https://issues.apache.org/bugzilla/show_bug.cgi?id=56082
Bug ID: 56082
Summary: ConcurrentModificationException with
org.apache.juli.ClassLoaderLogManager
Product: Tomcat 7
Version: 7.0.42
Hardware: PC
OS: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Created attachment 31267
--> https://issues.apache.org/bugzilla/attachment.cgi?id=31267&action=edit
Source to reproduce
In Tomcat, java.util.logging.LogManager.getLogManager() is in general an
instance of org.apache.juli.ClassLoaderLogManager.
In a webapp, when iterating over the result of
LogManager.getLogManager().getLoggerNames(), a ConcurrentModification can
sometimes occur.
To reproduce :
- download attached test-1.0.zip
- run "mvn clean package" using Maven
- copy "target/test-1.0.war" into tomcat/webapps
- start Tomcat
- see a lot of "Issue reproduced: java.util.ConcurrentModificationException" in
the System output
This webapp uses simple Logger.getLogger(String) and
LogManager.getLoggerNames() in threads.
I my case, this is reproduced using Tomcat 7.0.42 and JDK 1.7.
I suppose that a copy of the result could be made in
org.apache.juli.ClassLoaderLogManager.getLoggerNames()
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