Description

In the last three days here in MoinMoinWiki were temporary (respectively for some hours) different error messages. It had always something to do with "Too many files are open". As a result, in JuraWiki ¹ are some pages in RecentChanges marked as "deleted", although the revision history of these pages does not confirm this. Tryhing to revert the last version delivers the message: "Seite konnte nicht gesperrt werden. Fehlende Datei 'current'" (English: "page could not be locked missing file current").

Steps to reproduce

1. Wait for this evening, perhaps the same phenomenon will occur.

Details

This Wiki, LinuxWiki and JuraWiki (running Twisted).

Workaround

• Wait for some hours.
• The admin restarts the server every few hours (really).

In JuraWiki we put the content of the pages that were deleted on new page2 and made a list of the pages that are concerned, see WasZuReparierenIst2.

Discussion

Twisted seems to close sockets just slowly. We do not know why.

Debugging helper:

•    1 import socket, traceback, sys
     2 
     3 _realrealsocket = socket._realsocket
     4 _realclosedsocket = socket._closedsocket
     5 
     6 _stream = sys.stderr
     7 #_stream = open('socket.log')
     8 
     9 def _socket(family, type, proto):
    10     _sock = _realrealsocket(family, type, proto)
    11     stack = traceback.format_stack()
    12     print >>_stream, "OPEN:", repr(_sock), stack
    13     return _sock
    14 
    15 def _close():
    16     stack = traceback.format_stack()
    17     print >>_stream, "CLOSE:", stack
    18     return _realclosedsocket()
    19 
    20 socket._realsocket = _socket
    21 socket._closedsocket = _close
    22     
  

  sockdebug.py

This is just a strat, and creates TONS of logging. Import it at some central place, before the server's mainloop.

• The socket timeout of twisted defaulted to 12 hours. Changed to 10 minutes (still long enough) for MoinMoin usage.

Plan

• Priority: medium

• Assigned to: ThomasWaldmann

• Status: fixed

CategoryMoinMoinBugFixed