Hi, I ran into an issue yesterday and I’m not sure how much of a Docker or Compose issue it is, or if it was just me that shot myself in the foot. My RabbitMQ container name had underscore in it and the Java application trying to connect to it was setting up the connection factory by passing it a …

Hi, Actually, I’m having the (almost) same issue with Spark (while running github.com/Logimethods/docker-nats-connector-spark/blob/underscore/compose/docker-compose.yml ) : org.apache.spark.SparkException: Job aborted due to stage failure: Task creation failed: java.lang.IllegalArgumentException: …

Update: I did try to run the same Spark Streaming code not as a Java Application, but from Spark Shell (running on a dedicated container), with the same outcome (Illegal executor location format: executor_spark-slave2.compose_default_0)…

I’m experiencing the same problems. I use docker-compose on docker swarm with overlay network and try to communicate between the containers. Swarm auto-creates hostnames according to the scheme direcrory_container_number eg. test_haproxy_1 which resolve well. But lots of tools complain about the use…

While Docker/Compose can’t do anything about people like me putting underscores in their container names, I think all tools (Compose, Swarm, etc.) should avoid underscores as much as possible. No?

Underscore in domain names

Docker Engine Compose

lmagnin (Laurent Magnin) July 21, 2016, 6:22pm 6

FYI, the Switch to using hyphens as a separator in hostnames #229 issue is still under discussion…

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Underscore in domain names

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