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| Heratbeat/Disconnect Intervel Problems |
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| Luca81 |
 Posted: Tue Jun 19, 2007 11:34 pm Post subject: Heratbeat/Disconnect Intervel Problems |
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Acolyte
Joined: 01 Mar 2007
Posts: 62
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Hi to all.
One/two times/month I have the problem "Maximun Number of Channels Reached".
I'm on version MQ5.3. CSD10 on window 2003 platform
Sometimes I have a channel (Server Connection) with a lot (big lot  ) of opened connections... I think are broken connections (we have a lot of networks problems with routers ecc ecc)...
Browsing the channels I have a lot of connections with last message sent 2/3 days ago... why? We are in production enviroment and the channel Heartbeat is 300. Why Heartbeat does not work? On documentation I can read:
The Heartbeat Interval or HBINT is the channel attribute which controls how often the sending end of the Channel should check that the receiver is ok when there are no messages to send. The value is specified in seconds on both ends of the channel and they negotiate an appropriate value to use at channel startup. This value is the least frequent interval of the two specified. If one or both ends specifies 0 which means no heartbeats, then this value, being the least frequent value possible, is the
one chosen.
KeepAvile checkbox (I'm on win so I don't have MQ.INI) is disabled and AdoptNewMCA check box is disable.
Can u help me to solve this problem?
Thx a lot
LUCA |
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| Nigelg |
| Posted: Wed Jun 20, 2007 12:39 am Post subject: |
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Grand Master
Joined: 02 Aug 2004
Posts: 1046
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From the runmqsc manual
| Quote: |
HBINT(integer)
This parameter has a different interpretation depending upon the channel type, as follows:
For channels with a channel type (CHLTYPE) of SDR, SVR, RCVR, RQSTR, CLUSSDR, or CLUSRCVR, this is the time, in seconds, between heartbeat flows passed from the sending MCA when there are no messages on the transmission queue. The heartbeat exchange gives the receiving MCA the opportunity to quiesce the channel.
Note:
You should set this value to be significantly less than the value of DISCINT. WebSphere MQ checks only that it is within the permitted range however.
For channels with a channel type (CHLTYPE) of SVRCONN or CLNTCONN, this is the time, in seconds, between heartbeat flows passed from the server MCA when that MCA has issued an MQGET with WAIT on behalf of a client application. This allows the server to handle situations where the client connection fails during an MQGET with WAIT.
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| Luca81 |
| Posted: Wed Jun 20, 2007 12:49 am Post subject: |
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Acolyte
Joined: 01 Mar 2007
Posts: 62
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| Nigelg wrote: |
From the runmqsc manual
| Quote: |
HBINT(integer)
This parameter has a different interpretation depending upon the channel type, as follows:
For channels with a channel type (CHLTYPE) of SDR, SVR, RCVR, RQSTR, CLUSSDR, or CLUSRCVR, this is the time, in seconds, between heartbeat flows passed from the sending MCA when there are no messages on the transmission queue. The heartbeat exchange gives the receiving MCA the opportunity to quiesce the channel.
Note:
You should set this value to be significantly less than the value of DISCINT. WebSphere MQ checks only that it is within the permitted range however.
For channels with a channel type (CHLTYPE) of SVRCONN or CLNTCONN, this is the time, in seconds, between heartbeat flows passed from the server MCA when that MCA has issued an MQGET with WAIT on behalf of a client application. This allows the server to handle situations where the client connection fails during an MQGET with WAIT.
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yes yes I read...
So? What can I do for prevent this situation where I have a Server Connection channel with a lot of opened pending connections? Browsing the channels I have a lot of connections with last message sent 2/3 days ago... what is MCA exactly?
Thx for help
Luca |
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| jefflowrey |
| Posted: Wed Jun 20, 2007 1:38 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Why is AdoptNewMCA turned off? It seems like it might be what you want to use in this situation.
Nigel answered your question, though, about why HBINT wasn't working. That bit there about "MQGET with WAIT".
Also, it seems strange that the connection wouldn't have timed out at the TCP/IP level in two to three days, if it was really broken.
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I am *not* the model of the modern major general. |
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| Luca81 |
| Posted: Wed Jun 20, 2007 3:34 am Post subject: |
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Acolyte
Joined: 01 Mar 2007
Posts: 62
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| jefflowrey wrote: |
Why is AdoptNewMCA turned off? It seems like it might be what you want to use in this situation.
Nigel answered your question, though, about why HBINT wasn't working. That bit there about "MQGET with WAIT".
Also, it seems strange that the connection wouldn't have timed out at the TCP/IP level in two to three days, if it was really broken. |
hi
Maybe client did not close the connection... So it is not broken...
But on Server Connection channels I can't insert the disconnect interval...
But only the HBINT... Can you explain me (in easy words) what is the HBINT in a Server Connection Channel?
Thx you |
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| jefflowrey |
| Posted: Wed Jun 20, 2007 4:00 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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The documentation quoted here is very precise on what HBINT for SVRCONNs means.
It's the time between heartbeat flows during an MQGET with WAIT.
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