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| Can COA be sent before a receiver transaction commit? |
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| Author |
Message
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| Maykel |
 Posted: Thu May 12, 2005 5:43 am Post subject: Can COA be sent before a receiver transaction commit? |
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Newbie
Joined: 12 May 2005
Posts: 1
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Hi All,
I've noticed very strange behavior of client's system.
There's QM_SDR on W2k and a QM_RCVR on HP-UX 11.11. Both 5.3 CSD 07.
QM_SDR sends a message to QM_RCVR. A receiver channel on QM_RCVR has a message exit defined which stamps a message in PutAppName header field with current time.
It looks like this
| Code: |
void MQENTRY MsgExit( PMQCXP pChannelExitParams,
PMQCD pChannelDefinition,
PMQLONG pDataLength,
PMQLONG pAgentBufferLength,
PMQBYTE AgentBuffer,
PMQLONG pExitBufferLength,
PMQPTR pExitBufferAddr)
{
switch( pChannelExitParams-> ExitReason )
{
case MQXR_MSG:
{
time_t clock = time( (time_t*) NULL);
struct tm *tmptr = localtime(&clock);
char* appField = (char*) ( ((PMQXQH) AgentBuffer) -> MsgDesc).PutApplName;
memset(appField,0,MQ_PUT_APPL_NAME_LENGTH);
sprintf( appField, TIME_FORMAT,
tmptr->tm_year+1900,
tmptr->tm_mon+1,
tmptr->tm_mday,
tmptr->tm_hour,
tmptr->tm_min,
tmptr->tm_sec % 59 );
break;
}
default:
break;
} /* switch */
pChannelExitParams -> ExitResponse = MQXCC_OK;
return;
}/* end exit */
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It always happened that timestamp in message exits was same as COA timestamp generated by QM_RCVR. Until yesterday.
QM_SDR was down because of failure for about half on hour.
It received COA with message timestamp 11:00:00. Timestamp in message PutApplName header field read by QM_RCVR client was 11.30:05. If the QM_RCVR client cannot parse PutApplName field according to time format (eg. there was no message exit defined on a channel - not in this case ) it assumes MQGET time. It was indeed 11.30:05.
My question is : Is it possible for QM_RCVR to generate a COA and then after 30 minutes run message exit on receiving channel to stamp a message (and do the commit on receiver queue)?
Or is it possible that message exit was not executed because of...(no idea) ?
Regards,
Maykel |
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