Why do I get "unzip: short read" when I try to build an image from Dockerfile?

Question

From Spring Microservices in Action book: I am trying to use the Docker Maven Plugin to build a docker image for deploy a Java microservice as Docker container to the cloud.

Dockerfile:

FROM openjdk:8-jdk-alpine
RUN mkdir -p /usr/local/configserver
ADD jce_policy-8.zip /tmp/
RUN unzip /tmp/jce_policy-8.zip && \
    rm /tmp/jce_policy-8.zip && \
    yes | cp -v /tmp/UnlimitedJCEPolicyJDK8/*.jar /usr/lib/jvm/java-1.8-openjdk/jre/lib/security/
ADD @[email protected] /usr/local/configserver/
ADD run.sh run.sh
RUN chmod +x run.sh
CMD ./run.sh

Output related to step 4 in Dockerfile:

...

---> Using cache
---> dd33d4c12d29
Step 4/8 : RUN unzip /tmp/jce_policy-8.zip && rm /tmp/jce_policy-8.zip && yes | cp -v /tmp/UnlimitedJCEPolicyJDK8/*.jar /usr/lib/jvm/java-1.8-openjdk/jre/lib/security/

---> Running in 1071273ceee5
Archive:  /tmp/jce_policy-8.zip
unzip: short read

Why do I get unzip: short read when I try to build the image?

Answer 1

Maybe it is related to the fact that the unzip command in alpine is provided busybox and not the standard unzip tool.

Busybox do have bugs related to this error: https://bugs.busybox.net/show_bug.cgi?id=8821

Here is a related issue with more details: https://github.com/wahern/luaossl/issues/103

As a workaround installing the standard unzip command should work.