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https://issues.apache.org/jira/browse/SPARK-23603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16386235#comment-16386235
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Apache Spark commented on SPARK-23603:
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User 'cxzl25' has created a pull request for this issue:
https://github.com/apache/spark/pull/20738
> When the length of the json is in a range,get_json_object will result in
> missing tail data
> ------------------------------------------------------------------------------------------
>
> Key: SPARK-23603
> URL: https://issues.apache.org/jira/browse/SPARK-23603
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.0.0, 2.2.0, 2.3.0
> Reporter: dzcxzl
> Priority: Major
>
> Jackson(>=2.7.7) fixes the possibility of missing tail data when the length
> of the value is in a range
> [https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.7.7]
> [https://github.com/FasterXML/jackson-core/issues/307]
>
> spark-shell:
>
> {code:java}
> val value = "x" * 3000
> val json = s"""{"big": "$value"}"""
> spark.sql("select length(get_json_object(\'"+json+"\','$.big'))" ).collect
> res0: Array[org.apache.spark.sql.Row] = Array([2991])
> {code}
> correct result : 3000
>
>
> There are two solutions
> One is
> bump jackson version to 2.7.7
> The other one is
> Replace writeRaw(char[] text, int offset, int len) with writeRaw(String text)
>
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