https://issues.apache.org/bugzilla/show_bug.cgi?id=52213
Bug #: 52213
Summary: Field
"org.apache.catalina.tribes.transport.bio.util.FastQue
ue.enabled" should be volatile.
Product: Tomcat 7
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: reprogram...@gmail.com
Classification: Unclassified
The boolean flag
"org.apache.catalina.tribes.transport.bio.util.FastQueue.enabled" may be
read/written by multiple threads concurrently (See
<http://svn.apache.org/repos/asf/!svn/bc/1203897/tomcat/trunk/java/org/apache/catalina/tribes/group/interceptors/MessageDispatchInterceptor.java>).
Therefore, accesses to it should be properly synchronized. It is sufficient to
make this boolean flag volatile to protect access to it.
See
<https://www.securecoding.cert.org/confluence/display/java/VNA00-J.+Ensure+visibility+when+accessing+shared+primitive+variables>
for more information about this bug pattern.
Keshmesh (https://keshmesh.cs.illinois.edu/) is an Eclipse plugin that
analyzes the source code of Java programs for common concurrency bug patterns.
We used Keshmesh to detect this concurrency bug pattern.
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