https://issues.apache.org/bugzilla/show_bug.cgi?id=50597
Summary: Class.newInstance is used for Dynamic instance filters
causing InstantiationException
Product: Tomcat 7
Version: 7.0.6
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: mli...@juma.me.uk
Class.newInstance is called even when the following method
ServletContext.addFilter method is called:
javax.servlet.FilterRegistration.Dynamic addFilter(java.lang.String s,
javax.servlet.Filter filter);
This leads to an InstantiationException at runtime if there is no no-args
constructor for the filter (pasted below). I'll supply a simple patch that
fixes the issue for me.
SEVERE: Exception starting filter testFilter
java.lang.InstantiationException: test.TestFilter
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at
org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultIn
stanceManager.java:119)
at
org.apache.catalina.core.ApplicationFilterConfig.getFilter(Applicatio
nFilterConfig.java:252)
at
org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(Applica
tionFilterConfig.java:372)
at
org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFi
lterConfig.java:98)
at
org.apache.catalina.core.StandardContext.filterStart(StandardContext.
java:4382)
at
org.apache.catalina.core.StandardContext$2.call(StandardContext.java:
5040)
at
org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5035)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
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