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Posted to dev@zookeeper.apache.org by "Henry Robinson (JIRA)" <ji...@apache.org> on 2010/02/22 05:08:27 UTC
[jira] Commented: (ZOOKEEPER-676) 50%-75% connection loss
exceptions using zkpython
[ https://issues.apache.org/jira/browse/ZOOKEEPER-676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12836506#action_12836506 ]
Henry Robinson commented on ZOOKEEPER-676:
------------------------------------------
Thanks for the report!
Can you let me know what version of zkpython you're using - is it from ZK trunk or an official release? There is another JIRA related to segfaults on watchers, I wonder if this is related...
Henry
> 50%-75% connection loss exceptions using zkpython
> -------------------------------------------------
>
> Key: ZOOKEEPER-676
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-676
> Project: Zookeeper
> Issue Type: Bug
> Components: contrib, contrib-bindings
> Affects Versions: 3.2.2
> Environment: Mac OS X 10.5.8, MacBook Air Intel Core 2 Duo @ 1.86GHz, Python 2.5.1, ZooKeeper 3.2.2 Standalone
> Reporter: Josh Fraser
>
> 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
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