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** [tickets:#1977] imm: AdmReqContinuation is not removed when failing to
forward fevs**
**Status:** fixed
**Milestone:** 4.7.2
**Created:** Mon Aug 29, 2016 07:31 AM UTC by Hung Nguyen
**Last Updated:** Wed Aug 31, 2016 09:15 AM UTC
**Owner:** Hung Nguyen
The AdmReqContinuation is created as a special handling before forwarding the
A2ND_IMM_ADMOP fevs message.
~~~
if(evt->info.fevsReq.sender_count > 0x1) {
/* sender_count greater than 1 if this is an admop message.
This is to generate a request continuation at the client
node BEFORE sending the request over fevs. Otherwise there
is a risk that the reply may arrive back at the request node,
before the request arrives over fevs. This can happen because
the reply is not sent over the fevs "bottleneck".
*/
SaUint32T conn = m_IMMSV_UNPACK_HANDLE_HIGH(client_hdl);
SaInvocationT saInv = (SaInvocationT) evt->info.fevsReq.sender_count;
immModel_setAdmReqContinuation(cb, saInv, conn);
}
~~~
If it fails to forward the message, the continuation will remain
~~~
14:28:05.682050 osafimmnd [6633:immsv_evt.c:5473] T8 Received:
IMMND_EVT_A2ND_IMM_FEVS (14) from 2020f
14:28:05.682067 osafimmnd [6633:immnd_evt.c:2924] T2 sender_count: 51539607554
size: 102
14:28:05.682077 osafimmnd [6633:immnd_evt.c:3205] >> immnd_fevs_local_checks
14:28:05.682088 osafimmnd [6633:immnd_evt.c:3689] << immnd_fevs_local_checks
14:28:05.682095 osafimmnd [6633:ImmModel.cc:12492] >> setAdmReqContinuation
14:28:05.682101 osafimmnd [6633:ImmModel.cc:12493] T5 setAdmReqContinuation
<51539607554, 1376>
14:28:05.682110 osafimmnd [6633:ImmModel.cc:12495] << setAdmReqContinuation
14:28:05.682115 osafimmnd [6633:immnd_evt.c:3096] T2 ERR_TRY_AGAIN: Too many
pending FEVS message replies (> 16) rejecting request
14:28:05.682121 osafimmnd [6633:immnd_evt.c:3170] T2 SENDRSP FAIL 6
~~~
and a timeout will occur after 2\*DEFAULT_TIMEOUT_SEC=12 seconds.
~~~
14:28:17.817901 osafimmnd [6633:ImmModel.cc:13752] T5 Timeout on
AdministrativeOp continuation 51539607554 tmout:12
14:28:17.818063 osafimmnd [6633:ImmModel.cc:12579] T5 REQ ADM CONTINUATION 1376
FOUND FOR 51539607554
14:28:17.818115 osafimmnd [6633:immnd_proc.c:1128] WA Timeout on syncronous
admin operation 2
~~~
When the timeout occurs, IMMND will send a ND2A_IMM_ERROR response with
ERR_TIMEOUT to the client. That can be very dangerous if the client is invoking
a sync IMM API. The client may get unexpected ERR_TIMEOUT in that case.
The continuation must be removed if it fails to forward the fevs.
---
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