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Yun Gao closed FLINK-28240. --------------------------- Fix Version/s: 1.16.0 1.15.2 Assignee: Gen Luo Resolution: Fixed > NettyShuffleMetricFactory#RequestedMemoryUsageMetric#getValue may throw > ArithmeticException when the total segments of NetworkBufferPool is 0 > --------------------------------------------------------------------------------------------------------------------------------------------- > > Key: FLINK-28240 > URL: https://issues.apache.org/jira/browse/FLINK-28240 > Project: Flink > Issue Type: Bug > Components: Runtime / Network > Affects Versions: 1.15.0 > Reporter: Gen Luo > Assignee: Gen Luo > Priority: Major > Labels: pull-request-available > Fix For: 1.16.0, 1.15.2 > > > In a single vertex job, the network memory can be set to 0 since the job > doesn't need it, and in this case the totalNumberOfMemorySegments of the > NetworkBufferPool will also be 0. > While the NettyShuffleMetricFactory#RequestedMemoryUsageMetric#getValue uses > the totalNumberOfMemorySegments of NetworkBufferPool as divisor without > validating, so an ArithmeticException will be thrown when the > totalNumberOfMemorySegments is 0. > Since 0 network memory is in fact valid for a single vertex job, I suppose > the RequestedMemoryUsageMetric#getValue should check if the devisor is 0, and > return 0 as the usage directly in such cases. -- This message was sent by Atlassian Jira (v8.20.10#820010)