Bug#924679: guacamole: Does not start on Tomcat8 with message "Error deploying configuration descriptor"

[Dmitry Katsubo]

Package: guacamole
Version: 0.9.9+dfsg-1

After update from Stretch (Tomcat 8.5.14-1+deb9u3) to Buster (Tomcat 8.5.38-2) Guacamole does not deploy anymore:

[2019-03-14 23:42:08] [info] 14-Mar-2019 23:42:05.234 SEVERE [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Error deploying configuration descriptor [/etc/tomcat8/Catalina/localhost/guacamole.xml]
[2019-03-14 23:42:08] [info]  java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/guacamole]][2019-03-14 23:42:08] [info] #011at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:758)
[2019-03-14 23:42:08] [info] #011at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
[2019-03-14 23:42:08] [info] #011at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
[2019-03-14 23:42:08] [info] #011at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:629)
[2019-03-14 23:42:08] [info] #011at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1839)
[2019-03-14 23:42:08] [info] #011at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[2019-03-14 23:42:08] [info] #011at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[2019-03-14 23:42:08] [info] #011at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
...
[2019-03-14 23:42:08] [info] 14-Mar-2019 23:42:05.241 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDescriptor Deployment of configuration descriptor [/etc/tomcat8/Catalina/localhost/guacamole.xml] has finished in [690] ms

The problem reports I found ([1], [2]) suggest updating to Guacamole v0.9.14 or later (see bug #887465).

[1] http://mail-archives.apache.org/mod_mbox/guacamole-user/201808.mbox/%3cCALKeL-Pmqh7VvF=jdW02xCqD3AxUTA-QAchiSTmOSum4McwY3w@mail.gmail.com%3e
[2] https://www.mail-archive.com/user@guacamole.apache.org/msg01168.html

-- 
With best regards,
Dmitry