar broadcast never comes. > > If you really need to fix this, I’d check jvpp code to see if condvar > broadcasts on dequeue are done properly. > > Regards, > Florin > > > On May 27, 2022, at 12:53 AM, NUAA无痕 <nuaawan...@gmail.com > > <mailto:nuaawan...@gmail.com>> wrote: > > > > Hi, vpp experts > > > > im use vpp 2101 version > > my project use jvpp communicate with vpp by binary api, but now when long > > time run(about 14h) it will deadlock, this is info > > > > 0x00007f2687783a35 in pthread_cond_wait@@GLIBC_2.3.2 () from > > /usr/lib64/libpthread.so.0 > > (gdb) bt > > #0 0x00007f2687783a35 in pthread_cond_wait@@GLIBC_2.3.2 () from > > /usr/lib64/libpthread.so.0 > > #1 0x00007f2688f198e6 in svm_queue_add () from > > /usr/local/zfp/lib/libsvm.so.21.01.1 > > #2 0x000055cdda6856f3 in ?? () > > #3 0x00007f268904c909 in vl_msg_api_handler_with_vm_node () from > > /usr/local/zfp/lib/libvlibmemory.so.21.01.1 > > #4 0x00007f2689033521 in vl_mem_api_handle_msg_main () from > > /usr/local/zfp/lib/libvlibmemory.so.21.01.1 > > #5 0x00007f2689043fce in ?? () from > > /usr/local/zfp/lib/libvlibmemory.so.21.01.1 > > #6 0x00007f2688fba5a7 in ?? () from /usr/local/zfp/lib/libvlib.so.21.01.1 > > #7 0x00007f2688ef8de0 in clib_calljmp () from > > /usr/local/zfp/lib/libvppinfra.so.21.01.1 > > #8 0x00007f263d673dd0 in ?? () > > #9 0x00007f2688fbdf67 in ?? () from /usr/local/zfp/lib/libvlib.so.21.01.1 > > #10 0x0000000000000000 in ?? () > > > > because i use release version so some info is not show, i found that vpp > > new version has change a lot about svm. > > > > for some reason，i need some time to update vpp and now must resolve this > > problem > > > > so experts can you give patch for this bug for vpp 2101 version > > > > Best regards > > wanghe > > > > > > >
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