[BUG] Maven build fails because Testcontainers encounters a MalformedChunkCodingException when communicating with the Docker runtime

[casper-lans]

When running mvn clean install the build fails. The issue seems to be connected with Testcontainers and Rancher Desktop, see testcontainers/testcontainers-java#11482.

The relevant log entry seems to be:

2026-06-30 16:04:31,022 DEBUG [org.testcontainers.dockerclient.DockerClientProviderStrategy] (build-2) NpipeSocketClientProviderStrategy: failed with exception RuntimeException (com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.MalformedChunkCodingException: Bad chunk header: ). Root cause MalformedChunkCodingException (Bad chunk header: )                                                       

[casper-lans]

This workaround also works for me:

I had the same issue and what worked for me was to add the following to the environment variables:
DOCKER_HOST=npipe:////./pipe/docker_engine