Hi all,
I opened AXIS2C-1537 and attached two small patches which basically
contain the changes described below.
In my case it has helped - though I have to admit that I do not use the
"simple_axis2_server", therefore I have not tested the change in
http_server_main.c - it is rather intended to reflect what I have
changed in my own server code (see below [1]).
Some review is appreciated.
Rgds,
tge
On Thu, 2011-02-10 at 04:10 +0100, Thomas Gentsch wrote:
> Hi all,
>
> I experience some infrequent crashes at stopping an Axis server using
> axis2_http_server_stop(...);
> axis2_transport_receiver_free(...);
>
> Now it looks to me as if
> - axis2_http_server_stop() just closes the listening socket of the
> listener thread and sets "stopped" to true
> - then, the listener thread (in axis2_http_svr_thread_run) returns
> from axutil_network_handler_svr_socket_accept()
> and checks the worker:
> if (!svr_thread->worker) ...
> But:
> - axis2_transport_receiver_free() indirectly calls
> axis2_http_server_free() which in turn destroys and frees
> server_impl->svr_thread
>
> I'm not sure yet whether I understand this completely, but it looks as
> if then (depending on which thread is faster) the listener accessed
> memory now already freed.
>
> In a first approach I moved in my own server prog the
This is [1] as mentioned above
> axis2_transport_receiver_free() after starting the HTTP server, i.e.:
> if(axis2_transport_receiver_start(srv, env) == AXIS2_FAILURE)
> {
> // err handling
> }
> printf("Listener returned\n");
> axis2_transport_receiver_free(...);
>
> This changes things a bit, now the crash comes later in
> axis2_http_svr_thread_run
> axutil_thread_pool_get_thread(..., axis2_svr_thread_worker_func
> ...
> axutil_stream_free
>
> But the question is: Is it right that the listener continues at all
> after the accept() returns a failure?
> I have inserted another test for "stopped" and, if so, break the
> listener loop and, so far, it seems to be ok.
>
> axis2_http_svr_thread_run(...)
> {
> ...
> socket = (int)axutil_network_handler_svr_socket_accept(env,
> svr_thread-> listen_socket);
> if(svr_thread->stopped)
> {
> break;
> }
This is the other patch.
> Does that ring any bells? Could somebody more experienced please think
> about that scenario (while having a look into the code)?
>
> I'll do more testing and, hoping that all keeps working, create a defect
> +patch.
>
> Rgds,
> tge
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