uwsgi crash

Today 8:59

!!! uWSGI process 21913 got Segmentation Fault !!!
*** backtrace of 21913 ***
/usr/local/bin/uwsgi(uwsgi_backtrace+0x29) [0x45d649]
/usr/local/bin/uwsgi(uwsgi_segfault+0x21) [0x45d7c1]
/lib64/libc.so.6 [0x3a5a4302d0]
/usr/local/bin/uwsgi(uwsgi_cache_set2+0x146) [0x452006]
*** end of backtrace ***
[deadlock-detector] pid 21913 was holding lock cache_volume (0x2b5f37e89000)
DAMN ! worker 8 (pid: 21913) died :( trying respawn ...
Respawned uWSGI worker 8 (new pid: 21108)

[pid: 21912|app: 0|req: 12931/60742] 127.0.0.1 () {48 vars in 1242 bytes} [Wed Sep 25 09:02:39 2013] GET /u/agent_volumes?v=0.2671766800340265 => generated 561 bytes in 60 msecs (HTTP/1.1 200) 3 headers in 148 bytes (1 switches on core 0)
!!! uWSGI process 21910 got Segmentation Fault !!!
*** backtrace of 21910 ***
/usr/local/bin/uwsgi(uwsgi_backtrace+0x29) [0x45d649]
/usr/local/bin/uwsgi(uwsgi_segfault+0x21) [0x45d7c1]
/lib64/libc.so.6 [0x3a5a4302d0]
/usr/local/bin/uwsgi(uwsgi_cache_set2+0x146) [0x452006]
/usr/local/bin/uwsgi(uwsgi_cache_magic_set+0xec) [0x45261c]
/usr/local/bin/uwsgi(py_uwsgi_cache_update+0xa3) [0x4713a3]
/usr/local/bin/uwsgi(PyEval_EvalFrameEx+0x5ec4) [0x50d024]
/usr/local/bin/uwsgi(PyEval_EvalCodeEx+0x89b) [0x50ee6b]

*** end of backtrace ***
[pid: 21909|app: 0|req: 7946/60743] 127.0.0.1 () {48 vars in 1248 bytes} [Wed Sep 25 09:02:39 2013] GET /u/assigned_tasks?v=0.34152204007841647 => generated 243 bytes in 265 msecs (HTTP/1.1 200) 3 headers in 148 bytes (1 switches on core 0)
[deadlock-detector] pid 21910 was holding lock cache_volume (0x2b5f37e89000)
DAMN ! worker 5 (pid: 21910) died :( trying respawn ...
Respawned uWSGI worker 5 (new pid: 21716)