50%-75% connection loss exceptions using zkpython

I get about 50-75% connection loss exceptions and about 10% Bus Error when using the contrib/zkpython zookeeper.so. Below is the exception:

2010-02-21 16:57:56,138:18481(0xb0081000):ZOO_ERROR@handle_socket_error_msg@1359: Socket [fe80::1002:885:7f00:1:2181] zk retcode=-4, errno=47(Address family not supported by protocol family): connect() call failed
Traceback (most recent call last):
File "./zksh.py", line 63, in <module>
2010-02-21 16:57:56,138:18481(0xb0081000):ZOO_INFO@check_events@1439: initiated connection to server [127.0.0.1:2181]
zkcli.dispatch(cmd,*args)
File "./zksh.py", line 56, in dispatch
returned = run(*args)
File "./zksh.py", line 48, in ls
print "\n".join(self.cmd.listNode(node))
File "/Users/josh/git/zktools/commands.py", line 22, in listNode
for path in zookeeper.get_children(self.zk, node):
zookeeper.ConnectionLossException: connection loss

I've run this in gdb and have this backtrace:

#0 free_pywatcher (pw=0x0) at src/c/zookeeper.c:199
#1 0x0025ae09 in pyzoo_exists (self=0x0, args=0x0) at src/c/zookeeper.c:765
#2 0x0018f51e in PyEval_EvalFrameEx ()
#3 0x00191173 in PyEval_EvalCodeEx ()
#4 0x0013b488 in PyFunction_SetClosure ()
#5 0x00121505 in PyObject_Call ()
#6 0x0018fcd0 in PyEval_EvalFrameEx ()
#7 0x00191173 in PyEval_EvalCodeEx ()
#8 0x0013b488 in PyFunction_SetClosure ()
#9 0x00121505 in PyObject_Call ()
#10 0x0018fcd0 in PyEval_EvalFrameEx ()
#11 0x00191173 in PyEval_EvalCodeEx ()
#12 0x0018f79d in PyEval_EvalFrameEx ()
#13 0x00191173 in PyEval_EvalCodeEx ()
#14 0x00191260 in PyEval_EvalCode ()
#15 0x001a883c in PyErr_Display ()
#16 0x001aa4ab in PyRun_InteractiveOneFlags ()
#17 0x001aa5f9 in PyRun_InteractiveLoopFlags ()
#18 0x001aaa2b in PyRun_AnyFileExFlags ()
#19 0x001b5a57 in Py_Main ()
#20 0x00001fca in ?? ()

zookeeper.c @ line 199:

void free_pywatcher( pywatcher_t *pw)
{
Py_DECREF(pw->callback);
free(pw);
}

That's as far as I've dug so far – I ended up just writing a retry decorator to get around it for now. On the same machine, the zkCli.sh test client works flawlessly. Also, here's the Mac OS X Bus Error trace:

Process: Python [18556]
Path: /System/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python
Identifier: Python
Version: ??? (???)
Code Type: X86 (Native)
Parent Process: bash [18436]

Interval Since Last Report: 3323078 sec
Crashes Since Last Report: 50
Per-App Interval Since Last Report: 0 sec
Per-App Crashes Since Last Report: 38

Date/Time: 2010-02-21 17:07:27.399 -0800
OS Version: Mac OS X 10.5.8 (9L31a)
Report Version: 6
Anonymous UUID: FA533BDA-50B2-47A9-931C-6F2614C741F0

Exception Type: EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000004
Crashed Thread: 0

Thread 0 Crashed:
0 zookeeper.so 0x002332bd free_pywatcher + 10 (zookeeper.c:199)
1 zookeeper.so 0x00239e09 pyzoo_exists + 984 (zookeeper.c:765)
2 org.python.python 0x0018f51e PyEval_EvalFrameEx + 17116
3 org.python.python 0x0018f700 PyEval_EvalFrameEx + 17598
4 org.python.python 0x00191173 PyEval_EvalCodeEx + 1638
5 org.python.python 0x0013b488 PyFunction_SetClosure + 2667
6 org.python.python 0x00121505 PyObject_Call + 50
7 org.python.python 0x0018fcd0 PyEval_EvalFrameEx + 19086
8 org.python.python 0x00191173 PyEval_EvalCodeEx + 1638
9 org.python.python 0x0013b488 PyFunction_SetClosure + 2667
10 org.python.python 0x00121505 PyObject_Call + 50
11 org.python.python 0x0018fcd0 PyEval_EvalFrameEx + 19086
12 org.python.python 0x00191173 PyEval_EvalCodeEx + 1638
13 org.python.python 0x00191260 PyEval_EvalCode + 87
14 org.python.python 0x001a883c PyErr_Display + 1896
15 org.python.python 0x001a8e66 PyRun_FileExFlags + 135
16 org.python.python 0x001aa7d2 PyRun_SimpleFileExFlags + 421
17 org.python.python 0x001b5a57 Py_Main + 3095
18 org.python.pythonapp 0x00001fca 0x1000 + 4042

Thread 1:
0 libSystem.B.dylib 0x9265fe0e poll$UNIX2003 + 10
1 libSystem.B.dylib 0x9262a155 _pthread_start + 321
2 libSystem.B.dylib 0x9262a012 thread_start + 34

Thread 2:
0 libSystem.B.dylib 0x9260046e __semwait_signal + 10
1 libSystem.B.dylib 0x9262adcd pthread_cond_wait$UNIX2003 + 73
2 libzookeeper_mt.2.dylib 0x00247e9f do_completion + 223
3 libSystem.B.dylib 0x9262a155 _pthread_start + 321
4 libSystem.B.dylib 0x9262a012 thread_start + 34

Thread 0 crashed with X86 Thread State (32-bit):
eax: 0x00000000 ebx: 0x00239a3c ecx: 0x00000000 edx: 0x00000000
edi: 0x001efaa0 esi: 0x00000000 ebp: 0xbfffe508 esp: 0xbfffe4f0
ss: 0x0000001f efl: 0x00010286 eip: 0x002332bd cs: 0x00000017
ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
cr2: 0x00000004

Binary Images:
0x1000 - 0x1ffe org.python.pythonapp 2.5.0 (2.5.0a0) <5aa9f0cc36fda395f965e08c96613cf5> /System/Library/Frameworks/Python.framework/Versions/2.5/Resources/Python.app/Contents/MacOS/Python
0x119000 - 0x1e5feb org.python.python 2.5 (2.5) <523ba54c654eeed6bc670db2f58a73ab> /System/Library/Frameworks/Python.framework/Versions/2.5/Python
0x232000 - 0x23ffff +zookeeper.so ??? (???) <77134e53d6dbc7bbcf783b0fc2b16d6e> /Library/Python/2.5/site-packages/zookeeper.so
0x246000 - 0x255fef +libzookeeper_mt.2.dylib ??? (???) <839ce6d5a904236d0f0112e75656ecfd> /usr/local/lib/libzookeeper_mt.2.dylib
0x8fe00000 - 0x8fe2db43 dyld 97.1 (???) <458eed38a009e5658a79579e7bc26603> /usr/lib/dyld
0x925f8000 - 0x9275fff3 libSystem.B.dylib ??? (???) <ae47ca9b1686b065f8ac4d2de09cc432> /usr/lib/libSystem.B.dylib
0x96aea000 - 0x96af1fe9 libgcc_s.1.dylib ??? (???) <e280ddf3f5fb3049e674edcb109f389a> /usr/lib/libgcc_s.1.dylib
0x96fc9000 - 0x96fcdfff libmathCommon.A.dylib ??? (???) /usr/lib/system/libmathCommon.A.dylib
0xffff0000 - 0xffff1780 libSystem.B.dylib ??? (???) /usr/lib/libSystem.B.dylib