Andrey Zagrebin created FLINK-15300:
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Summary: Shuffle memory fraction sanity check does not account for its min/max limit
Key: FLINK-15300
URL:
https://issues.apache.org/jira/browse/FLINK-15300 Project: Flink
Issue Type: Bug
Components: Runtime / Configuration
Reporter: Andrey Zagrebin
Assignee: Andrey Zagrebin
Fix For: 1.10.0
If we have a configuration which results in setting shuffle memory size to its min or max, not fraction during TM startup then starting TM parses generated dynamic properties and while doing the sanity check (TaskExecutorResourceUtils#sanityCheckShuffleMemory) it fails because it checks the exact fraction for min/max value.
Example, start TM with the following Flink config:
{code:java}
taskmanager.memory.total-flink.size: 350m
taskmanager.memory.framework.heap.size: 16m
taskmanager.memory.shuffle.fraction: 0.1{code}
It will result in the following extra program args:
{code:java}
taskmanager.memory.shuffle.max: 67108864b
taskmanager.memory.framework.off-heap.size: 134217728b
taskmanager.memory.managed.size: 146800642b
taskmanager.cpu.cores: 1.0
taskmanager.memory.task.heap.size: 2097150b
taskmanager.memory.task.off-heap.size: 0b
taskmanager.memory.shuffle.min: 67108864b{code}
where the derived fraction was less than shuffle memory min size (64mb),
so it was set to the min value: 64mb.
While TM starts, TaskExecutorResourceUtils#sanityCheckShuffleMemory trows the following exception:
{code:java}
org.apache.flink.configuration.IllegalConfigurationException: Derived Shuffle Memory size(64 Mb (67108864 bytes)) does not match configured Shuffle Memory fraction (0.10000000149011612).org.apache.flink.configuration.IllegalConfigurationException: Derived Shuffle Memory size(64 Mb (67108864 bytes)) does not match configured Shuffle Memory fraction (0.10000000149011612). at org.apache.flink.runtime.clusterframework.TaskExecutorResourceUtils.sanityCheckShuffleMemory(TaskExecutorResourceUtils.java:552) at org.apache.flink.runtime.clusterframework.TaskExecutorResourceUtils.deriveResourceSpecWithExplicitTaskAndManagedMemory(TaskExecutorResourceUtils.java:183) at org.apache.flink.runtime.clusterframework.TaskExecutorResourceUtils.resourceSpecFromConfig(TaskExecutorResourceUtils.java:135)
{code}
This can be fixed by checking whether the fraction to assert is within the min/max range.
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