https://issues.apache.org/bugzilla/show_bug.cgi?id=50293
Summary: javax.el.CompositeELResolver synchronization issue
Product: Tomcat 7
Version: trunk
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Servlet & JSP API
AssignedTo: [email protected]
ReportedBy: [email protected]
Created an attachment (id=26310)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=26310)
Synchronize change in CompositeELResolver.add
The javax.el.CompositeELResolver.add method needs to synchronize around the
update to the resolvers. If two threads call add, then it is possible for both
threads get past the size check, then one thread updates the size, and when the
next thread tries to update the size, it fails with an
ArrayIndexOutOfBoundsException.
Also, it makes sense to increase the default size of the ELResolver array since
even the jasper EL adds 5 ELResolvers. I propose a default of 8.
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