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ID Category Severity Reproducibility Date Submitted Last Update
0004474 [Resin] minor always 04-04-11 10:23 04-05-11 12:43
Reporter ferg View Status public  
Assigned To ferg
Priority normal Resolution fixed  
Status closed   Product Version 4.0.16
Summary 0004474: multiple webapp instances (not versioned) in 4.0.16
Description (rep by Mattias Jiderhamn)

While evaluating Resin 4.0.16 we are seeing something that makes me really concerned. It appears as if after a redeploy there can be two instances of our main app running.

I was made aware of this by noticing that timed servlets (<run-at ... />) were having concurrency issues and logging the same event twice within the same second.
This made me add some extra logging in a <load-on-startup/> servlet, and I can actually see that at some reploys, the same web app is initialized twice - in different, concurrent threads and different classloaders.
For example one instance may be initialized by Thread[http://*:8080-776,5,main] [^] and at the same time (give or take a few seconds) another one by Thread[resin-366,5,main].

I cannot deliberately recreate it by simply redeploying (which makes it less likely to be a configuration issue). But it happens about daily on our test server; possibly issuing requests on a session in the app while redeploying is a factor.

We are not using versioning.
dependency-check-interval is set to 20 seconds.
The "extra" app does not appear in the admin console.

How can we figure out what is going on here???
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- Notes
04-05-11 11:15
edited on: 04-05-11 12:11



- Issue History
Date Modified Username Field Change
04-04-11 10:23 ferg New Issue
04-04-11 10:36 mate Issue Monitored: mate
04-04-11 11:31 briandeng Issue Monitored: briandeng
04-05-11 11:15 ferg Note Added: 0005152
04-05-11 12:11 ferg Note Edited: 0005152
04-05-11 12:43 ferg Assigned To  => ferg
04-05-11 12:43 ferg Status new => closed
04-05-11 12:43 ferg Resolution open => fixed
04-05-11 12:43 ferg version  => 4.0.16
04-05-11 12:43 ferg Fixed in Version  => 4.0.17

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