faaronzheng commented on issue #10073: [FLINK-14560] [runtime] The value of taskmanager.memory.size in flink-conf.yaml is set to zero will cause taskmanager not to work URL: https://github.com/apache/flink/pull/10073#issuecomment-549206556 > Thanks for opening this PR @faaronzheng. It took me a while to understand the underlying problem. Instead of defining `0` to be the "take the fraction" value, I would suggest to remove the default value from `LEGACY_MANAGED_MEMORY_SIZE`. If the user should set this value to `0`, then it should fail as it represents an invalid system configuration. LEGACY_MANAGED_MEMORY_SIZE is already removed the default value, I think it is okay to remove the default value from MANAGED_MEMORY_SIZE in release-1.9 and branch
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