Comment 4 for bug 107391

Ming Hua wrote:
> On Mon, May 14, 2007 at 02:23:39AM -0000, David Cournapeau wrote:
>> Sorry for the late reply.　It looks like there are two specific
>> problemes, actually: applications hanging up when scim is the IM, and
>> problems when converting from kana to kanji, specific to scim-anthy.
>>
>> First, I removed all the settings related to IM from my .xsession and my
>> bashrc, to test it on a per application basis. When I do:
>>
>> GTK_IM_MODULE=xim mozilla-thunderbird
>>
>> then it launches correctly. If I replace xim by scim in the above
>> command, it does not work anymore. scim is effectively launched,
>> since I get:
>>
>> Launching a SCIM daemon with Socket FrontEnd...
>> Loading simple Config module ...
>> Creating backend ...
>> Loading socket FrontEnd module ...
>> Starting SCIM as daemon ...
>> GTK Panel of SCIM 1.4.4
>>
>> But it hangs here, apparently doing nothing (no cpu is taken by the
>> process). This is the same whatever application using gtk I launch.
>> Something which may be of some interest is that when I launches an
>> application with GTK_IM_MODULE set to scim under strace, it always hangs
>> at the following call:
>>
>> connect(3, {sa_family=AF_FILE, path="/tmp/scim-socket-frontend-david"},
>
> I am confused here. There is a known bug about GTK_IM_MODULE=scim not
> working, related to old C++ library libstdc++5, reported as bug #2246.
> But this doesn't seem to be the case here.
This does not seem related at all. First, scim is linked to libstdc++6,
and this problem appears for any gtk applications, even the ones which
do not use c++ (for example gedit does not seem to be linked to
libstdc++ according to ldd).
>
> Maybe, but I have too little experience on NFS to have any informed
> opinion. But as we are talking about this, your /tmp is on a local
> disk, isn't it?
Yes, only $HOME is on NFS. To be sure that the problem is not coming
from nfs, I put $HOME/.scim on my local dist through a soft link, but
maybe other directories in $HOME are involved, dunno.

Basically, I think this is a bug related to connecting to the socket. If
I "start fresh", that is I unset GTK_IM_MODULE (and XMODIFIERS and
XIM_INPUT) and do not automatically launch scim in my session, I then do
the following:
    - start scim manually in a terminal (with scim -d)
    - in the same terminal, I launch an application this way:
GTK_IM_MODULE=scim strace app

Any application hangs at the following call:

connect(17, {sa_family=AF_FILE, path="/tmp/scim-socket-frontend-david"},
33) = 0

After sometimes (around one minute, generally), the application
continues, but then the problem appears again when I want to use the
kanji configuration (at the same system call). After again sometimes,
the app continues, but without the kanji configuration.

Besides $HOME on NFS, the other thing which is really peticular in my
setup, and maybe related, is that I do not have any DNS server on my
network. All connection are done through a proxy (I have http_proxy set
to the proxy). Again, not sure it is related, but it also has been the
cause of problems with other softwares,

At this point, I am ready to use a debugging version of scim :)

David