Wangda Tan created YARN-2124:
--------------------------------
Summary: ProportionalCapacityPreemptionPolicy cannot work because
it's initialized before scheduler initialized
Key: YARN-2124
URL: https://issues.apache.org/jira/browse/YARN-2124
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager, scheduler
Affects Versions: 3.0.0
Reporter: Wangda Tan
Assignee: Wangda Tan
Priority: Critical
When I play with scheduler with preemption, I found
ProportionalCapacityPreemptionPolicy cannot work. NPE will be raised when RM
start
{code}
2014-06-05 11:01:33,201 ERROR
org.apache.hadoop.yarn.YarnUncaughtExceptionHandler: Thread
Thread[SchedulingMonitor (ProportionalCapacityPreemptionPolicy),5,main] threw
an Exception.
java.lang.NullPointerException
at
org.apache.hadoop.yarn.util.resource.Resources.greaterThan(Resources.java:225)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.computeIdealResourceDistribution(ProportionalCapacityPreemptionPolicy.java:302)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.recursivelyComputeIdealAssignment(ProportionalCapacityPreemptionPolicy.java:261)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.containerBasedPreemptOrKill(ProportionalCapacityPreemptionPolicy.java:198)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.editSchedule(ProportionalCapacityPreemptionPolicy.java:174)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor.invokePolicy(SchedulingMonitor.java:72)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor$PreemptionChecker.run(SchedulingMonitor.java:82)
at java.lang.Thread.run(Thread.java:744)
{code}
This is caused by ProportionalCapacityPreemptionPolicy needs ResourceCalculator
from CapacityScheduler. But ProportionalCapacityPreemptionPolicy get
initialized before CapacityScheduler initialized. So ResourceCalculator will
set to null in ProportionalCapacityPreemptionPolicy.
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