I'll take a look and see if I can reproduce it. --Michi
On 2/1/11 1:24 PM, "Patrick Hunt" <[email protected]> wrote: > Great. I marked it as critical given the client hangs. If someone has > a chance to look at what this might be (mahadev or michi?) it would be > great to get a fix in. > > Patrick > > On Tue, Feb 1, 2011 at 12:23 PM, Jeremy Stribling <[email protected]> wrote: >> Ok, done: >> >> https://issues.apache.org/jira/browse/ZOOKEEPER-981 >> >> On 02/01/2011 10:00 AM, Patrick Hunt wrote: >>> >>> Hi Jeremy. Nothing comes to mind. I searched around on jira a bit and >>> nothing there pops out at me either. >>> >>> I'd encourage you to create a jira regardless, add the details you >>> have available currently and if you are able to reproduce attach >>> additional information. >>> >>> Regards, >>> >>> Patrick >>> >>> On Mon, Jan 31, 2011 at 6:09 PM, Jeremy Stribling<[email protected]> >>> wrote: >>> >>>> >>>> I haven't been able to reproduce it, but if I do I will update again with >>>> more details and make a JIRA. I was hoping someone might just know >>>> something off the top of their head. Thanks! >>>> >>>> On 01/31/2011 05:05 PM, Patrick Hunt wrote: >>>> >>>>> >>>>> Hi Jeremy, that is unusual, is it reproduceable? Do you have details >>>>> on the stack for threads other than this thread doing the close? >>>>> >>>>> It would be best if you could create a JIRA for this, the more detail >>>>> you could provide the better (full stacks and any log files) >>>>> https://issues.apache.org/jira/browse/ZOOKEEPER >>>>> >>>>> Patrick >>>>> >>>>> On Mon, Jan 31, 2011 at 10:26 AM, Jeremy Stribling<[email protected]> >>>>> wrote: >>>>> >>>>> >>>>>> >>>>>> I responded to someone off-list about this, but I just wanted to >>>>>> clarify >>>>>> to >>>>>> everyone that the part of the backtrace that isn't shown is entirely >>>>>> within >>>>>> my application, and zookeeper_close isn't being called from any >>>>>> Zookeeper >>>>>> completion thread. >>>>>> >>>>>> On 01/29/2011 11:23 AM, Jeremy Stribling wrote: >>>>>> >>>>>> >>>>>>> >>>>>>> Hi everyone, >>>>>>> >>>>>>> I use the multithreaded ZK C client library (3.3.2), and I'm seeing my >>>>>>> application hang, and the only thread in it that's doing anything >>>>>>> interesting is this one: >>>>>>> >>>>>>> Thread 8 (Thread 5644): >>>>>>> #0 0x00007f5d7bb5bbe4 in __lll_lock_wait () from /lib/libpthread.so.0 >>>>>>> #1 0x00007f5d7bb59ad0 in pthread_cond_broadcast@@GLIBC_2.3.2 () from >>>>>>> /lib/libpthread.so.0 >>>>>>> #2 0x00007f5d793628f6 in unlock_completion_list (l=0x32b4d68) at >>>>>>> .../zookeeper/src/c/src/mt_adaptor.c:66 >>>>>>> #3 0x00007f5d79354d4b in free_completions (zh=0x32b4c80, >>>>>>> callCompletion=1, reason=-116) at >>>>>>> .../zookeeper/src/c/src/zookeeper.c:1069 >>>>>>> #4 0x00007f5d79355008 in cleanup_bufs (zh=0x32b4c80, >>>>>>> callCompletion=1, >>>>>>> rc=-116) at .../thirdparty/zookeeper/src/c/src/zookeeper.c:1125 >>>>>>> #5 0x00007f5d79353200 in destroy (zh=0x32b4c80) at >>>>>>> .../thirdparty/zookeeper/src/c/src/zookeeper.c:366 >>>>>>> #6 0x00007f5d79358e0e in zookeeper_close (zh=0x32b4c80) at >>>>>>> .../zookeeper/src/c/src/zookeeper.c:2326 >>>>>>> #7 0x00007f5d79356d18 in api_epilog (zh=0x32b4c80, rc=0) at >>>>>>> .../zookeeper/src/c/src/zookeeper.c:1661 >>>>>>> #8 0x00007f5d79362f2f in adaptor_finish (zh=0x32b4c80) at >>>>>>> .../zookeeper/src/c/src/mt_adaptor.c:205 >>>>>>> #9 0x00007f5d79358c8c in zookeeper_close (zh=0x32b4c80) at >>>>>>> .../zookeeper/src/c/src/zookeeper.c:2297 >>>>>>> .... >>>>>>> >>>>>>> I've seen some threads online about how there's a race condition >>>>>>> associated with zookeeper_close, where if you app is making a >>>>>>> synchronous >>>>>>> call at the same time using the closed zk_handle, there could be a >>>>>>> hang. >>>>>>> However, my app makes no synchronous calls, and I'm 99% sure that no >>>>>>> other >>>>>>> thread in my app is making any concurrent call into the library >>>>>>> ('thread >>>>>>> apply all bt' in gdb doesn't show any other usage of the library, >>>>>>> anyway). >>>>>>> >>>>>>> Has anyone seen this before? Any leads? Thanks, >>>>>>> >>>>>>> Jeremy >>>>>>> >>>>>>> >>>>>> >>>>>> >>>> >>>> >> >
