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Hi Wen, Could be but I will ask the client developer about it. For now, let's let it run idle for a while and hen see if it gets itself into that state. Andy On Sat, 10 Oct 2009, wen guan wrote: > Hi andrew, > > I only found it happened in slc5 machines with version > xrootd-20090623(x86_64_linux_26,g++ (GCC) 3.4.6 20060404 (Red Hat > 3.4.6-9) binary version) . Sometimes I even cannot kill "XrdCnsd" with > "Kill" command. I need to use "Kill -9 " to kill it. > Last night I downloaded xrootd-20090904 src version and compiled it > locally. Until now I haven't found this problem again. Maybe the > problem is related to gcc. > > Thanks > Wen > > On Sat, Oct 10, 2009 at 3:17 AM, Andrew Hanushevsky > <[log in to unmask]> wrote: >> Hi Wen, >> >> OK. Does this only happen in SLC5 or does it happen in all kernels. >> >> Andy >> >> On Fri, 9 Oct 2009, wen guan wrote: >> >>> Hi Andrew, >>> >>> For newly started XrdCnsd, when doing a xrdcp, the >>> disappeared "poll" thread will appear again and an shadow will be >>> created in cns server. But for old Xrdcnsd, when doing xrdcp, no >>> "poll" thread will be started. no shadow will be created in cns >>> server. >>> >>> Wen >>> >>> On Fri, Oct 9, 2009 at 12:58 AM, Andrew Hanushevsky <[log in to unmask]> >>> wrote: >>>> >>>> Hi Wen, >>>> >>>> I guess I don't understand the actual problem. When you say 'not respond" >>>> what do you actually see to come to that conclusion. As for the analysis, >>>> and stack traces, these are all perfectly normal. The "poll" thread need >>>> not >>>> exist at all times and, in fact, will disappear after a long period of >>>> inactivity. I will look some more but I need to know what "no response" >>>> appears like. >>>> >>>> Andy >>>> >>>> ----- Original Message ----- From: "wen guan" <[log in to unmask]> >>>> To: <[log in to unmask]> >>>> Sent: Tuesday, October 06, 2009 12:46 PM >>>> Subject: XrdCnsd problem in slc5 with version xrootd-20090623 >>>> >>>> >>>>> Hi, >>>>> >>>>> The XrdCnsd in xrootd-20090623 failed to create cns frequestly. >>>>> When starting XrdCnsd, it works fine. But when trying it next day, it >>>>> will not response. Below is the test result. >>>>> >>>>> It seems the "poll" thread cannot be started for old XrdCnsd(started >>>>> more than one day and there is no active in long time(maybe 780s)). >>>>> For (*), Process 10816 was an old XrdCnsd(started more than one day) >>>>> process which didn't response. After killed it, a new process 13665 >>>>> was created which worked fine. From here we can see process 13665 had >>>>> a thread "poll"(thread 2) but process 10816 didn't have it. >>>>> For (**), When there was no files copied to xrootd for 10 minutes, >>>>> the "poll" thread in Process 13665 disappeared. But when I did a >>>>> xrdcp to this server. We will saw this "poll" thread again. But for >>>>> process which has on active for long time, the "poll" thread cannot be >>>>> restart again. >>>>> >>>>> (*) >>>>> [root@pcuwdata12 ~]# ps -ef|grep xrootd-2 >>>>> xrootd 10798 1 0 Oct02 ? 00:21:21 >>>>> /opt/xrootd-20090623/bin//xrootd -b -d -R xrootd -l >>>>> /tmp/log/xrootd/xrd.log -c /opt/xrootd-20090623/conf/xrdcluster.cfg >>>>> xrootd 10809 1 0 Oct02 ? 00:00:05 >>>>> /opt/xrootd-20090623/bin//cmsd -b -d -R xrootd -l >>>>> /tmp/log/xrootd/cms.log -c /opt/xrootd-20090623/conf/xrdcluster.cfg >>>>> xrootd 10816 10798 0 Oct02 ? 00:00:00 >>>>> /opt/xrootd-20090623/bin/XrdCnsd -d -l /tmp/log/xrootd/cnsd.log >>>>> root://pcuwsun04.cern.ch:1095 >>>>> root 13452 13340 0 20:59 pts/1 00:00:00 grep xrootd-2 >>>>> [root@pcuwdata12 ~]# pstack 10816 >>>>> Thread 7 (Thread 0x410cf940 (LWP 10826)): >>>>> #0 0x000000370e40ae00 in pthread_cond_timedwait@@GLIBC_2.3.2 () >>>>> #1 0x0000000000479707 in XrdSysCondVar::Wait () >>>>> #2 0x000000000047b8e9 in XrdScheduler::TimeSched () >>>>> #3 0x000000000047a21d in XrdStartTSched () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 6 (Thread 0x416ed940 (LWP 10827)): >>>>> #0 0x000000370e40c9b1 in sem_wait () from /lib64/libpthread.so.0 >>>>> #1 0x000000000041ffb7 in XrdSysSemaphore::Wait () >>>>> #2 0x000000000047ae11 in XrdScheduler::Run () >>>>> #3 0x000000000047a241 in XrdStartWorking () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 5 (Thread 0x417ee940 (LWP 10828)): >>>>> #0 0x000000370e40c9b1 in sem_wait () from /lib64/libpthread.so.0 >>>>> #1 0x000000000041ffb7 in XrdSysSemaphore::Wait () >>>>> #2 0x000000000047ae11 in XrdScheduler::Run () >>>>> #3 0x000000000047a241 in XrdStartWorking () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 4 (Thread 0x418ef940 (LWP 10834)): >>>>> #0 0x000000370e40d5cb in read () from /lib64/libpthread.so.0 >>>>> #1 0x00000000004736b9 in XrdOucStream::GetLine () >>>>> #2 0x000000000041eb06 in XrdCnsDaemon::getEvents () >>>>> #3 0x000000000041dcfc in CnsEvents () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 3 (Thread 0x419f0940 (LWP 10835)): >>>>> #0 0x000000370e40d174 in __lll_lock_wait () from /lib64/libpthread.so.0 >>>>> #1 0x000000370e408aca in _L_lock_1034 () from /lib64/libpthread.so.0 >>>>> #2 0x000000370e40898c in pthread_mutex_lock () from >>>>> /lib64/libpthread.so.0 >>>>> #3 0x000000000041ff5b in XrdSysMutex::Lock () >>>>> #4 0x000000000041f6d4 in XrdCnsEvent::Queue () >>>>> #5 0x000000000041ee43 in XrdCnsDaemon::getEvents () >>>>> #6 0x000000000041dcfc in CnsEvents () >>>>> #7 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #8 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #9 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 2 (Thread 0x41af1940 (LWP 11659)): >>>>> #0 0x000000370d89a0b1 in nanosleep () from /lib64/libc.so.6 >>>>> #1 0x000000370d899ed4 in sleep () from /lib64/libc.so.6 >>>>> #2 0x000000000044117a in GarbageCollectorThread () >>>>> #3 0x000000000045413a in XrdClientThreadDispatcher () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 1 (Thread 0x2b53e8698db0 (LWP 10816)): >>>>> #0 0x000000370e40c9b1 in sem_wait () from /lib64/libpthread.so.0 >>>>> #1 0x000000000041ffb7 in XrdSysSemaphore::Wait () >>>>> #2 0x000000000041f8bd in XrdCnsEvent::Remove () >>>>> #3 0x000000000041ea05 in XrdCnsDaemon::doRequests () >>>>> #4 0x00000000004202d1 in main () >>>>> [root@pcuwdata12 ~]# kill 10816 >>>>> [root@pcuwdata12 ~]# kill 10816 >>>>> -bash: kill: (10816) - No such process >>>>> [root@pcuwdata12 ~]# ps -ef|grep xrootd-2 >>>>> xrootd 10798 1 0 Oct02 ? 00:21:21 >>>>> /opt/xrootd-20090623/bin//xrootd -b -d -R xrootd -l >>>>> /tmp/log/xrootd/xrd.log -c /opt/xrootd-20090623/conf/xrdcluster.cfg >>>>> xrootd 10809 1 0 Oct02 ? 00:00:05 >>>>> /opt/xrootd-20090623/bin//cmsd -b -d -R xrootd -l >>>>> /tmp/log/xrootd/cms.log -c /opt/xrootd-20090623/conf/xrdcluster.cfg >>>>> xrootd 13665 10798 0 21:03 ? 00:00:00 >>>>> /opt/xrootd-20090623/bin/XrdCnsd -d -l /tmp/log/xrootd/cnsd.log >>>>> root://pcuwsun04.cern.ch:1095 >>>>> root 13678 13340 0 21:03 pts/1 00:00:00 grep xrootd-2 >>>>> [root@pcuwdata12 ~]# pstack 13665 >>>>> Thread 8 (Thread 0x4074b940 (LWP 13666)): >>>>> #0 0x000000370e40ae00 in pthread_cond_timedwait@@GLIBC_2.3.2 () >>>>> #1 0x0000000000479707 in XrdSysCondVar::Wait () >>>>> #2 0x000000000047b8e9 in XrdScheduler::TimeSched () >>>>> #3 0x000000000047a21d in XrdStartTSched () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 7 (Thread 0x41b0f940 (LWP 13667)): >>>>> #0 0x000000370e40c9b1 in sem_wait () from /lib64/libpthread.so.0 >>>>> #1 0x000000000041ffb7 in XrdSysSemaphore::Wait () >>>>> #2 0x000000000047ae11 in XrdScheduler::Run () >>>>> #3 0x000000000047a241 in XrdStartWorking () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 6 (Thread 0x41d8c940 (LWP 13668)): >>>>> #0 0x000000370e40c9b1 in sem_wait () from /lib64/libpthread.so.0 >>>>> #1 0x000000000041ffb7 in XrdSysSemaphore::Wait () >>>>> #2 0x000000000047ae11 in XrdScheduler::Run () >>>>> #3 0x000000000047a241 in XrdStartWorking () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 5 (Thread 0x41e8d940 (LWP 13669)): >>>>> #0 0x000000370e40d5cb in read () from /lib64/libpthread.so.0 >>>>> #1 0x00000000004736b9 in XrdOucStream::GetLine () >>>>> #2 0x000000000041eb06 in XrdCnsDaemon::getEvents () >>>>> #3 0x000000000041dcfc in CnsEvents () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 4 (Thread 0x41f8e940 (LWP 13670)): >>>>> #0 0x000000370e40d5cb in read () from /lib64/libpthread.so.0 >>>>> #1 0x00000000004736b9 in XrdOucStream::GetLine () >>>>> #2 0x000000000041eb06 in XrdCnsDaemon::getEvents () >>>>> #3 0x000000000041dcfc in CnsEvents () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 3 (Thread 0x4208f940 (LWP 13671)): >>>>> #0 0x000000370d89a0b1 in nanosleep () from /lib64/libc.so.6 >>>>> #1 0x000000370d899ed4 in sleep () from /lib64/libc.so.6 >>>>> #2 0x000000000044117a in GarbageCollectorThread () >>>>> #3 0x000000000045413a in XrdClientThreadDispatcher () >>>>> #4 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #5 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #6 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 2 (Thread 0x41279940 (LWP 13672)): >>>>> #0 0x000000370d8cae46 in poll () from /lib64/libc.so.6 >>>>> #1 0x000000000046b945 in XrdClientSock::RecvRaw () >>>>> #2 0x000000000044e08c in XrdClientPhyConnection::ReadRaw () >>>>> #3 0x000000000044ac3e in XrdClientMessage::ReadRaw () >>>>> #4 0x000000000044e84c in XrdClientPhyConnection::BuildMessage () >>>>> #5 0x000000000044b730 in SocketReaderThread () >>>>> #6 0x000000000045413a in XrdClientThreadDispatcher () >>>>> #7 0x0000000000479637 in XrdSysThread_Xeq () >>>>> #8 0x000000370e4064a7 in start_thread () from /lib64/libpthread.so.0 >>>>> #9 0x000000370d8d3c2d in clone () from /lib64/libc.so.6 >>>>> Thread 1 (Thread 0x2b06bb478db0 (LWP 13665)): >>>>> #0 0x000000370e40c9b1 in sem_wait () from /lib64/libpthread.so.0 >>>>> #1 0x000000000041ffb7 in XrdSysSemaphore::Wait () >>>>> #2 0x000000000041f8bd in XrdCnsEvent::Remove () >>>>> #3 0x000000000041ea05 in XrdCnsDaemon::doRequests () >>>>> #4 0x00000000004202d1 in main () >>>>> [root@pcuwdata12 ~]# >>>>> [root@pcuwdata12 ~]# >>>>> >>>>> >>>>> (***) cnsd.log >>>>> 091006 20:56:10 1828 XrdCnsSched: running underused thread monitor inq=0 >>>>> 091006 20:56:10 1828 XrdCnsSched: 2 threads; 1 idle >>>>> 091006 20:56:10 1828 XrdCnsSched: scheduling underused thread monitor >>>>> in 780 seconds >>>>> >>>>> >>>>> Thanks >>>>> Wen >>>>> >>>> >>>> >> >