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Type:
Improvement
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 0.23.6, 2.0.4-alpha
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Fix Version/s: 2.5.0
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Component/s: None
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Labels:None
I've been occasionally coming across instances where Hadoop's Cluster Applications REST API (http://hadoop.apache.org/docs/r0.23.6/hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html#Cluster_Applications_API) has returned JSON that PHP's json_decode function failed to parse. I've tracked the syntax error down to the presence of the unquoted word NaN appearing as a value in the JSON. For example:
"progress":NaN,
NaN is not part of the JSON spec, so its presence renders the whole JSON string invalid. Hadoop needs to return something other than NaN in this case – perhaps an empty string or the quoted string "NaN".