Bug 54072

Summary: Connection rejection leads to hosed system
Product: [Retired] Red Hat Linux Reporter: Bertil Askelid <bertil>
Component: sendmailAssignee: Florian La Roche <laroche>
Status: CLOSED NOTABUG QA Contact: David Lawrence <dkl>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.1   
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2001-09-26 16:52:39 EDT Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Bertil Askelid 2001-09-26 16:52:33 EDT
Description of Problem:

For some unknown reason, sendmail occasionally (days weeks in between)
starts to reject connections:

	Sep 25 19:45:42 pop sendmail[23360]: rejecting connections on       
   	daemon MTA: load average: 12

I have a standard sendmail configuration as it comes from Red Hat. Sendmail
only listens to the localhost interface. Besides, my ipchains blocks any
access from the outside.

The rejections continue and after a couple of hours, the system is hosed:

	Sep 25 22:23:37 pop sendmail[23360]: runqueue: Skipping queue run
	-- load average too high
	Sep 25 22:23:42 pop sendmail[23360]: rejecting connections on
	daemon MTA: load average: 83

Unable to create new processes, so only way out is a power cycled reboot.

Version-Release number of selected component (if applicable):

	sendmail-8.11.6-1.7.1

How Reproducible:

	Random

Steps to Reproduce:
1. Don't know
2. 
3. 

Actual Results:


Expected Results:


Additional Information:
Comment 1 Florian La Roche 2001-12-08 04:46:45 EST
There is a load limit and sendmail won't accept/deliver email if it is
too high. So looks like normal behaviour.

Florian La Roche
Comment 2 Bertil Askelid 2001-12-08 10:26:08 EST
How can the load limit be reached when my system is under no load at all. No
emails being handled except for maybe 1 or 2 an hour? This is a home system with
just a very few users. And sendmail is not accessible for email reception from
the outside as all outside connections are firewalled. I use POP to fetch
emails.

Please explain!