Hi florin, Thanks for your suggestion, i will update vpp to new version for this question
In addition that is vpp has example for c++/java binary api use， so i can compare it with our project code our c++ code refer to https://pantheon.tech/vpp-101-plugins-binary-api/ Thank u very much Best regards wanghe Florin Coras <fcoras.li...@gmail.com> 于2022年5月29日周日 03:37写道： > 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> 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> 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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