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https://issues.apache.org/jira/browse/MESOS-9889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Mahler reassigned MESOS-9889:
--------------------------------------
Assignee: Benjamin Mahler
> Master CPU high due to unexpected foreachkey behaviour in
> Master::__reregisterSlave
> -----------------------------------------------------------------------------------
>
> Key: MESOS-9889
> URL: https://issues.apache.org/jira/browse/MESOS-9889
> Project: Mesos
> Issue Type: Bug
> Reporter: haosdent
> Assignee: Benjamin Mahler
> Priority: Critical
> Labels: foundations
>
> At
> https://github.com/apache/mesos/blob/9932550e9632e7fbb9a45b217793c7f508f57001/src/master/master.cpp#L7707-L7708
> {code}
> void Master::__reregisterSlave(
> ...
> foreachkey (FrameworkID frameworkId,
> slaves.unreachableTasks.at(slaveInfo.id())) {
> ...
> foreach (TaskID taskId,
> slaves.unreachableTasks.at(slaveInfo.id()).get(frameworkId))
> {
> {code}
> Our case is when network flapping, 3~4 agents reregister, then master would
> CPU full and could not process any requests during that period.
> After change
> {code}
> - foreachkey (FrameworkID frameworkId,
> - slaves.unreachableTasks.at(slaveInfo.id())) {
> + foreach (FrameworkID frameworkId,
> + slaves.unreachableTasks.at(slaveInfo.id()).keys()) {
> {code}
> The problem gone.
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