Hi, I should have mentioned earlier that "init_module is actually a post_config hook" (I am a newbie as far as apache modules are concerned, thats y i missed it) yes, you are right "this would be more on-topic for the apache-modules list". I posted over there also, but this appears to be a very normal way to use shared-mutexes and I saw couple of in-built modules and they all (whatever i saw) seem to create and destroy the mutex in same way. and then I thought If someone already has seen something like this then this mailing list might be very useful. I would like to apologize if this is completely off the track :( But If anyone of you had seen this error and know some workaround then kindly help me out. I badly need to fix this issue. Thanks in advance. Sudhanshu -----Original Message----- From: Nick Kew [mailto:nick@xxxxxxxxxxxx] Sent: Mon 7/18/2005 10:16 PM To: users@xxxxxxxxxxxxxxxx Cc: Subject: Re: [users@httpd] HELP .... apr_pool_t and apr_global_mutex _ On Mon, 18 Jul 2005, Sudhanshu Prakash wrote: > Hi *, > > I am using apr_* api's in my apache module and scenario is like as > follows: > > 1) In init_module, I am creating one apr_global_mutex_t > and registering a cleanup function which destroys the mutex. init_module? The following in a post_config hook works fine for me: apr_global_mutex_create(&global_mutex, global_fname, APR_LOCK_DEFAULT, pool) ; unixd_set_global_mutex_perms(global_mutex) ; apr_pool_cleanup_register(pool, global_mutex, (void*)apr_global_mutex_destroy, apr_pool_cleanup_null) ; > > 2) In init_child, I am re-opening the same mutex using > apr_global_mutex_child_init Yep, that's right. > 3) During Graceful restart, there is a race condition between mutex > destruction and child-restart i.e. Mutex is destroyed first while old > httpd childrens are still running and throws an error "(22), Invalid > Argument". (This scenario is easy to replicate when http is pumped with > high number of http requests and simultaneously i do graceful restart) Hmmm, I haven't had that problem. You need to tell us what hook you are referring to as init_module. BTW, this would be more on-topic for the apache-modules list. -- Nick Kew --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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