I had the same issue and I tried to fix it by updating nodejs and npm version(but I still had build issues).
@paddy-hack I feel your solution is better then mine. After I apply your patch locally, I still have the following errors. How about you?

(1) about build error

By launch.sh, I got the following error.

$ bash launch.sh

// snip
[ERROR] Failed to execute goal org.jacoco:jacoco-maven-plugin:0.7.9:check (default-check) on project knowledge: Coverage checks have not been met. See log for details. -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.jacoco:jacoco-maven-plugin:0.7.9:check (default-check) on project knowledge: Coverage checks have not been met. See log for details.

// snip
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test (default-test) on project knowledge: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test failed: The forked VM terminated without saying properly goodbye. VM crash or System.exit called ? -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test (default-test) on project knowledge: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test failed: The forked VM terminated without saying properly goodbye. VM crash or System.exit called ?
// snip stacks
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test failed: The forked VM terminated without saying properly goodbye. VM crash or System.exit called ?

(2) war build error

After sh launch.sh, I got the following log.
I want to note that the original message is not in English so I manually translate the messages.

mkdir: can not create directory `target/webapps': no permission
mv: cannot stat 'target/knowledge.war': no such file or directory.
(snip)
tomcat_1         | 02-Feb-2021 13:13:34.147 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]
tomcat_1         | 02-Feb-2021 13:13:34.169 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
tomcat_1         | 02-Feb-2021 13:13:34.173 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 117 ms

It looks I could not build knowledge.war properly. In fact, /usr/local/tomcat/webapps in the container is empty.
How about you?

Here is my environment.

• ubuntu 18.04 x86_64
• Docker version 19.03.6, build 369ce74a3c
• ufw disabled

I remember seeing the mkdir permission issue.

It happens when you run ./launch.sh are a regular user, i.e. not root, that is part of the docker group. In that case, you can run any docker and docker-compose commands as yourself. However, inside the container, the root user is doing the build and (re)creates the target/ directory. This means that a regular user will not be able to create a target/webapps/ directory.

This will probably not happen for people who use Docker on the Mac or Windows as that runs inside a VM with root privileges, IIRC.

I "solved" it by prefixing the mkdir command and the next command with

docker-compose run --rm maven

Ugly, but it does the trick. Perhaps I should create a separate PR for that as well.
Wondering whether it makes sense to put all the build stuff in a separate script and run that under a single docker-compose run --rm maven instead of doing that docker-compose invocation four times 🤔

I also remember seeing the goal execution errors you mentioned first. However, I do not see them with the PRs I submitted.

Have you uncommented the

docker-compose run --rm maven mv clean test site -e

line by any chance?

@paddy-hack Thank you for advices and sorry for late reply.
I could build knowledge.war and deploy it successfully with some more changes.
Thank you very much! I write details below.

I remember seeing the mkdir permission issue.

Exactly! I use a regular user belong to docker group on ubuntu 19.10.
As a work around, I add sudo to mkdir and mv(see launch.sh below)

Have you uncommented the
docker-compose run --rm maven mv clean test site -e
line by any chance?

No. I kept this line commented as in https://github.com/support-project/knowledge/blob/v1/launch.sh#L4.

I found (1) error happends at docker-compose run maven mvn install -DskipTests=true -Dmaven.javadoc.skip=true -e.

I also found knowledge.war was created in spite of error (1).
But docker-compose run maven mvn clean package -e looks to remove the war file.
Thus the mv failed and target/webapps is empty.

I finally changed launch.sh as the following.

#!/bin/bash -eu

docker-compose run maven mvn install -DskipTests=true -Dmaven.javadoc.skip=true -e
# docker-compose run maven mvn clean test site -e
# docker-compose run maven mvn clean package -e

sudo mkdir -p target/webapps
sudo cp target/knowledge.war target/webapps/knowledge.war

docker-compose up --build -d tomcat
docker-compose logs -f tomcat

After ./launch.sh, I could see http://<host-ip-addr>:8080/knowledge.
Note: I changed ROOT.war by knowledge.war because of the following error.

tomcat_1         | 13-Feb-2021 09:14:30.812 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive [/usr/local/tomcat/webapps /ROOT.war]
tomcat_1         | 13-Feb-2021 09:14:30.859 SEVERE [localhost-startStop-1] org.apache.catalina.startup.ContextConfig.beforeStart Exception fixing docBase for context []

I feel this is not the right way, but it's OK if I can start what I want 😅

Wondering whether it makes sense to put all the build stuff in a separate script and run that under a single docker-compose run --rm maven instead of doing that docker-compose invocation four times

I agree. I feel we could use docker multi stage build for example. Also, I want the developer manual...