hang in jemalloc()

[Alexey Kuts]

Hi,

sometimes (maybe once per day) we have
an annoying hang in jemalloc().

jemalloc-version: 3.4.1-0-g0135fb806e4137dc9cdf152541926a2bc95e33f0
Ubuntu 12.04.3 LTS, 3.2.0-33-generic x86_64 GNU/Linux


#0  0x00007f6bd681a89c in __lll_lock_wait () from 
/lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f6bd6816080 in _L_lock_903 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007f6bd6815f19 in pthread_mutex_lock () from 
/lib/x86_64-linux-gnu/libpthread.so.0
#3  0x0000000000459127 in malloc_mutex_lock (mutex=0x7f6bd4400a08) at 
include/jemalloc/internal/mutex.h:77
#4  tcache_bin_flush_small (tbin=<optimized out>, binind=15, rem=3, 
tcache=0x7f6bd4006000) at src/tcache.c:105
#5  0x000000000045958d in tcache_event_hard (tcache=0x7f6bd4006000) at 
src/tcache.c:39
#6  0x0000000000437ebe in tcache_event (tcache=0x7f6bd4006000) at 
include/jemalloc/internal/tcache.h:271
#7  tcache_alloc_large (size=<optimized out>, tcache=<optimized out>, 
zero=<optimized out>) at include/jemalloc/internal/tcache.h:383
#8  arena_malloc (zero=false, size=<optimized out>, arena=0x0, 
try_tcache=true) at include/jemalloc/internal/arena.h:944
#9  imallocx (arena=0x0, try_tcache=true, size=<optimized out>) at 
include/jemalloc/internal/jemalloc_internal.h:798
#10 imalloc (size=<optimized out>) at 
include/jemalloc/internal/jemalloc_internal.h:807
#11 jemalloc (size=<optimized out>) at src/jemalloc.c:887
#12 0x00007f6bd6d3bad8 in xmlStrndup () from 
/usr/lib/x86_64-linux-gnu/libxml2.so.2
#13 0x00007f6bd6ce3029 in xmlNodeListGetString () from 
/usr/lib/x86_64-linux-gnu/libxml2.so.2
#14 0x00007f6bd6d0038f in xmlValidateElement () from 
/usr/lib/x86_64-linux-gnu/libxml2.so.2
#15 0x00007f6bd6d0034e in xmlValidateElement () from 
/usr/lib/x86_64-linux-gnu/libxml2.so.2
#16 0x00007f6bd6d0034e in xmlValidateElement () from 
/usr/lib/x86_64-linux-gnu/libxml2.so.2
#17 0x00007f6bd6d00528 in xmlValidateDtd () from 
/usr/lib/x86_64-linux-gnu/libxml2.so.2
#18 0x00007f6bd7005355 in xmlpp::DtdValidator::validate(xmlpp::Document 
const*) () from /usr/lib/libxml++-2.6.so.2

Will appreciate any hints or suggestions

-- 
Kuts Alexey