Hi Danh,
Good finding!
Ack from me.
Thanks, Vu.
> -----Original Message-----
> From: Danh Vo <danh.c...@dektech.com.au>
> Sent: Monday, July 16, 2018 11:27 AM
> To: hans.nordeb...@ericsson.com; lennart.l...@ericsson.com;
> gary....@dektech.com.au; vu.m.ngu...@dektech.com.au
> Cc: opensaf-devel@lists.sourceforge.net; Danh Vo
> <danh.c...@dektech.com.au>
> Subject: [PATCH 1/1] imm: two IMM coordinators exist in SC absence
> condition [#2895]
>
> When IMMND exits before IMMD, it has a chance for IMMD to elect new
> coordinator and then IMMD goes down. There are 2 events on node which
> has elected IMMND: INTRO_RSP and MDS_DOWN of IMMD. Because the
> priority
> of MDS_DOWN is higher than INTRO_RSP, IMMND handles MDS_DOWN
> event first
> and then it handles INTRO_RSP event to become a new coordinator. After
> IMMD is up again, other IMMNDs (except previous coordinator) try to send
> INTRO message to IMMD for coordinator election. As a result, 2
> coordinators exists. The solution for this issue is to drop INTRO_RSP
> message when IMMD has not been up yet.
> ---
> src/imm/immnd/immnd_evt.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/src/imm/immnd/immnd_evt.c b/src/imm/immnd/immnd_evt.c
> index 2b9123d..730c490 100644
> --- a/src/imm/immnd/immnd_evt.c
> +++ b/src/imm/immnd/immnd_evt.c
> @@ -10461,6 +10461,11 @@ static uint32_t
> immnd_evt_proc_intro_rsp(IMMND_CB *cb, IMMND_EVT *evt,
> TRACE_ENTER2("evt->info.ctrl.nodeId(%x) != cb->node_id:(%x) ?%u",
> evt->info.ctrl.nodeId, cb->node_id,
> evt->info.ctrl.nodeId != cb->node_id);
> + if (!immnd_is_immd_up(cb)) {
> + LOG_WA("IMMD has not been UP yet. Drop INTRO_RSP message.");
> + return NCSCC_RC_SUCCESS;
> + }
> +
> cb->mNumNodes++;
> TRACE("immnd_evt_proc_intro_rsp cb->mNumNodes: %u", cb-
> >mNumNodes);
> LOG_IN("immnd_evt_proc_intro_rsp: epoch:%i rulingEpoch:%u",
> --
> 2.7.4
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