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Peter,

On 7/30/19 05:19, logo wrote:
> Hi Chris,
> 
> I am also trying to figure this out and get to the same error.
> 
>> Am 25.07.2019 um 17:53 schrieb Joseph Dornisch
>> <kingcanut...@gmail.com>:
>> 
>> Hello,
>> 
>> I have a CRL configured in my tomcat server configuration. If I
>> update it and want to have Tomcat refresh it, I can login into 
>> https://127.0.0.1/manager/html and click the "Re-read" button
>> under "Configuration->Re-read TLS configuration files" and this
>> causes my CRL to be reread. It works great.
>> 
>> However,I have read here, " 
>> https://people.apache.org/~schultz/ApacheCon%20NA%202018/Let's%20Encr
ypt%20Apache%20Tomcat.pdf"
>>
>> 
on page 34 you can do basically the same thing with a command something
>> like: 
>> https://localhost/manager/jmxproxy?invoke=Catalina%3Atype%3DProtocolH
andler%2Cport%3D8443%2Caddress%3D%22127.0.0.1%22&op=reloadSslHostConfigs
>>
>>
>> 
When I do this, I get back:
>> 
>> Error - java.lang.NullPointerException 
>> java.lang.NullPointerException at
>> org.apache.catalina.manager.JMXProxyServlet.invokeOperationInternal(J
MXProxyServlet.java:264)
>>
>> 
at
org.apache.catalina.manager.JMXProxyServlet.invokeOperation(JMXProxyServ
let.java:207)
>> at
>> org.apache.catalina.manager.JMXProxyServlet.doGet(JMXProxyServlet.jav
a:116)
>>
>> 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) 
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:231)
>>
>> 
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:166)
>> at
>> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52
)
>>
>> 
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:193)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166)
>>
>> 
at
com.arl.servlet.core.filters.AbstractRedirectFilter.doFilter(AbstractRed
irectFilter.java:250)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:193)
>>
>> 
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:166)
>> at
>> com.arl.servlet.core.filters.UrlRewriteFilter.doFilter(UrlRewriteFilt
er.java:356)
>>
>> 
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:193)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166)
>>
>> 
at
com.arl.servlet.core.filters.SetCharacterEncodingFilter.doFilter(SetChar
acterEncodingFilter.java:128)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:193)
>>
>> 
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt
erChain.java:166)
>> at
>> org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCh
aracterEncodingFilter.java:109)
>>
>> 
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica
tionFilterChain.java:193)
>> at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166)
>>
>> 
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv
e.java:199)
>> at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:96)
>>
>> 
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authenticator
Base.java:610)
>> at
>> org.apache.catalina.valves.RequestFilterValve.process(RequestFilterVa
lve.java:348)
>>
>> 
at
org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:5
2)
>> at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:137)
>>
>> 
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java
:81)
>> at
>> org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAcce
ssLogValve.java:660)
>>
>> 
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.
java:87)
>> at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:343)
>>
>> 
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:79
8)
>> at
>> org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLig
ht.java:66)
>>
>> 
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractPro
tocol.java:808)
>> at
>> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpo
int.java:1498)
>>
>> 
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.j
ava:49)
>> at
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1149)
>>
>> 
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.ja
va:624)
>> at
>> org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskTh
read.java:61)
>>
>> 
at java.lang.Thread.run(Thread.java:748)
>> 
>> Is this command supposed to work in Tomcat 8.5.43? Is there a
>> different command. Short of this, the only way to force reload
>> without manual intervention seems to be to login to the manager
>> from code, and then execute 
>> https://127.0.0.1/manager/html/sslReload?org.apache.catalina.filters.
CSRF_NONCE=
>>
>> 
<nonce_value_from_established_session>
>> 
>> I've seen that I might also write some code that Tomcat itself
>> would run periodically to refresh the SSL configuration. Could
>> anyone provide any ideas here?
> 
> If I query with the jmxproxy-Servlet I get to 
> Catalina:type=ProtocolHandler,port=8443, but I cannot figure out
> the necessary address. How can I find it? Once I add an address
> (127.0.0.1, localhost or DNSs...) , I get exactly "OK - Number of
> results: 0". That may be the cause of the above
> java.lang.NullPointerException.
> 
> If I omit the address it I get a detailed stacktrace, with all
> sorts of IO exceptions/Illegal argument exceptions that relate to
> the actual code of AbstractJsseEndpoint/AbstractEndpoint and
> reloadSslHostConfigs.
> 
> Could you please help us here? If I only want to reload one
> specific HostConfig, how do I set the hostname parameter?
> 
> I looked at your letsencrypt script 
> https://people.apache.org/~schultz/ApacheCon%20NA%202018/lets-encrypt-
renew.sh,
>
> 
but that requires the address already as a parameter...

The best thing to do is connect with a JMX client such as VisualVM or
perhaps one that your IDE provides. If you connect, you can see what
JMX paths are actually available instead of just guessing at them.

Use the screenshots in the Let's Encrypt presentation (and possibly
the related screenshots in the "Monitoring Apache Tomcat with JMX"
presentation as well) to help you find the correct protocol handler path
.

- -chris
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