uWsgi的回复丢失了答案

【问题标题】：response from uWsgi lostuWsgi的回复丢失了
【发布时间】：2014-12-10 14:39:34
【问题描述】：

我有一个通过 Nginx 和 uWsgi 和远程 Mysql DB 托管的 django 应用程序。在某个非常简单的请求中：我在 uwsgi.log 中随机得到 502 并出现以下错误有时它有效，有时无效......我找不到任何理由证明什么时候无效......有人可以帮助我了解发生了什么以及如何解决它吗？

*** HARAKIRI ON WORKER 1 (pid: 26789, try: 1) ***
HARAKIRI: -- wchan> 0
*** backtrace of 26789 ***
uwsgi(uwsgi_backtrace+0x29) [0x451c09]
uwsgi(what_i_am_doing+0x19) [0x452069]
/lib64/libc.so.6 [0x399da302d0]
/lib64/libpthread.so.0(read+0x4b) [0x399e20daab]
/usr/lib64/mysql/libmysqlclient_r.so.15(vio_read+0x38) [0x2b03e853ab98]
/usr/lib64/mysql/libmysqlclient_r.so.15(vio_read_buff+0x43) [0x2b03e853abf3]
/usr/lib64/mysql/libmysqlclient_r.so.15 [0x2b03e853bdf8]
/usr/lib64/mysql/libmysqlclient_r.so.15(my_net_read+0x199) [0x2b03e853c1f9]
/usr/lib64/mysql/libmysqlclient_r.so.15(cli_safe_read+0x6f) [0x2b03e8535d5f]
/usr/lib64/mysql/libmysqlclient_r.so.15 [0x2b03e8536bc9]
/usr/lib64/mysql/libmysqlclient_r.so.15(mysql_real_query+0x1e) [0x2b03e853553e]
/array/purato/python/lib/python2.6/site-packages/MySQL_python-1.2.3-py2.6-linux-x86_64.egg/_mysql.so [0x2b03e82d27e9]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x6185) [0x2b03e18e36b5]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x679a) [0x2b03e18e3cca]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x679a) [0x2b03e18e3cca]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x56b3) [0x2b03e18e2be3]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x56b3) [0x2b03e18e2be3]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x56b3) [0x2b03e18e2be3]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x56b3) [0x2b03e18e2be3]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x679a) [0x2b03e18e3cca]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x56b3) [0x2b03e18e2be3]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x56b3) [0x2b03e18e2be3]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x679a) [0x2b03e18e3cca]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0 [0x2b03e187359c]
/array/purato/python/lib/libpython2.6.so.1.0(PyObject_Call+0x68) [0x2b03e1848548]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0xddd) [0x2b03e18de30d]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0 [0x2b03e187359c]
/array/purato/python/lib/libpython2.6.so.1.0(PyObject_Call+0x68) [0x2b03e1848548]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0xddd) [0x2b03e18de30d]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x679a) [0x2b03e18e3cca]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0 [0x2b03e187349d]
/array/purato/python/lib/libpython2.6.so.1.0(PyObject_Call+0x68) [0x2b03e1848548]
/array/purato/python/lib/libpython2.6.so.1.0 [0x2b03e1857f9f]
/array/purato/python/lib/libpython2.6.so.1.0(PyObject_Call+0x68) [0x2b03e1848548]
/array/purato/python/lib/libpython2.6.so.1.0 [0x2b03e18a2f4a]
/array/purato/python/lib/libpython2.6.so.1.0(PyObject_Call+0x68) [0x2b03e1848548]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalFrameEx+0x1127) [0x2b03e18de657]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_EvalCodeEx+0x8cf) [0x2b03e18e4c7f]
/array/purato/python/lib/libpython2.6.so.1.0 [0x2b03e187349d]
/array/purato/python/lib/libpython2.6.so.1.0(PyObject_Call+0x68) [0x2b03e1848548]
/array/purato/python/lib/libpython2.6.so.1.0(PyEval_CallObjectWithKeywords+0x56) [0x2b03e18dc906]
uwsgi(python_call+0x20) [0x45f240]
uwsgi(uwsgi_request_wsgi+0x11c) [0x4619ec]
uwsgi(wsgi_req_recv+0x8f) [0x41ef7f]
uwsgi(simple_loop_run+0xc5) [0x44d3c5]
uwsgi(uwsgi_ignition+0x132) [0x44ffc2]
uwsgi(uwsgi_worker_run+0x252) [0x450262]
uwsgi(uwsgi_start+0x13ad) [0x45169d]
uwsgi(main+0x1be6) [0x454f36]
/lib64/libc.so.6(__libc_start_main+0xf4) [0x399da1d9c4]
uwsgi [0x419fe9]
*** end of backtrace ***
HARAKIRI: --- uWSGI worker 1 (pid: 26789) WAS managing request /brizer/ since Tue Oct 13 12:01:51 2014 ---
*** HARAKIRI ON WORKER 1 (pid: 26789, try: 2) ***
DAMN ! worker 1 (pid: 26789) died, killed by signal 9 :( trying respawn ...
Respawned uWSGI worker 1 (new pid: 27845)

有人知道吗？

【问题讨论】：

标签： mysql django nginx uwsgi

【解决方案1】：

你是在 uwsgi 中启用 Harakiri。尝试不使用 Harakiri。

【讨论】：

Harakiri 是 uwsgi 的一部分。我的感觉是我的工作线程卡在某个地方，因为这个错误即将到来。我不确定在哪里。
我认为这可能是 Harakiri 或 uwsgi 配置文件的问题。你的配置文件是什么？
processes = 4 log-x-forwarded-for master Vacuum = true chmod-socket = 666 max-requests = 5000 post-buffering = 4096 listen = 4000 harakiri = 10 harakiri-verbose = true buffer-大小 = 10000

【解决方案2】：

您有一个 mysql 查询需要超过 10 秒才能生成响应。 10 秒后，触发 harakiri 破坏您的进程。您显然可以增加或删除 harakiri，但这只会缓解严重的性能问题。您应该修复 /v2/cost/ 生成的查询。如果您难以识别它，请启用 mysql slow_query 日志

【讨论】：