• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 689
  • Last Modified:

Inconsistent JavaMail Performance

I have a Java web application using Apache & Tomcat on a Linux server with SendMail as my mail server. After years without an issue, I have suddenly experienced wide performance swings when sending out an email via my web app. From < 1 second to > 20 seconds. It is very sporadic and on some days it is consistently really slow ( > 30 seconds).  Any ideas on how/why this could happen and what can be done about it?
0
scott_m_ruby
Asked:
scott_m_ruby
  • 5
  • 2
1 Solution
 
jar3817Commented:
What do you mail logs say is going on? Look at /var/log/maillog
0
 
scott_m_rubyAuthor Commented:
Everything looks good in the maillog. Is there anything else to check?
0
 
scott_m_rubyAuthor Commented:
The other really odd thing is that it seems like every other day it gets very slow to send an email all day. It has taken between 20-30 seconds to send every email today. When I say the logs look good, I mean that there are no errors. Is there something else in the logs that might be telling?
0
Cloud Class® Course: Microsoft Office 2010

This course will introduce you to the interfaces and features of Microsoft Office 2010 Word, Excel, PowerPoint, Outlook, and Access. You will learn about the features that are shared between all products in the Office suite, as well as the new features that are product specific.

 
jar3817Commented:
I would look at the times for each entry related to one of these messages, to see perhaps at what stage of sending the mail it gets delayed. Have you checked your DNS setup? It could just be related to the time it takes to resolve the IP of the server it needs to send to. Do you run your own resolver or are you using your ISP's?
0
 
scott_m_rubyAuthor Commented:
I have added some additional logging to see if I can better track the delay, as you suggest. We don't run our own resolver.
0
 
scott_m_rubyAuthor Commented:
My logging is indicating that after executing my send method (Java Mail API )  it may take 25 seconds to return from the method call. The entry in the maillog will typically show up about 15 seconds after the send method has completed. It matches the exact delay value indicated in the maillog.
0
 
scott_m_rubyAuthor Commented:
Rebooting my entire server resolved the problem.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

  • 5
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now