Bug was identified by test, but it couldn't be validated. Using RW Split router currently may lead to situation where after setting system variable there is a backend server which doesn't have the value set. This is an incomplete feature at the moment rather than a bug.
dcb.c:dcb_write accept also dcb state DCB_STATE_NOPOLLING since it only means that dcb has been removed from epoll set but it is still possible to write to it.
Bug #384http://bugs.skysql.com/show_bug.cgi?id=384
session.h:added new state for SESSION, SESSION_STATE_ROUTER_READY which follows SESSION_STATE_READY. The difference is that ROUTER_READY is set only after router session is successfully created while READY means that session still lacks router.
session.c:set SESSION_STATE_ROUTER_READY when router is created.
mysql_backend.c:gw_read_backend_event, added SESSION_STATE_ROUTER_READY check before router session is closed. Changed chec kso that it doesn't block in infinite loop (although it shouldn't be possible anyway).
mysql_backend.c:gw_error_backend_event, added similar check before session is closed.
If backend authentication fails, wait until session has created router_client_session before reading the session->router_session pointer value. There should only be one case where this situation occurs : when session is being initialized concurrently with authentication. Only consequence is to close router_client_session immediately after session initialization is completed.
With the routines for key/value copy and free it is possible to
duplicate or free different data types in the hash tables.
The user_alloc() routine is the first example.
if ioctl() return 0 bytes, recv(..., MSG_PEEK) is called, reading 1 byte.
if recv returns 0 or -1 the socket is closed and dcb->func.close(dcb) is called.
Client, session and backend connections will be closed
Tested with 4 MaxScale running threads
Added macros which allow for testing locally if log is enabled or not.
server/Makefile
Added directory creation command to Makefile. This fixes problem where errmsg.sys was copied to MaxScale/mysql instead of MaxScale/mysql/errmsg.sys
dcb.b
Added external variable which carries the information of enabled logs from log_manager.cc
gateway.c
Tuned logging.
