https://issues.apache.org/bugzilla/show_bug.cgi?id=57425
Bug ID: 57425
Summary: ReplicatedContext implementation throws
NullPointerException for attributes with null value
Product: Tomcat 7
Version: 7.0.25
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: jlan...@gmail.com
In Tomcat versions prior to 7.0.35, the servlet context attribute
"javax.servlet.context.orderedLibs" has a null value (a fix was added to Tomcat
in https://issues.apache.org/bugzilla/show_bug.cgi?id=54391).
When context replication is not used, the StandardContext.setAttribute method
checks for and handles a null value by invoking
StandardContext.removeAttribute. However, when context replication is enabled
the null value is passed to ConcurrentHashMap.put which throws a
NullPointerException. This causes the context to fail startup.
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