https://issues.apache.org/bugzilla/show_bug.cgi?id=48903
Summary: ClassLoader deadlock when compiling JSP pages in
6.0.26
Product: Tomcat 6
Version: 6.0.26
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: knst.koli...@gmail.com
Created an attachment (id=25123)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=25123)
threads_20100313_0109.txt - thread dump
Steps to reproduce:
1. Install TC 6.0.26
I am using Sun JRE 6u18
2. Download tomahawk-examples-1.1.8-bin.zip from
http://myfaces.apache.org/tomahawk/download.html
and copy myfaces-example-simple-1.1.8.war from the archive to the webapps
folder of Tomcat
3. Start Tomcat and browse http://localhost:8080/myfaces-example-simple-1.1.8/
4. Try to open several links (Sample 1, .. Filtered Stylesheet) at the same
time.
I am using Snap Links plugin for Firefox, http://snaplinks.mozdev.org/
5. Several Tabs are opened in the browser to load the pages, but pages never
load.
6. Using jvisualvm tool I can see that there is a deadlock in Tomcat. The
thread dump is attached.
Citing from the dump:
Found one Java-level deadlock:
=============================
"http-8080-6":
waiting to lock monitor 0x1731bafc (object 0x08189dd0, a
org.apache.catalina.loader.WebappClassLoader),
which is held by "http-8080-1"
"http-8080-1":
waiting to lock monitor 0x1731b88c (object 0x13bdb118, a java.lang.String),
which is held by "http-8080-5"
"http-8080-5":
waiting to lock monitor 0x1731bafc (object 0x08189dd0, a
org.apache.catalina.loader.WebappClassLoader),
which is held by "http-8080-1"
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