Stephan Ewen created FLINK-4696:
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Summary: Limit the number of Akka Dispatcher Threads in
LocalMiniCluster
Key: FLINK-4696
URL: https://issues.apache.org/jira/browse/FLINK-4696
Project: Flink
Issue Type: Bug
Components: Distributed Coordination
Affects Versions: 1.2.0
Reporter: Stephan Ewen
Assignee: Stephan Ewen
Fix For: 1.2.0
By default, akka spawns 2x or 3x the number of cores in threads.
For the LocalFlinkMiniCluster, running on Travis (often 64 cores), with
separate actor systems for jobmanager and multiple taskmanagers, this frequetly
means >600 akka threads. Flink uses about 4 actors.
This simply eats unnecessary resources. I suggest to have at most 4 threads per
actor system in test setups.
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