Why flink container vcore size is always 1

Question

I am running flink on yarn(more precisely in AWS EMR yarn cluster).

I read flink document and source code that by default for each task manager container, flink will

Answer 1

@yinhua.

Use the command to start a session:./bin/yarn-session.sh， you need add -s arg.

-s,--slots Number of slots per TaskManager

details:

1. https://ci.apache.org/projects/flink/flink-docs-release-1.4/ops/deployment/yarn_setup.html
2. https://ci.apache.org/projects/flink/flink-docs-release-1.4/ops/cli.html#usage