Tamas Domok created YARN-11514:
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Summary: Extend SchedulerResponse with capacityVector
Key: YARN-11514
URL: https://issues.apache.org/jira/browse/YARN-11514
Project: Hadoop YARN
Issue Type: Sub-task
Reporter: Tamas Domok
The goal is to add the *capacityVector* to the Scheduler response (XML/JSON).
- CapacitySchedulerQueueInfo.java
- PartitionQueueCapacitiesInfo.java
The proposed format in the design doc (YARN-10888):
{code:json}
{
"capacityVector": {
"memory-mb": "30%",
"vcores": "16"
}
}
{code}
{code:xml}
<?xml version="1.0" encoding="UTF-8" ?>
<capacityVector>
<memory-mb>30%</memory-mb>
<vcores>16</vcores>
</capacityVector>
{code}
Unfortunately the current jsonProvider (MoxyJsonFeature or JettisonFeature not
sure) serialise map structures in the following way:
{code:json}
{
"capacityVector":{
"entry":[
{
"key":"memory-mb",
"value":"12288"
},
{
"key":"vcores",
"value":"86%"
}
]
}
}
{code}
{code:xml}
<?xml version="1.0" encoding="UTF-8"?>
<capacityVector>
<entry>
<key>memory-mb</key>
<value>1288</value>
</entry>
<entry>
<key>vcores</key>
<value>12</value>
</entry>
</capacityVector>
{code}
Based on some research with the following two dependencies we could achieve the
proposed format:
- jersey-media-json-jackson (this one is used in the apps catalog already)
- jackson-dataformat-xml
Some concerns:
- 2 more dependencies
- for the XML when the content depends on the runtime content of the map is
not XSD friendly
- name is capacityVector but it's represented in a map
An alternative could be to just store the capacityVector as a string, but then
clients needs to parse it, and it's not particularly nice either:
{code:json}
{
"capacityVector": "[\"memory-mb\": 12288, \"vcores\": 86%]"
}
{code}
{code:xml}
<?xml version="1.0" encoding="UTF-8" ?>
<capacityVector>["memory-mb": 12288, "vcores":
86%]</capacityVector>
{code}
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