ask each child process to do the same. We then monitor until all children have
exited.
The change to ap_start_shutdown(void) to ap_start_shutdown(int) may look like
an external API change, but the function is defined static, and used only in
one place.
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when it occurs during restart; it isn't at all uncommon then
when SysV semaphores are used for the accept mutex
same logic already in place for two other mutex calls
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generation in the scoreboard so that mod_status can accurately
represent workers in processes which are gracefully terminating.
New child processes with worker MPM can take over slots of
individual threads within gracefully terminating processes.
Sometimes this is a problem (too many of these gracefully
terminating processes), so it is helpful to have mod_status
provide the information required to recognize these processes.
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remain active after shutdown.
The problem occurred when a scoreboard entry currently
in use by an exiting child process was used for a new child
process. At that point, the MPM forgot about the exiting
child process, so ap_reclaim_child_processes() wouldn't be
able to forceably terminate it.
(An exiting child process may *never* exit due to a stuck
or long-running request being handled on one of the threads.)
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to override default thread stack size for threads which handle
client connections. Required for some third-party modules on
platforms with small default thread stack size.
This is also useful for trimming back the stack size on
platforms with relatively large default stack size in order to
conserve address space for supporting more threads per child.
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is at least FD_SETSIZE.
That isn't a problem for most users (since poll() is widespread).
On old boxes where select() must be used by APR, APR needs to fail
operations that don't work with such fds.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102419 13f79535-47bb-0310-9956-ffa450edef68
* server/mpm/worker/worker.c:
(listener_thread): create and add sockets to the pollset using the new
APIs. rearrange the round-robin a little bit to work with the new
pollset return values.
cleaning: get rid of an extraneous status variable. get rid of
obsoleted round-robin code.
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(the old code assumed that apr_atomic_t and apr_uint32_t were interchangeable).
Also, add more detailed comments on how one of the synchronization
functions works.
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because of the changes to the argument lists of apr_mmap_dup and apr_socket_create,
2.1-dev won't build with apr and apr-util's 0.9 branch anymore
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when necessary. Which is to say that it's necessary in all cases except
for prefork, where the change to apr-util to have it use the allocator
from the pool passed in is already sufficient.
Reviewed by: Jean-Jacques Clar, Sander Striker, Brad Nicholes
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a note on perchild:
perchild exception handling was busted before this and is still busted
the problem I noticed was that a client that exposes a segfault never
gets its connection dropped and the parent never notices that the
child process that segfaulted hasexited
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