Crash when reusing svc_client with non-blocking call
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Key: AXIS2C-1551
URL: https://issues.apache.org/jira/browse/AXIS2C-1551
Project: Axis2-C
Issue Type: Bug
Components: core/clientapi
Affects Versions: 1.6.0
Environment: windows
Reporter: Leo Wang
Priority: Critical
; I have an issue when I try using non-blocking axis2/c call to access a web
service. Please help me.
The pseudo code is as follow,
Firstly, start a web request as follow,
axis2_callback_t *callback = axis2_callback_create(env);
axis2_callback_set_on_complete(callback, callback_on_complete);
axis2_callback_set_on_error(callback, callback_on_error);
axis2_svc_client_send_receive_non_blocking(svc_client, env,
the_1st_request, callback);
In callback_on_complete, I try let the same svc_client to send out the 2nd
request,
axis2_callback_t *callback = axis2_callback_create(env);
axis2_callback_set_on_complete(callback, callback_on_complete);
axis2_callback_set_on_error(callback, callback_on_error);
axis2_svc_client_send_receive_non_blocking(svc_client, env,
the_2nd_request, callback);
The problem is, when the 2nd non-blocking call makes the process crash.
I debugged into the code; It seems send_receive_non_blocking puts the
corresponding blocking method to thread pool, and the thread sent the request
and get the response, the callback_on_complete get executed. Unfortunately, the
thread doesn't exit immediately, it try to free something;
if (args_list->callback)
{
axis2_callback_invoke_on_complete(args_list->callback,
th_env,
args_list->op_client->async_result);
axis2_callback_set_complete(args_list->callback, th_env, AXIS2_TRUE);
}
/* Clean up memory */
axis2_async_result_free(args_list->op_client->async_result, th_env);
But the 2nd thread, started by axis2_svc_client_send_receive_non_blocking in
callback_on_complete, has freed the op_client before the 1st thread tries
freeing op_client->async_result.
Please tell me how to check if one non-blocking call is completely done. I
mean, the svc_client is ready for reusing or deleting. It seems
callback_on_complete is not the answer.
BTW, Why my program works this way, is because it need upload some huge data to
server with SOAP/MTOM, the data has to be split into multiple packages;
otherwise one failure could make the resending data cost too much.
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