Okay, so I have finally narrowed it down the trivial failure case, and I
think I have an explanation as a result:
[1] works (in docker), and [2] fails (in docker) but works outside. The
difference between the two is the import directive being a wildcard (ugly,
but historical in our app in some places we haven't yet cleaned up).
I am therefore speculating based on the Expression Language specification
that because the class wasn't explicitly imported, it's not in the list of
available classes for static class resolution, and thus it fails.
Combine this with MacOS and Windows not caring about filename cases, and
Linux caring, then I suspect it's just matching differently in both cases.
Workaround/fix would be:
- to ensure we explicitly import the class (instead or in addition to the
wildcard)
OR
- rename the attribute so it doesn't map directly to the class name.
So I think I can bring my overly-detailed thread to an end...unless my
guess at the reasoning is incorrect and someone has a better explanation.
Thanks Rob S and Neil for having a look and providing suggestions -- in
part, it was something related to what you both said, but I believe in
different contexts than you expected.
Robert
[1]
$ cat src/main/webapp/index.jsp
<%@page contentType="text/html" pageEncoding="UTF-8" isELIgnored="false" %>
<%@page import="com.example.rt.Failing" %>
<%
final Failing failing = null;
pageContext.setAttribute("failing", failing);
%>
<html>
<body>
<h2>Hello World!</h2>
<p>field1=${failing.field1}</p>
</body>
[2]
$ cat src/main/webapp/index.jsp
<%@page contentType="text/html" pageEncoding="UTF-8" isELIgnored="false" %>
<%@page import="com.example.rt.*" %>
<%
final Failing failing = null;
pageContext.setAttribute("failing", failing);
%>
<html>
<body>
<h2>Hello World!</h2>
<p>field1=${failing.field1}</p>
</body>
On Mon, Feb 7, 2022 at 10:14 PM Robert Turner <rtur...@e-djuster.ca> wrote:
> So back to a divide and conquer approach I think.
>
> I just created a trivial "example" [1] and it works as expected (i.e. no
> exception was generated) (on the same servers I was testing the complex JAR
> file) -- so possibly something else modifying the behaviour -- a JAR on the
> classpath, or something in the JSP file...
>
> [1]
>
> $ cat src/main/webapp/index.jsp
> <%@page contentType="text/html" pageEncoding="UTF-8" isELIgnored="false" %>
> <%@page import="com.example.rt.Failing"%>
> <%
> final Failing failing = null;
> pageContext.setAttribute("failing", failing);
> %>
> <html>
> <body>
> <h2>Hello World!</h2>
>
> <p>field1=${failing.field1}</p>
> </body>
> </html>
>
> $ cat src/main/java/com/example/rt/Failing.java
> package com.example.rt;
>
> public class Failing {
>
> private final String field1 = "field1_value";
>
> public String getField1() {
> return field1;
> }
>
> }
>
>
>
> On Mon, Feb 7, 2022 at 9:51 PM Robert Turner <rtur...@e-djuster.ca> wrote:
>
>> I'm just avoiding sharing product details or things I think only serves
>> to confuse the problem. Sorry if you felt I wasn't sharing. It wasn't my
>> intention to be obtuse. I didn't believe they added any value for the
>> diagnostics (of course that assumes I know enough about the problem).
>>
>> However, since you think they might be useful, here they the name mapping
>> from the exception and the Java and JSP code excerpts:
>>
>> "package1" -> "model"
>> "Class1" -> "Organization"
>> "class1" -> "organization"
>>
>> The class is present in the package (see [1]) -- otherwise it wouldn't
>> work in one environment and not the other -- I believe I have confirmed
>> that carefully. Full class paths (with path-names relativised to compare
>> between environments) listed below [2], and the code that emitted the
>> listing is here [3]. I post-processed the log lines as follows [4]. Docker
>> file for the Tomcat container provided [5]. JDK details listed in [6].
>> Tomcat version is 9.0.58 in all cases.
>>
>> What seems to be different is:
>> - the way the EL resolver is working
>> OR
>> - the behaviour of the class loader differs in the different
>> environments.
>> OR
>> - something else I do not understand is relevant
>>
>> The working environments are MacOS and Windows, and the failing
>> environment is either Debian or AWS Linux 2 running in a docker container.
>> If the class loaders behaviour differently, then that could explain the
>> issues, however, that would surprise me if they differed in any material
>> way on the different platforms.
>>
>> I hope that helps provide more detail that might be useful...
>>
>> Robert
>>
>>
>> [1]
>> $ unzip -l target/app.war | grep "model\/Organization\.class"
>> 66246 02-07-2022 20:17 WEB-INF/classes/model/Organization.class
>>
>>
>> [2]
>> java.class.path=/bin/bootstrap.jar:/bin/tomcat-juli.jar
>> Class loader URLs:
>> Class loader name=org.apache.catalina.loader.ParallelWebappClassLoader,
>> URL count=146
>> URL=file:/WEB-INF/classes/
>> URL=file:/WEB-INF/lib/FastInfoset-1.2.18.jar
>> URL=file:/WEB-INF/lib/SparseBitSet-1.2.jar
>> URL=file:/WEB-INF/lib/VeracodeAnnotations-1.2.1.jar
>> URL=file:/WEB-INF/lib/activation-1.1.jar
>> URL=file:/WEB-INF/lib/animal-sniffer-annotations-1.20.jar
>> URL=file:/WEB-INF/lib/annotations-4.1.1.4.jar
>> URL=file:/WEB-INF/lib/api-common-2.0.1.jar
>> URL=file:/WEB-INF/lib/auto-value-annotations-1.8.2.jar
>> URL=file:/WEB-INF/lib/avatax-rest-v2-api-java_2.11-21.12.1.jar
>> URL=file:/WEB-INF/lib/aws-java-sdk-core-1.12.145.jar
>> URL=file:/WEB-INF/lib/aws-java-sdk-kms-1.12.145.jar
>> URL=file:/WEB-INF/lib/aws-java-sdk-s3-1.12.145.jar
>> URL=file:/WEB-INF/lib/bcmail-jdk15on-1.70.jar
>> URL=file:/WEB-INF/lib/bcpkix-jdk15on-1.70.jar
>> URL=file:/WEB-INF/lib/bcprov-jdk15on-1.70.jar
>> URL=file:/WEB-INF/lib/bcutil-jdk15on-1.70.jar
>> URL=file:/WEB-INF/lib/castor-core-1.4.1.jar
>> URL=file:/WEB-INF/lib/castor-xml-1.4.1.jar
>> URL=file:/WEB-INF/lib/checker-qual-3.5.0.jar
>> URL=file:/WEB-INF/lib/commons-beanutils-1.9.4.jar
>> URL=file:/WEB-INF/lib/commons-codec-1.15.jar
>> URL=file:/WEB-INF/lib/commons-collections-3.2.2.jar
>> URL=file:/WEB-INF/lib/commons-collections4-4.4.jar
>> URL=file:/WEB-INF/lib/commons-compress-1.21.jar
>> URL=file:/WEB-INF/lib/commons-digester-2.1.jar
>> URL=file:/WEB-INF/lib/commons-fileupload-1.4.jar
>> URL=file:/WEB-INF/lib/commons-io-2.11.0.jar
>> URL=file:/WEB-INF/lib/commons-lang3-3.12.0.jar
>> URL=file:/WEB-INF/lib/commons-logging-1.2.jar
>> URL=file:/WEB-INF/lib/commons-math3-3.6.1.jar
>> URL=file:/WEB-INF/lib/commons-text-1.9.jar
>> URL=file:/WEB-INF/lib/conscrypt-openjdk-uber-2.5.1.jar
>> URL=file:/WEB-INF/lib/curvesapi-1.06.jar
>> URL=file:/WEB-INF/lib/ecj-3.21.0.jar
>> URL=file:/WEB-INF/lib/encoder-1.2.3.jar
>> URL=file:/WEB-INF/lib/encoder-jsp-1.2.3.jar
>> URL=file:/WEB-INF/lib/error_prone_annotations-2.9.0.jar
>> URL=file:/WEB-INF/lib/failureaccess-1.0.1.jar
>> URL=file:/WEB-INF/lib/fontbox-2.0.25.jar
>> URL=file:/WEB-INF/lib/gax-2.3.0.jar
>> URL=file:/WEB-INF/lib/gax-grpc-2.3.0.jar
>> URL=file:/WEB-INF/lib/gmbal-api-only-4.0.3.jar
>> URL=file:/WEB-INF/lib/google-auth-library-credentials-1.1.0.jar
>> URL=file:/WEB-INF/lib/google-auth-library-oauth2-http-1.1.0.jar
>> URL=file:/WEB-INF/lib/google-cloud-speech-1.30.5.jar
>> URL=file:/WEB-INF/lib/google-http-client-1.39.2.jar
>> URL=file:/WEB-INF/lib/google-http-client-gson-1.39.2.jar
>> URL=file:/WEB-INF/lib/googleauth-1.5.0.jar
>> URL=file:/WEB-INF/lib/grpc-alts-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-api-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-auth-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-context-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-core-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-grpclb-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-netty-shaded-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-protobuf-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-protobuf-lite-1.40.0.jar
>> URL=file:/WEB-INF/lib/grpc-stub-1.40.0.jar
>> URL=file:/WEB-INF/lib/gson-2.8.9.jar
>> URL=file:/WEB-INF/lib/guava-31.0.1-jre.jar
>> URL=file:/WEB-INF/lib/ha-api-3.1.13.jar
>> URL=file:/WEB-INF/lib/handlebars-4.3.0.jar
>> URL=file:/WEB-INF/lib/httpclient-4.5.13.jar
>> URL=file:/WEB-INF/lib/httpcore-4.4.15.jar
>> URL=file:/WEB-INF/lib/ion-java-1.0.2.jar
>> URL=file:/WEB-INF/lib/ipaddress-5.3.3.jar
>> URL=file:/WEB-INF/lib/itext-2.1.7.js9.jar
>> URL=file:/WEB-INF/lib/j2objc-annotations-1.3.jar
>> URL=file:/WEB-INF/lib/jackson-annotations-2.13.1.jar
>> URL=file:/WEB-INF/lib/jackson-core-2.13.1.jar
>> URL=file:/WEB-INF/lib/jackson-databind-2.13.1.jar
>> URL=file:/WEB-INF/lib/jackson-dataformat-cbor-2.13.1.jar
>> URL=file:/WEB-INF/lib/jai-imageio-core-1.4.0.jar
>> URL=file:/WEB-INF/lib/jakarta.activation-2.0.1.jar
>> URL=file:/WEB-INF/lib/jakarta.annotation-api-1.3.5.jar
>> URL=file:/WEB-INF/lib/jakarta.jws-api-2.1.0.jar
>> URL=file:/WEB-INF/lib/jakarta.mail-1.6.7.jar
>> URL=file:/WEB-INF/lib/jakarta.xml.bind-api-2.3.3.jar
>> URL=file:/WEB-INF/lib/jakarta.xml.soap-api-1.4.2.jar
>> URL=file:/WEB-INF/lib/jakarta.xml.ws-api-2.3.3.jar
>> URL=file:/WEB-INF/lib/jasperreports-6.18.1.jar
>> URL=file:/WEB-INF/lib/jasperreports-fonts-6.18.1.jar
>> URL=file:/WEB-INF/lib/java-saml-2.8.0.jar
>> URL=file:/WEB-INF/lib/java-saml-core-2.8.0.jar
>> URL=file:/WEB-INF/lib/javax.activation-api-1.2.0.jar
>> URL=file:/WEB-INF/lib/javax.annotation-api-1.3.2.jar
>> URL=file:/WEB-INF/lib/javax.inject-1.jar
>> URL=file:/WEB-INF/lib/javax.mail-1.6.2.jar
>> URL=file:/WEB-INF/lib/javax.xml.soap-api-1.4.0.jar
>> URL=file:/WEB-INF/lib/jaxb-api-2.3.1.jar
>> URL=file:/WEB-INF/lib/jaxb-core-2.3.0.1.jar
>> URL=file:/WEB-INF/lib/jaxb-impl-2.3.5.jar
>> URL=file:/WEB-INF/lib/jaxws-api-2.3.1.jar
>> URL=file:/WEB-INF/lib/jaxws-rt-2.3.5.jar
>> URL=file:/WEB-INF/lib/jbig2-imageio-3.0.3.jar
>> URL=file:/WEB-INF/lib/jcommon-1.0.24.jar
>> URL=file:/WEB-INF/lib/jempbox-1.8.16.jar
>> URL=file:/WEB-INF/lib/jettison-1.4.1.jar
>> URL=file:/WEB-INF/lib/jfreechart-1.0.19.jar
>> URL=file:/WEB-INF/lib/jmespath-java-1.12.145.jar
>> URL=file:/WEB-INF/lib/joda-time-2.10.6.jar
>> URL=file:/WEB-INF/lib/jsch-0.1.55.jar
>> URL=file:/WEB-INF/lib/jsoup-1.14.3.jar
>> URL=file:/WEB-INF/lib/jsr181-api-1.0-MR1.jar
>> URL=file:/WEB-INF/lib/jsr305-3.0.2.jar
>>
>> URL=file:/WEB-INF/lib/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar
>> URL=file:/WEB-INF/lib/log4j-api-2.17.1.jar
>> URL=file:/WEB-INF/lib/log4j-core-2.17.1.jar
>> URL=file:/WEB-INF/lib/log4j-slf4j-impl-2.17.1.jar
>> URL=file:/WEB-INF/lib/log4j-web-2.17.1.jar
>> URL=file:/WEB-INF/lib/management-api-3.2.3.jar
>> URL=file:/WEB-INF/lib/metadata-extractor-2.16.0.jar
>> URL=file:/WEB-INF/lib/mimepull-1.9.15.jar
>> URL=file:/WEB-INF/lib/opencensus-api-0.28.0.jar
>> URL=file:/WEB-INF/lib/opencensus-contrib-http-util-0.28.0.jar
>> URL=file:/WEB-INF/lib/owasp-java-html-sanitizer-20211018.2.jar
>> URL=file:/WEB-INF/lib/pdfbox-2.0.25.jar
>> URL=file:/WEB-INF/lib/perfmark-api-0.23.0.jar
>> URL=file:/WEB-INF/lib/poi-4.1.2.jar
>> URL=file:/WEB-INF/lib/poi-ooxml-4.1.2.jar
>> URL=file:/WEB-INF/lib/poi-ooxml-schemas-4.1.2.jar
>> URL=file:/WEB-INF/lib/policy-2.7.10.jar
>> URL=file:/WEB-INF/lib/postgresql-42.3.1.jar
>> URL=file:/WEB-INF/lib/proto-google-cloud-speech-v1-1.30.5.jar
>> URL=file:/WEB-INF/lib/proto-google-cloud-speech-v1p1beta1-0.83.5.jar
>> URL=file:/WEB-INF/lib/proto-google-common-protos-2.3.2.jar
>> URL=file:/WEB-INF/lib/protobuf-java-3.17.3.jar
>> URL=file:/WEB-INF/lib/protobuf-java-util-3.17.3.jar
>> URL=file:/WEB-INF/lib/saaj-impl-1.5.3.jar
>> URL=file:/WEB-INF/lib/scala-library-2.11.12.jar
>> URL=file:/WEB-INF/lib/slf4j-api-1.7.33.jar
>> URL=file:/WEB-INF/lib/stax-api-1.0.1.jar
>> URL=file:/WEB-INF/lib/stax-ex-1.8.3.jar
>> URL=file:/WEB-INF/lib/stax2-api-4.2.1.jar
>> URL=file:/WEB-INF/lib/streambuffer-2.0.2.jar
>> URL=file:/WEB-INF/lib/taglibs-standard-impl-1.2.5.jar
>> URL=file:/WEB-INF/lib/taglibs-standard-spec-1.2.5.jar
>> URL=file:/WEB-INF/lib/threetenbp-1.3.5.jar
>> URL=file:/WEB-INF/lib/tika-core-2.2.1.jar
>> URL=file:/WEB-INF/lib/tika-parser-image-module-2.2.1.jar
>> URL=file:/WEB-INF/lib/tika-parser-xmp-commons-2.2.1.jar
>> URL=file:/WEB-INF/lib/woodstox-core-6.2.6.jar
>> URL=file:/WEB-INF/lib/xmlbeans-3.1.0.jar
>> URL=file:/WEB-INF/lib/xmlsec-2.2.3.jar
>> URL=file:/WEB-INF/lib/xmpcore-6.1.11.jar
>> Class loader name=java.net.URLClassLoader, URL count=33
>> URL=file:/lib/
>> URL=file:/lib/annotations-api.jar
>> URL=file:/lib/catalina-ant.jar
>> URL=file:/lib/catalina-ha.jar
>> URL=file:/lib/catalina-ssi.jar
>> URL=file:/lib/catalina-storeconfig.jar
>> URL=file:/lib/catalina-tribes.jar
>> URL=file:/lib/catalina.jar
>> URL=file:/lib/ecj-4.20.jar
>> URL=file:/lib/el-api.jar
>> URL=file:/lib/jasper-el.jar
>> URL=file:/lib/jasper.jar
>> URL=file:/lib/jaspic-api.jar
>> URL=file:/lib/jsp-api.jar
>> URL=file:/lib/servlet-api.jar
>> URL=file:/lib/tomcat-api.jar
>> URL=file:/lib/tomcat-coyote.jar
>> URL=file:/lib/tomcat-dbcp.jar
>> URL=file:/lib/tomcat-i18n-cs.jar
>> URL=file:/lib/tomcat-i18n-de.jar
>> URL=file:/lib/tomcat-i18n-es.jar
>> URL=file:/lib/tomcat-i18n-fr.jar
>> URL=file:/lib/tomcat-i18n-ja.jar
>> URL=file:/lib/tomcat-i18n-ko.jar
>> URL=file:/lib/tomcat-i18n-pt-BR.jar
>> URL=file:/lib/tomcat-i18n-ru.jar
>> URL=file:/lib/tomcat-i18n-zh-CN.jar
>> URL=file:/lib/tomcat-jdbc.jar
>> URL=file:/lib/tomcat-jni.jar
>> URL=file:/lib/tomcat-util-scan.jar
>> URL=file:/lib/tomcat-util.jar
>> URL=file:/lib/tomcat-websocket.jar
>> URL=file:/lib/websocket-api.jar
>> Class loader name=jdk.internal.loader.ClassLoaders$AppClassLoader
>> Class loader name=jdk.internal.loader.ClassLoaders$PlatformClassLoader
>>
>>
>> [3]
>> private static void logClassLoaderUrls(org.apache.logging.log4j.Level
>> logLevel, ClassLoader cl) {
>> if (null == cl) {
>> return;
>> }
>> boolean loaderNameLogged = false;
>> if (cl instanceof URLClassLoader) {
>> final URLClassLoader urlCl = (URLClassLoader) cl;
>> final URL[] urls = urlCl.getURLs();
>> if (null != urls) {
>> LOG.log(logLevel, " Class loader name={}, URL count={}",
>> cl.getClass().getName(), urls.length);
>> loaderNameLogged = true;
>> for (int idx = 0; idx < urls.length; idx++) {
>> final URL url = urls[idx];
>> LOG.log(logLevel, " URL[{}]={}", idx, url);
>> }
>> }
>> }
>> if (!loaderNameLogged) {
>> LOG.log(logLevel, " Class loader name={}",
>> cl.getClass().getName());
>> }
>> logClassLoaderUrls(logLevel, cl.getParent());
>> }
>>
>> ..snip..
>>
>> LOG.info("java.class.path={}",
>> System.getProperty("java.class.path"));
>> LOG.debug("Class loader URLs:");
>> logClassLoaderUrls(org.apache.logging.log4j.Level.DEBUG,
>> ctx.getClassLoader());
>>
>>
>> [4]
>> cat log-extract.txt | cut -c137- | sed -e "s+/usr/local/tomcat++g" -e
>> "s+/usr/local/tomcat/webapps/exclaim++g" -e "s+\[[0-9]*\]++"
>> and I manually sorted the "sections" using vim, with the "sort" command.
>>
>>
>> [5]
>> # Debian with OpenJDK
>> #FROM tomcat:9.0.58-jre11-openjdk AS tomcat_package
>> # AWS Linux 2 with Corretto
>> FROM tomcat:9.0.58-jdk11-corretto AS tomcat_package
>>
>> # Set the timezone to Canada/Eastern
>> # For Debian
>> #RUN ln -sf /usr/share/zoneinfo/Canada/Eastern /etc/localtime && echo
>> "Canada/Eastern" > /etc/timezone && dpkg-reconfigure -f noninteractive
>> tzdata
>> # For AWS Linux
>> RUN ln -sf /usr/share/zoneinfo/Canada/Eastern /etc/localtime && sed -i
>> 's/\"UTC\"/\"Canada\/Eastern\"/' /etc/sysconfig/clock # and reboot, but
>> will skip as container will be created and ran separately
>>
>> # Install a postgresql client for testing and the required font packages
>> needed by JasperReports
>> # For Debian:
>> #RUN echo "deb http://deb.debian.org/debian bullseye contrib non-free"
>> >> /etc/apt/sources.list && apt-get update && apt-get install -y
>> postgresql-client ttf-mscorefonts-installer
>> # For AWS Linux:
>> RUN yum -q list installed epel-release.noarch &>/dev/null && echo
>> 'epel-release already installed' || yum install -y
>> https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
>> RUN yum install -y cabextract xorg-x11-font-utils fontconfig
>> RUN rpm -q msttcore-fonts-installer-2.6-1 &>/dev/null && echo
>> 'msttcore-fonts-installer-2.6-1 already installed' || rpm -i
>> https://iweb.dl.sourceforge.net/project/mscorefonts2/rpms/msttcore-fonts-installer-2.6-1.noarch.rpm
>>
>> # Add a health-check script to wait for exclaim to be running -- allow at
>> least 10 minutes for it to start
>> COPY health_check.sh /usr/local/bin/
>> HEALTHCHECK --interval=10s --timeout=5s --start-period=10m --retries=10
>> CMD /usr/local/bin/health_check.sh
>>
>> # Set up the resource folders needed by application and make it a
>> # volume so it persists across container restarts
>> COPY resources/ /resources/
>> VOLUME /resources
>>
>> # Map some of the Tomcat folders to volumes so they persist between
>> restarts of the container
>> VOLUME /usr/local/tomcat/logs
>> VOLUME /usr/local/tomcat/webapps
>> VOLUME /usr/local/tomcat/work
>> VOLUME /usr/local/tomcat/conf
>>
>> # Enable connecting from anywhere for JPDA (req'd for Java 9+)
>> ENV JPDA_ADDRESS=*:8000
>>
>> CMD ["catalina.sh","jpda","run"]
>>
>>
>> [6]
>> JDK on MacOS is:
>> openjdk version "11.0.13" 2021-10-19 LTS
>> OpenJDK Runtime Environment Corretto-11.0.13.8.1 (build 11.0.13+8-LTS)
>> OpenJDK 64-Bit Server VM Corretto-11.0.13.8.1 (build 11.0.13+8-LTS, mixed
>> mode)
>>
>> JDK on Windows is:
>> openjdk 11.0.14 2022-01-18 LTS
>> OpenJDK Runtime Environment Corretto-11.0.14.9.1 (build 11.0.14+9-LTS)
>> OpenJDK 64-Bit Server VM Corretto-11.0.14.9.1 (build 11.0.14+9-LTS, mixed
>> mode)
>>
>> JDK on Docker with AWS Linux 2 is:
>> openjdk 11.0.14 2022-01-18 LTS
>> OpenJDK Runtime Environment Corretto-11.0.14.9.1 (build 11.0.14+9-LTS)
>> OpenJDK 64-Bit Server VM Corretto-11.0.14.9.1 (build 11.0.14+9-LTS, mixed
>> mode)
>>
>>
>>
>> On Mon, Feb 7, 2022 at 9:24 PM Rob Sargent <rsarg...@xmission.com> wrote:
>>
>>>
>>>
>>> On 2/7/22 19:13, Robert Turner wrote:
>>> > So, I've gone back and double-checked as much as I can (Tomcat
>>> version, JDK
>>> > version), and the classpath, and I have identical classpaths in both
>>> > environments (except the sort order of the URLs per "level" of
>>> > ClassLoader), and I've re-verified the behaviour:
>>> > - fails in the docker environment
>>> > - works locally
>>> > (Same WAR file on both).
>>> >
>>> > I guess I'm in to one of the following approaches next:
>>> > - build a debug version of Tomcat, and step through the code that
>>> breaks
>>> > and see if I can figure out why (not that I have time to do this of
>>> > course...but might be necessary)
>>> > - construct a trivial application reproduction, along with docker
>>> layout,
>>> > and see if anyone else can reproduce... (assuming anyone else has time
>>> to
>>> > do that of course...)
>>> >
>>> > Anyone got any suggestions of what to look into next?
>>> >
>>> >
>>> > On Mon, Feb 7, 2022 at 5:05 PM Rob Sargent <rsarg...@xmission.com>
>>> wrote:
>>> >
>>> >
>>> As you appear averse to sharing names of things, seems you will need to
>>> do a lot of extra clean-up before you can share a docker image. Make
>>> sure you're clear on what NoClassDefFoundError indicates (present at
>>> compile time, absent at runtime) and how that translates to docker-ness
>>> (of which I know naught).
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
>>> For additional commands, e-mail: users-h...@tomcat.apache.org
>>>
>>>
