任务跑一段时间后 scheduler挂掉，错误信息如下

Question

Error in `/usr/bin/python2': double free or corruption (fasttop): 0x00007fbcdc027c30
======= Backtrace: =========
/usr/lib64/libc.so.6(+0x7c619)[0x7fbcf5e08619]
/usr/lib64/libpython2.7.so.1.0(+0x74f95)[0x7fbcf6ae8f95]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x76dc)[0x7fbcf6b5949c]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7fbcf6b583fc]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7fbcf6b583fc]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7fbcf6b583fc]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x70858)[0x7fbcf6ae4858]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(+0x5a995)[0x7fbcf6ace995]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(+0xa2947)[0x7fbcf6b16947]
/usr/lib64/libpython2.7.so.1.0(+0xa165f)[0x7fbcf6b1565f]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x2336)[0x7fbcf6b540f6]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x67bd)[0x7fbcf6b5857d]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x663c)[0x7fbcf6b583fc]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x17fd)[0x7fbcf6b535bd]
/usr/lib64/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x7ed)[0x7fbcf6b5aefd]
/usr/lib64/libpython2.7.so.1.0(+0x7094d)[0x7fbcf6ae494d]
/usr/lib64/libpython2.7.so.1.0(PyObject_Call+0x43)[0x7fbcf6abf9a3]
======= Memory map: ========
00400000-00401000 r-xp 00000000 fd:01 1051894 /usr/bin/python2.7
00600000-00601000 r--p 00000000 fd:01 1051894 /usr/bin/python2.7
00601000-00602000 rw-p 00001000 fd:01 1051894 /usr/bin/python2.7
021c7000-02d09000 rw-p 00000000 00:00 0 [heap]
02d09000-0381a000 rw-p 00000000 00:00 0 [heap]
7fbcc4000000-7fbcc4021000 rw-p 00000000 00:00 0
7fbcc4021000-7fbcc8000000 ---p 00000000 00:00 0
7fbccc000000-7fbccc2bd000 rw-p 00000000 00:00 0
7fbccc2bd000-7fbcd0000000 ---p 00000000 00:00 0
7fbcd0000000-7fbcd0031000 rw-p 00000000 00:00 0
7fbcd0031000-7fbcd4000000 ---p 00000000 00:00 0
7fbcd73cd000-7fbcd73d2000 r-xp 00000000 fd:01 2009 /usr/lib64/python2.7/lib-dynload/_csv.so
7fbcd73d2000-7fbcd75d2000 ---p 00005000 fd:01 2009 /usr/lib64/python2.7/lib-dynload/_csv.so
7fbcd75d2000-7fbcd75d3000 r--p 00005000 fd:01 2009 /usr/lib64/python2.7/lib-dynload/_csv.so
7fbcd75d3000-7fbcd75d5000 rw-p 00006000 fd:01 2009 /usr/lib64/python2.7/lib-dynload/_csv.so
7fbcd75d5000-7fbcd75fc000 r-xp 00000000 fd:01 1050812 /usr/lib64/libexpat.so.1.6.0
7fbcd75fc000-7fbcd77fc000 ---p 00027000 fd:01 1050812 /usr/lib64/libexpat.so.1.6.0
7fbcd77fc000-7fbcd77fe000 r--p 00027000 fd:01 1050812 /usr/lib64/libexpat.so.1.6.0
7fbcd77fe000-7fbcd77ff000 rw-p 00029000 fd:01 1050812 /usr/lib64/libexpat.so.1.6.0
7fbcd77ff000-7fbcd7800000 ---p 00000000 00:00 0
7fbcd7800000-7fbcd8000000 rw-p 00000000 00:00 0 [stack:7616]
7fbcd8000000-7fbcd802a000 rw-p 00000000 00:00 0
7fbcd802a000-7fbcdc000000 ---p 00000000 00:00 0
7fbcdc000000-7fbcdc05b000 rw-p 00000000 00:00 0
7fbcdc05b000-7fbce0000000 ---p 00000000 00:00 0
7fbce0000000-7fbce00bb000 rw-p 00000000 00:00 0
7fbce00bb000-7fbce4000000 ---p 00000000 00:00 0
7fbce41f5000-7fbce4200000 r-xp 00000000 fd:01 2052 /usr/lib64/python2.7/lib-dynload/pyexpat.so
7fbce4200000-7fbce43ff000 ---p 0000b000 fd:01 2052 /usr/lib64/python2.7/lib-dynload/pyexpat.so
7fbce43ff000-7fbce4400000 r--p 0000a000 fd:01 2052 /usr/lib64/python2.7/lib-dynload/pyexpat.so
7fbce4400000-7fbce4402000 rw-p 0000b000 fd:01 2052 /usr/lib64/python2.7/lib-dynload/pyexpat.so
7fbce4402000-7fbce4403000 ---p 00000000 00:00 0
7fbce4403000-7fbce4c03000 rw-p 00000000 00:00 0 [stack:7615]
7fbce4c03000-7fbce4c04000 ---p 00000000 00:00 0
7fbce4c04000-7fbce5404000 rw-p 00000000 00:00 0 [stack:7614]
7fbce5404000-7fbce5405000 ---p 00000000 00:00 0
7fbce5405000-7fbce5c05000 rw-p 00000000 00:00 0 [stack:7613]### 问题描述

问题出现的平台版本及自己尝试过哪些方法

相关代码

// 请把代码文本粘贴到下方（请勿用图片代替代码）

你期待的结果是什么？实际看到的错误信息又是什么？