https://issues.apache.org/bugzilla/show_bug.cgi?id=43683
--- Comment #18 from Joe Kislo <[EMAIL PROTECTED]> 2008-06-25 08:32:23 PST ---
Well that's frustrating :) I've done some work on it today to try to narrow
down when it happens.
I've written a java program that will make the required calls to the URLs in
parallel to cause the issue. I wrapped it in a loop, and it happened the first
time I ran it! Then I ran it again, and let it run for 2 hours without it
happening once.
Then I restarted tomcat, and it happened first time!
So it seems to happen a lot *more* when tomcat has first started... but still
not every time. I'm using Sun's 1.5.0_15 jvm if that somehow makes a
difference.
So I am attaching a unix shell script that will start+stop tomcat between each
test run, and my java program that does the URL calling. You may need to tweak
a couple variables to make this work on your machine:
TestServiceDuringDestroy.sh:
TOMCAT_BIN_DIR - Set this to where the catalina.sh script is
TestServiceDuringDestroy.java:
TESTCASE3_URL - Put the url to testcase3 (the one that spins cpu during init)
RESTART_TOMCAT_URL - Put the url to restart that servlet
RESTART_TOMCAT_BASIC_AUTH - Put in the basic authentication credentials for
the manager servlet in format username:password
With those changes... I think that will get it going for you. The theory here
is:
while (true) {
start tomcat
Request the servlet
Restart the servlet
Request the servlet
stop tomcat
}
When the testcase fails you'll see something like this:
Using CATALINA_BASE: /var/tmp/tomcat/apache-tomcat-6.0.16
Using CATALINA_HOME: /var/tmp/tomcat/apache-tomcat-6.0.16
Using CATALINA_TMPDIR: /var/tmp/tomcat/apache-tomcat-6.0.16/temp
Using JRE_HOME: /usr/local/java
Sleeping for tomcat to start
Testcase Call 1: Requesting URL
Restart call: Requesting URL
Testcase Call 2: Requesting URL
Testcase Call 1: IOException in URL request
java.io.IOException: Server returned HTTP response code: 500 for URL:
http://localhost:8080/ServletRestartTest3/ServletRestartTest
at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1174)
at WebRequestThread.run(WebRequestThread.java:28)
Using CATALINA_BASE: /var/tmp/tomcat/apache-tomcat-6.0.16
Using CATALINA_HOME: /var/tmp/tomcat/apache-tomcat-6.0.16
Using CATALINA_TMPDIR: /var/tmp/tomcat/apache-tomcat-6.0.16/temp
Using JRE_HOME: /usr/local/java
Sleeping for tomcat to stop
---
In the cases where it tomcat succeeds, I see this on the server side:
INFO: Waiting for 1 instance(s) to be deallocated
I do not see that when my testcase fails.
FWIW, I am using a apache-tomcat-6.0.16 binary installation, and I dropped in
lib/* and bin/*.jar from a newly compiled trunk svn checkout from yesterday
(06-24-08)
Good luck!
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