Error when adding ContextListner

[Noriyuki TAKEI]

Hi, all.

I edited the web.xml for launching the Listener class in Shibboleth IdP
v5.0.0 as follows:

<listener>
    <display-name>ContosoAuthnContextListener</display-name>

<listener-class>com.example.idp.shibboleth.contoso.servlet.ContosoAuthnContextListener</listener-class>
</listener>

Then, I received the following error:

2023-10-20 15:47:11.101:WARN :oejw.WebAppContext:main: Failed startup of
context o.e.j.w.WebAppContext at b2c9a9c{Shibboleth Identity
Provider,/idp,[file:///opt/jetty-base/tmp/jetty-127_0_0_1-80-idp_war-_idp-any-164522878908199773/webinf/,
jar:file:///opt/shibboleth-idp/war/idp.war!/],UNAVAILABLE}{/opt/shibboleth-idp/war/idp.war}
java.lang.IllegalStateException: No WebApplicationContext found: no
ContextLoaderListener registered?
at
org.springframework.web.context.support.WebApplicationContextUtils.getRequiredWebApplicationContext(WebApplicationContextUtils.java:85)
...omit...


Subsequently, I added the following content to the web.xml:

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

After that, I encountered another error:

2023-10-20 16:04:26.149:WARN :oejw.WebAppContext:main: Failed startup of
context o.e.j.w.WebAppContext at b2c9a9c{Shibboleth Identity
Provider,/idp,[file:///opt/jetty-base/tmp/jetty-127_0_0_1-80-idp_war-_idp-any-18363158295659732048/webinf/,
jar:file:///opt/shibboleth-idp/war/idp.war!/],UNAVAILABLE}{/opt/shibboleth-idp/war/idp.war}
java.lang.IllegalStateException: Cannot initialize context because there is
already a root application context present - check whether you have
multiple ContextLoader* definitions in your web.xml!
at
org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:247)

Do you have any solutions to this issue?
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