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Extended session command support to cover COM_CHANGE_USER, and COM_INIT_DB.

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This implementation doesn't guarantee execution order between session commands and queries
if other backend server lags behind in session command execution.

In poll.c : moved processing of EPOLLERR and EPOLLHUP after processing of EPOLLIN and EPOLLOUT.
This ensures that COM_QUIT messages are read and routed forward before signals arrive (from local client/backend).
This commit is contained in:
VilhoRaatikka
2014-03-14 13:25:37 +02:00
parent cb6a976555
commit a3f7eebdc9
8 changed files with 233 additions and 293 deletions
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8
server/core/dcb.c
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@ -698,8 +698,7 @@ dcb_write(DCB *dcb, GWBUF *queue)
dcb->fd)));
return 0;
}
spinlock_acquire(&dcb->writeqlock);
if (dcb->writeq != NULL)
@ -809,9 +808,9 @@ dcb_write(DCB *dcb, GWBUF *queue)
pthread_self(),
w,
dcb,
STRDCBSTATE(dcb->state),
STRDCBSTATE(dcb->state),
dcb->fd)));
}
} /*< while (queue != NULL) */
/*<
* What wasn't successfully written is stored to write queue
* for suspended write.
@ -829,7 +828,6 @@ dcb_write(DCB *dcb, GWBUF *queue)
saved_errno != EAGAIN &&
saved_errno != EWOULDBLOCK)
{
queue = gwbuf_consume(queue, gwbuf_length(queue));
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Error : Writing to %s socket failed due %d, %s.",