Benjamin Teke created YARN-11014:
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Summary: YARN incorrectly validates maximum capacity resources on
the validation API
Key: YARN-11014
URL: https://issues.apache.org/jira/browse/YARN-11014
Project: Hadoop YARN
Issue Type: Bug
Reporter: Benjamin Teke
The YARN validation API
(http://<host>:8088/ws/v1/cluster/scheduler-conf/validate) allows a
configuration in which a child queue has a greater maximum capacity value than
its parent (the same update fails when it is attempted for real) using the
DominantResourceCalculator. For example, the following passes validation when
the root queue's maximum capacity is less than the 100000000 it is attempting
to set here:
{code:java}
{
"update-queue": [
{
"queue-name": "root.100593_900135",
"params": {
"entry": [
{
"key": "maximum-capacity",
"value": "[memory=100000000,vcores=3]"
},
{
"key": "capacity",
"value": "[memory=3020,vcores=1]"
}
]
}
}
]
}
{code}
The reason for this is the newly created CapacityScheduler instance doesn't
have the active nodes of the cluster in the nodeTracker object, hence the
clusterResources will be Resources.none() during the init/reinit phase of this
new instance. If the dominantRC has invalid denominator (clusterResource being
0) it simply compares the two values resource-by-resource:
{code:java}
if (isAllInvalidDivisor(clusterResource)) {
return this.compare(lhs, rhs);
}
...
/**
* Compare two resources - if the value for every resource type for the lhs
* is greater than that of the rhs, return 1. If the value for every resource
* type in the lhs is less than the rhs, return -1. Otherwise, return 0
*
* @param lhs resource to be compared
* @param rhs resource to be compared
* @return 0, 1, or -1
*/
private int compare(Resource lhs, Resource rhs) {
{code}
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