J.Andreina created YARN-1184:
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Summary: ClassCastException is thrown during preemption When a
huge job is submitted to a queue B whose resources is used by a job in queueA
Key: YARN-1184
URL: https://issues.apache.org/jira/browse/YARN-1184
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.1.0-beta
Reporter: J.Andreina
preemption is enabled.
Queue = a,b
a capacity = 30%
b capacity = 70%
Step 1: Assign a big job to queue a ( so that job_a will utilize some resources
from queue b)
Step 2: Assigne a big job to queue b.
Following exception is thrown at Resource Manager
{noformat}
2013-09-12 10:42:32,535 ERROR [SchedulingMonitor
(ProportionalCapacityPreemptionPolicy)] yarn.YarnUncaughtExceptionHandler
(YarnUncaughtExceptionHandler.java:uncaughtException(68)) - Thread
Thread[SchedulingMonitor (ProportionalCapacityPreemptionPolicy),5,main] threw
an Exception.
java.lang.ClassCastException: java.util.Collections$UnmodifiableSet cannot be
cast to java.util.NavigableSet
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.getContainersToPreempt(ProportionalCapacityPreemptionPolicy.java:403)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.containerBasedPreemptOrKill(ProportionalCapacityPreemptionPolicy.java:202)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.capacity.ProportionalCapacityPreemptionPolicy.editSchedule(ProportionalCapacityPreemptionPolicy.java:173)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor.invokePolicy(SchedulingMonitor.java:72)
at
org.apache.hadoop.yarn.server.resourcemanager.monitor.SchedulingMonitor$PreemptionChecker.run(SchedulingMonitor.java:82)
at java.lang.Thread.run(Thread.java:662)
{noformat}
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