Null Pointer Exception when scheduling a report using REST_V2 jobs api

Problem Description:

You may be getting the following NPE when scheduling a job on v7.9.0 using REST_V2 API with XML body.  This job used to work on v6.4.2

PUT http://<host>:<port>/jasperserver[-pro]/rest_v2/jobs/

<?xml version="1.0" encoding="UTF-8" ?>
<job>
    <baseOutputFilename>ABC</baseOutputFilename>
    <repositoryDestination>
        <folderURI>/public</folderURI>
        <outputDescription>abc</outputDescription>
        <overwriteFiles>true</overwriteFiles>
        <sequentialFilenames>true</sequentialFilenames>
        <saveToRepository>true</saveToRepository>
        <usingDefaultReportOutputFolderURI>true</usingDefaultReportOutputFolderURI>
        <outputLocalFolder>/public</outputLocalFolder>
    </repositoryDestination>
    <description>aaa</description>
    <label>TEST REPORT</label>
    <outputFormats>
        <outputFormat>PDF</outputFormat>
    </outputFormats>
    <source>
        <parameters>
            <parameterValues>
                <entry>
                    <key>user_id</key>
                    <value xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xsi:type="xs:int">123</value>
                </entry>
                <entry>
                    <key>report_home</key>
                    <value xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xsi:type="xs:string">home001</value>
                </entry>
                <entry>
                    <key>reportdate</key>
                    <value xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xsi:type="xs:date">2021-09-11</value>
                </entry>
            </parameterValues>
        </parameters>
        <reportUnitURI>/public/abc</reportUnitURI>
    </source>
    <simpleTrigger>
        <startType>1</startType>
        <occurrenceCount>5</occurrenceCount>
        <version>0</version>
        <recurrenceInterval>1</recurrenceInterval>
        <recurrenceIntervalUnit>MINUTE</recurrenceIntervalUnit>
    </simpleTrigger>
    <version>1</version>
</job>

Solution:

Note the xsi:type of date.

 <entry>
  <key>reportdate</key>
  <value xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xsi:type="xs:date">2021-09-11</value>
 </entry>

For v7.9.0, always use collection/string for any parameter datatype.  For example,