[Zope] Re: Zope hangs during load (Panic!)

Dieter Maurer wrote:

Use "gdb" and attach to the main process. Use "info threads", "thread <threadno>" and "backtrace" to learn about the various threads, select a thread and show where it is lingering.

OK, I first made the server freeze with the benchmark program. I then ran gdb with the following command: gdb python [PID-nr] info threads: ------------- (gdb) info threads 8 Process 9870, Thread 8 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 7 Process 9870, Thread 7 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 6 Process 9870, Thread 6 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 5 Process 9870, Thread 5 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 4 Process 9870, Thread 4 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 3 Process 9870, Thread 3 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 2 Process 9870, Thread 2 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 * 1 Process 9870, Thread 1 0x2826a2af in poll () from /lib/libc.so.5 (gdb) thread 1 thread 1 & backtrace: --------------------- (gdb) thread 1 [Switching to thread 1 (Process 9870, Thread 1)]#0 0x2826a2af in poll () from /lib/libc.so.5 (gdb) backtrace #0 0x2826a2af in poll () from /lib/libc.so.5 #1 0x2812da51 in _thread_kern_sched_state_unlock () from /usr/lib/libc_r.so.5 #2 0x2812d445 in _thread_kern_scheduler () from /usr/lib/libc_r.so.5 thread 2 & backtrace: --------------------- (gdb) thread 2 [Switching to thread 2 (Process 9870, Thread 2)]#0 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 (gdb) backtrace #0 0x2812ce96 in _thread_kern_sched () from /usr/lib/libc_r.so.5 #1 0x2812d608 in _thread_kern_sched_state () from /usr/lib/libc_r.so.5 #2 0x2812a216 in _read () from /usr/lib/libc_r.so.5 #3 0x282d5d01 in __sread () from /lib/libc.so.5 #4 0x282d5de6 in _sread () from /lib/libc.so.5 #5 0x282c2c48 in __srefill () from /lib/libc.so.5 #6 0x282bd65a in fread () from /lib/libc.so.5 #7 0x08062745 in Py_UniversalNewlineFread () #8 0x0806081a in PyFile_SetEncoding () #9 0x080d9d72 in PyCFunction_Call () #10 0x080a1345 in PyEval_GetFuncDesc () #11 0x0809f31f in PyEval_EvalCode () #12 0x080a150f in PyEval_GetFuncDesc () #13 0x080a13dc in PyEval_GetFuncDesc () #14 0x0809f31f in PyEval_EvalCode () #15 0x080a150f in PyEval_GetFuncDesc () #16 0x080a13dc in PyEval_GetFuncDesc () #17 0x0809f31f in PyEval_EvalCode () #18 0x080a028f in PyEval_EvalCodeEx () #19 0x080d9688 in PyFunction_SetClosure () #20 0x08059ca9 in PyObject_Call () #21 0x080a1a95 in PyEval_GetFuncDesc () #22 0x0809f3dc in PyEval_EvalCode () #23 0x080a028f in PyEval_EvalCodeEx () #24 0x080d9688 in PyFunction_SetClosure () #25 0x08059ca9 in PyObject_Call () #26 0x080a10f5 in PyEval_CallObjectWithKeywords () #27 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #28 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #29 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #30 0x08059ca9 in PyObject_Call () #31 0x080a10f5 in PyEval_CallObjectWithKeywords () #32 0x284ea89d in CallMethodO () from /opt/Zope-2.7/lib/python/Acquisition.so #33 0x284ebdc9 in Wrapper_call () from /opt/Zope-2.7/lib/python/Acquisition.so #34 0x08059ca9 in PyObject_Call () #35 0x080a187d in PyEval_GetFuncDesc () #36 0x080a13fa in PyEval_GetFuncDesc () #37 0x0809f31f in PyEval_EvalCode () #38 0x080a028f in PyEval_EvalCodeEx () #39 0x080d9688 in PyFunction_SetClosure () #40 0x08059ca9 in PyObject_Call () #41 0x080a1a95 in PyEval_GetFuncDesc () #42 0x0809f3dc in PyEval_EvalCode () #43 0x080a028f in PyEval_EvalCodeEx () ---Type <return> to continue, or q <return> to quit--- #44 0x080d9688 in PyFunction_SetClosure () #45 0x08059ca9 in PyObject_Call () #46 0x080a10f5 in PyEval_CallObjectWithKeywords () #47 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #48 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #49 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #50 0x08059ca9 in PyObject_Call () #51 0x080a187d in PyEval_GetFuncDesc () #52 0x080a13fa in PyEval_GetFuncDesc () #53 0x0809f31f in PyEval_EvalCode () #54 0x080a028f in PyEval_EvalCodeEx () #55 0x080d9688 in PyFunction_SetClosure () #56 0x08059ca9 in PyObject_Call () #57 0x080a10f5 in PyEval_CallObjectWithKeywords () #58 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #59 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #60 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #61 0x08059ca9 in PyObject_Call () #62 0x080a187d in PyEval_GetFuncDesc () #63 0x080a13fa in PyEval_GetFuncDesc () #64 0x0809f31f in PyEval_EvalCode () #65 0x080a028f in PyEval_EvalCodeEx () #66 0x080d9688 in PyFunction_SetClosure () #67 0x08059ca9 in PyObject_Call () #68 0x080a10f5 in PyEval_CallObjectWithKeywords () #69 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #70 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #71 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #72 0x08059ca9 in PyObject_Call () #73 0x080a187d in PyEval_GetFuncDesc () #74 0x080a13fa in PyEval_GetFuncDesc () #75 0x0809f31f in PyEval_EvalCode () #76 0x080a028f in PyEval_EvalCodeEx () #77 0x080a15a0 in PyEval_GetFuncDesc () #78 0x080a13dc in PyEval_GetFuncDesc () #79 0x0809f31f in PyEval_EvalCode () #80 0x080a150f in PyEval_GetFuncDesc () #81 0x080a13dc in PyEval_GetFuncDesc () #82 0x0809f31f in PyEval_EvalCode () #83 0x080a028f in PyEval_EvalCodeEx () #84 0x080a15a0 in PyEval_GetFuncDesc () #85 0x080a13dc in PyEval_GetFuncDesc () ---Type <return> to continue, or q <return> to quit--- #86 0x0809f31f in PyEval_EvalCode () #87 0x080a028f in PyEval_EvalCodeEx () #88 0x080d9688 in PyFunction_SetClosure () #89 0x08059ca9 in PyObject_Call () #90 0x0805f75b in PyMethod_New () #91 0x08059ca9 in PyObject_Call () #92 0x0805edc6 in _PyInstance_Lookup () #93 0x08059ca9 in PyObject_Call () #94 0x080a187d in PyEval_GetFuncDesc () #95 0x080a13fa in PyEval_GetFuncDesc () #96 0x0809f31f in PyEval_EvalCode () #97 0x080a028f in PyEval_EvalCodeEx () #98 0x080a15a0 in PyEval_GetFuncDesc () #99 0x080a13dc in PyEval_GetFuncDesc () #100 0x0809f31f in PyEval_EvalCode () #101 0x080a150f in PyEval_GetFuncDesc () #102 0x080a13dc in PyEval_GetFuncDesc () #103 0x0809f31f in PyEval_EvalCode () #104 0x080a150f in PyEval_GetFuncDesc () #105 0x080a13dc in PyEval_GetFuncDesc () #106 0x0809f31f in PyEval_EvalCode () #107 0x080a150f in PyEval_GetFuncDesc () #108 0x080a13dc in PyEval_GetFuncDesc () #109 0x0809f31f in PyEval_EvalCode () #110 0x080a150f in PyEval_GetFuncDesc () #111 0x080a13dc in PyEval_GetFuncDesc () #112 0x0809f31f in PyEval_EvalCode () #113 0x080a150f in PyEval_GetFuncDesc () #114 0x080a13dc in PyEval_GetFuncDesc () #115 0x0809f31f in PyEval_EvalCode () #116 0x080a150f in PyEval_GetFuncDesc () #117 0x080a13dc in PyEval_GetFuncDesc () #118 0x0809f31f in PyEval_EvalCode () #119 0x080a028f in PyEval_EvalCodeEx () #120 0x080a15a0 in PyEval_GetFuncDesc () #121 0x080a13dc in PyEval_GetFuncDesc () #122 0x0809f31f in PyEval_EvalCode () #123 0x080a150f in PyEval_GetFuncDesc () #124 0x080a13dc in PyEval_GetFuncDesc () #125 0x0809f31f in PyEval_EvalCode () #126 0x080a150f in PyEval_GetFuncDesc () #127 0x080a13dc in PyEval_GetFuncDesc () #128 0x0809f31f in PyEval_EvalCode () #129 0x080a150f in PyEval_GetFuncDesc () #130 0x080a13dc in PyEval_GetFuncDesc () ---Type <return> to continue, or q <return> to quit--- #131 0x0809f31f in PyEval_EvalCode () #132 0x080a150f in PyEval_GetFuncDesc () #133 0x080a13dc in PyEval_GetFuncDesc () #134 0x0809f31f in PyEval_EvalCode () #135 0x080a028f in PyEval_EvalCodeEx () #136 0x080d9688 in PyFunction_SetClosure () #137 0x08059ca9 in PyObject_Call () #138 0x0805f75b in PyMethod_New () #139 0x08059ca9 in PyObject_Call () #140 0x0805edc6 in _PyInstance_Lookup () #141 0x08059ca9 in PyObject_Call () #142 0x080a187d in PyEval_GetFuncDesc () #143 0x080a13fa in PyEval_GetFuncDesc () #144 0x0809f31f in PyEval_EvalCode () #145 0x080a028f in PyEval_EvalCodeEx () #146 0x080d9688 in PyFunction_SetClosure () #147 0x08059ca9 in PyObject_Call () #148 0x080a10f5 in PyEval_CallObjectWithKeywords () #149 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #150 0x284a2780 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #151 0x08059ca9 in PyObject_Call () #152 0x080a187d in PyEval_GetFuncDesc () #153 0x080a13fa in PyEval_GetFuncDesc () #154 0x0809f31f in PyEval_EvalCode () #155 0x080a028f in PyEval_EvalCodeEx () #156 0x080d9688 in PyFunction_SetClosure () #157 0x08059ca9 in PyObject_Call () #158 0x080a10f5 in PyEval_CallObjectWithKeywords () #159 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #160 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #161 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #162 0x08059ca9 in PyObject_Call () #163 0x080a187d in PyEval_GetFuncDesc () #164 0x080a13fa in PyEval_GetFuncDesc () #165 0x0809f31f in PyEval_EvalCode () #166 0x080a028f in PyEval_EvalCodeEx () #167 0x080d9688 in PyFunction_SetClosure () #168 0x08059ca9 in PyObject_Call () #169 0x080a10f5 in PyEval_CallObjectWithKeywords () #170 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #171 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #172 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so ---Type <return> to continue, or q <return> to quit--- #173 0x08059ca9 in PyObject_Call () #174 0x080a187d in PyEval_GetFuncDesc () #175 0x080a13fa in PyEval_GetFuncDesc () #176 0x0809f31f in PyEval_EvalCode () #177 0x080a028f in PyEval_EvalCodeEx () #178 0x080d9688 in PyFunction_SetClosure () #179 0x08059ca9 in PyObject_Call () #180 0x080a10f5 in PyEval_CallObjectWithKeywords () #181 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #182 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #183 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #184 0x08059ca9 in PyObject_Call () #185 0x080a187d in PyEval_GetFuncDesc () #186 0x080a13fa in PyEval_GetFuncDesc () #187 0x0809f31f in PyEval_EvalCode () #188 0x080a028f in PyEval_EvalCodeEx () #189 0x080d9688 in PyFunction_SetClosure () #190 0x08059ca9 in PyObject_Call () #191 0x080a10f5 in PyEval_CallObjectWithKeywords () #192 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #193 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #194 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #195 0x08059ca9 in PyObject_Call () #196 0x080a10f5 in PyEval_CallObjectWithKeywords () #197 0x284ea89d in CallMethodO () from /opt/Zope-2.7/lib/python/Acquisition.so #198 0x284ebdc9 in Wrapper_call () from /opt/Zope-2.7/lib/python/Acquisition.so #199 0x08059ca9 in PyObject_Call () #200 0x080a187d in PyEval_GetFuncDesc () #201 0x080a13fa in PyEval_GetFuncDesc () #202 0x0809f31f in PyEval_EvalCode () #203 0x080a028f in PyEval_EvalCodeEx () #204 0x080d9688 in PyFunction_SetClosure () #205 0x08059ca9 in PyObject_Call () #206 0x080a10f5 in PyEval_CallObjectWithKeywords () #207 0x284a2473 in callMethodWithPossibleHook () from /opt/Zope-2.7/lib/python/ExtensionClass.so #208 0x284a257d in call_PMethod () from /opt/Zope-2.7/lib/python/ExtensionClass.so #209 0x284a25e0 in PMethod_call () from /opt/Zope-2.7/lib/python/ExtensionClass.so #210 0x08059ca9 in PyObject_Call () #211 0x080a10f5 in PyEval_CallObjectWithKeywords () #212 0x284ea89d in CallMethodO () from /opt/Zope-2.7/lib/python/Acquisition.so #213 0x284ebdc9 in Wrapper_call () from /opt/Zope-2.7/lib/python/Acquisition.so #214 0x08059ca9 in PyObject_Call () ---Type <return> to continue, or q <return> to quit--- #215 0x080a10f5 in PyEval_CallObjectWithKeywords () #216 0x080960e9 in _PyUnicodeUCS4_IsAlpha () #217 0x080d9d72 in PyCFunction_Call () #218 0x080a1345 in PyEval_GetFuncDesc () #219 0x0809f31f in PyEval_EvalCode () #220 0x080a150f in PyEval_GetFuncDesc () #221 0x080a13dc in PyEval_GetFuncDesc () #222 0x0809f31f in PyEval_EvalCode () #223 0x080a028f in PyEval_EvalCodeEx () #224 0x080a15a0 in PyEval_GetFuncDesc () #225 0x080a13dc in PyEval_GetFuncDesc () #226 0x0809f31f in PyEval_EvalCode () #227 0x080a028f in PyEval_EvalCodeEx () #228 0x080a15a0 in PyEval_GetFuncDesc () #229 0x080a13dc in PyEval_GetFuncDesc () #230 0x0809f31f in PyEval_EvalCode () #231 0x080a028f in PyEval_EvalCodeEx () #232 0x080a15a0 in PyEval_GetFuncDesc () #233 0x080a13dc in PyEval_GetFuncDesc () #234 0x0809f31f in PyEval_EvalCode () #235 0x080a028f in PyEval_EvalCodeEx () #236 0x080a15a0 in PyEval_GetFuncDesc () #237 0x080a13dc in PyEval_GetFuncDesc () #238 0x0809f31f in PyEval_EvalCode () #239 0x080a028f in PyEval_EvalCodeEx () #240 0x080a15a0 in PyEval_GetFuncDesc () #241 0x080a13dc in PyEval_GetFuncDesc () #242 0x0809f31f in PyEval_EvalCode () #243 0x080a028f in PyEval_EvalCodeEx () #244 0x080d9688 in PyFunction_SetClosure () #245 0x08059ca9 in PyObject_Call () #246 0x0805f75b in PyMethod_New () #247 0x08059ca9 in PyObject_Call () #248 0x080a10f5 in PyEval_CallObjectWithKeywords () #249 0x0805b9fa in PyInstance_New () #250 0x08059ca9 in PyObject_Call () #251 0x080a10f5 in PyEval_CallObjectWithKeywords () #252 0x080c1b1b in _PyObject_GC_Del () #253 0x2812450e in _thread_start () from /usr/lib/libc_r.so.5 -Petter-