Bug#959937: tomcat9: update to tomcat9:amd64 9.0.31-1~deb10u1 breaks application

[Markus Koschany]

Am 07.05.20 um 10:04 schrieb Michael Meier:
> Package: tomcat9
> Version: 9.0.16-4
> Severity: grave
> Justification: renders package unusable
> 
> I've just been called out of bed.
> As it seems unattended-upgrades upgraded on a debian buster server
> from:9.0.16-4 to 9.0.31-1~deb10u1
> One of the installed webapps throws following error when trying to use it:
> 
> [https-openssl-nio-8443-exec-13] ERROR org.zkoss.zk.ui.metainfo.Property -
> Failed to assign [value=${i18n:rt('Benutzername')}] to <Label fLvPc>
> Unable to find ExpressionFactory of type: # Licensed to the Apache Software
> Foundation (ASF) under one or more
> 
> Downgrading to 9.0.16-4 solves the issue.

Have you read the changelog or the Debian security announcement before
upgrading Tomcat 9 ? Does your application require the AJP protocol to
work? Then you probably need to slightly change your Tomcat
configuration. For more information please also refer to the official
documentation at

  https://tomcat.apache.org/tomcat-9.0-doc/config/ajp.html


If that does not solve your problem, then we need more information about
your setup and configuration to debug the problem but note that we ship
the latest upstream version basically unmodified, so this would be most
likely an upstream bug.

Regards,

Markus Koschany

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