https://bz.apache.org/bugzilla/show_bug.cgi?id=65476
Bug ID: 65476
Summary: Examples web application fails to start with Java 8
(NullPointerException at ExamplesConfig)
Product: Tomcat 9
Version: unspecified
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Examples
Assignee: dev@tomcat.apache.org
Reporter: knst.koli...@gmail.com
Target Milestone: -----
Testing release candidates for Tomcat 9.0.51 and 10.0.9,
the examples web application fails to start when running with Java 8 (8u292).
Trying to access http://localhost:8080/examples/ results in error 404 and in an
NullPointerException in a log file.
See
https://markmail.org/message/rbgoaevos2f556sr
https://markmail.org/message/fnn57hj2zqeilmaf
The error goes away if I use Java 11 (11.0.11) or Java 16 (16.0.1).
Stacktrace for Tomcat 10.0.9 is the following:
[[[
org.apache.catalina.startup.HostConfig.deployDirectory Error deploying
web application directory [C:\Program Files\Apache Software
Foundation\Tomcat 10.0\webapps\examples]
java.lang.IllegalStateException: Error starting child
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)
[... - well-known, skipping]
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:476)
Caused by: org.apache.catalina.LifecycleException: Failed to start
component
[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/examples]]
at
org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:726)
... 37 more
Caused by: java.lang.NullPointerException
at
websocket.ExamplesConfig.getAnnotatedEndpointClasses(ExamplesConfig.java:60)
at org.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:111)
at
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5168)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
... 38 more
]]]
Source code of ExamplesConfig:
https://github.com/apache/tomcat/blob/10.0.9/webapps/examples/WEB-INF/classes/websocket/ExamplesConfig.java#L54
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