May i know what is the cause for message spool ingress discards? How to prevent it? How to troubleshoot the issue?
I think i know the issue. I created a queue and add the topic to queue subscription. As a result, the number of message spool ingress discard did not increase.
I guess it was because i am publish direct message to the broker with no topic subscription to any queue or client. As a result, the messages are discarded by the broker.
Publishing messages as Direct shouldn’t affect your message-spool stats? Unless promotion is occurring and something is wrong with a queue (e.g. over quota). If you do a show message-spool stats it should provide a breakdown of that top-line number:
show message-spool stats
************** Ingress Spool Discard Statistics **************************
Spooling Not Ready: 0
Out Of Order Messages: 0
Duplicate Messages: 0
No Eligible Destinations: 4193
Spool Over Quota: 0
Queue/Topic-Endpoint Over Quota: 0
Replay-Log Over Quota: 0
Max. Message Usage Exceeded: 0
Max. Message Size Exceeded: 0
Remote Router Spooling Not Supported: 0
Spool To ADB Fail: 0
Spool To Disk Fail: 0
Spool File Limit Exceeded: 0
<SNIP>
Or: show message-spool message-vpn <blah> stats