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Posted to issues@flink.apache.org by "Nico Kruber (JIRA)" <ji...@apache.org> on 2017/08/09 14:08:00 UTC
[jira] [Created] (FLINK-7401)
EnvironmentInformation.getMaxJvmHeapMemory does not return the value given
via -Xmx
Nico Kruber created FLINK-7401:
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Summary: EnvironmentInformation.getMaxJvmHeapMemory does not return the value given via -Xmx
Key: FLINK-7401
URL: https://issues.apache.org/jira/browse/FLINK-7401
Project: Flink
Issue Type: Bug
Components: Local Runtime
Affects Versions: 1.3.2, 1.3.1, 1.2.1, 1.3.0, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.2.0, 1.1.0, 1.4.0
Reporter: Nico Kruber
Assignee: Nico Kruber
{{EnvironmentInformation.getMaxJvmHeapMemory}} is intended to return the value given to the JVM via {{-Xmx}} but it actually returns something a bit smaller which may disturb memory calculations expecting the right value.
For now, this is a "good" bug as the calculations inside {{TaskManagerServices#calculateNetworkBufferMemory()}}, for example, lead to lower values for the network buffers or the manages memory fractions which thus still fit into the bounds set by the JVM options.
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