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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-18075] Behavior of Mongo update is different in 2.4 vs 2.6</title>
                <link>https://jira.mongodb.org/browse/SERVER-18075</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Behavior of Mongo update is different in 2.4 vs 2.6.&lt;/p&gt;

&lt;p&gt;In our case _id was null so in 2.4 it was creating multiple document and which was correct behavior. in 2.6 the behavior changed and the Id is becoming null which is creating nullpointer exception and later all upsert are only updating that document instead of inserting.&lt;/p&gt;

&lt;p&gt;Steps to Reproduce&lt;br/&gt;
------------------------------------&lt;br/&gt;
try to run following in 2.4 vs 2.6 and see the difference. This is creating issue in our code due to upgrade.&lt;/p&gt;

&lt;p&gt;db.books.update(&lt;br/&gt;
   {_id:1234},&lt;br/&gt;
   {&lt;br/&gt;
     item: &quot;XYZ123&quot;,&lt;br/&gt;
     stock: 10,&lt;br/&gt;
     info: &lt;/p&gt;
{ publisher: &quot;2255&quot;, pages: 150 }
&lt;p&gt;,&lt;br/&gt;
     tags: [ &quot;baking&quot;, &quot;cooking&quot; ]&lt;br/&gt;
   },&lt;/p&gt;
   { upsert: true, multi: false}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;In 2.4 if the document is missing then it is creating the following document.&lt;br/&gt;
---------------------------------------&lt;br/&gt;
{&lt;br/&gt;
  &quot;_id&quot; : ObjectId(&quot;552eb41bb0af794da9287199&quot;),&lt;br/&gt;
  &quot;item&quot; : &quot;XYZ123&quot;,&lt;br/&gt;
  &quot;stock&quot; : 10.0,&lt;br/&gt;
  &quot;info&quot; : &lt;/p&gt;
{
    &quot;publisher&quot; : &quot;2255&quot;,
    &quot;pages&quot; : 150.0
  }
&lt;p&gt;,&lt;br/&gt;
  &quot;tags&quot; : &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;baking&amp;quot;, &amp;quot;cooking&amp;quot;&amp;#93;&lt;/span&gt;&lt;br/&gt;
}&lt;/p&gt;

&lt;p&gt;In 2.6 it is creating the following in same condition&lt;br/&gt;
----------------------------------------------------------------&lt;br/&gt;
{&lt;br/&gt;
  &quot;_id&quot; : 1234.0,&lt;br/&gt;
  &quot;item&quot; : &quot;XYZ123&quot;,&lt;br/&gt;
  &quot;stock&quot; : 10.0,&lt;br/&gt;
  &quot;info&quot; : &lt;/p&gt;
{
    &quot;publisher&quot; : &quot;2255&quot;,
    &quot;pages&quot; : 150.0
  }
&lt;p&gt;,&lt;br/&gt;
  &quot;tags&quot; : &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;baking&amp;quot;, &amp;quot;cooking&amp;quot;&amp;#93;&lt;/span&gt;&lt;br/&gt;
}&lt;/p&gt;

</description>
                <environment></environment>
        <key id="196273">SERVER-18075</key>
            <summary>Behavior of Mongo update is different in 2.4 vs 2.6</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="rajeshks117">Rajesh Sharma</reporter>
                        <labels>
                    </labels>
                <created>Wed, 15 Apr 2015 19:27:47 +0000</created>
                <updated>Wed, 15 Apr 2015 20:47:30 +0000</updated>
                            <resolved>Wed, 15 Apr 2015 20:40:08 +0000</resolved>
                                    <version>2.6.2</version>
                                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="882181" author="rassi@10gen.com" created="Wed, 15 Apr 2015 20:40:08 +0000"  >&lt;p&gt;Hi,&lt;/p&gt;

&lt;p&gt;The 2.4 behavior has been classified as a bug that was fixed for the 2.6.0 production release in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5289&quot; title=&quot;_id field not taken from query during upsert on update&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5289&quot;&gt;&lt;del&gt;SERVER-5289&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;There&apos;s no way to precisely emulate the previous behavior in current versions of the server, unfortunately.  However, this will be possible once &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-18076&quot; title=&quot;Upsert rejected with error if _id assigned to in $setOnInsert and _id equality match specified in query predicate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18076&quot;&gt;&lt;del&gt;SERVER-18076&lt;/del&gt;&lt;/a&gt; is resolved.&lt;/p&gt;

&lt;p&gt;I&apos;m closing this ticket as a duplicate of &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-5289&quot; title=&quot;_id field not taken from query during upsert on update&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-5289&quot;&gt;&lt;del&gt;SERVER-5289&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;~ Jason Rassi&lt;/p&gt;</comment>
                    </comments>
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                            <customfieldvalue>&lt;p&gt;run following in 2.4 vs 2.6 and see the difference. This is creating issue in our code due to upgrade.&lt;/p&gt;

&lt;p&gt;db.books.update(&lt;br/&gt;
   {_id:1234},&lt;br/&gt;
   {&lt;br/&gt;
     item: &quot;XYZ123&quot;,&lt;br/&gt;
     stock: 10,&lt;br/&gt;
     info: &lt;/p&gt;
{ publisher: &quot;2255&quot;, pages: 150 }
&lt;p&gt;,&lt;br/&gt;
     tags: [ &quot;baking&quot;, &quot;cooking&quot; ]&lt;br/&gt;
   },&lt;/p&gt;
   { upsert: true, multi: false}
&lt;p&gt;)&lt;/p&gt;

&lt;p&gt;In 2.4 if the document is missing then it is creating the following document.&lt;br/&gt;
---------------------------------------&lt;br/&gt;
{&lt;br/&gt;
  &quot;_id&quot; : ObjectId(&quot;552eb41bb0af794da9287199&quot;),&lt;br/&gt;
  &quot;item&quot; : &quot;XYZ123&quot;,&lt;br/&gt;
  &quot;stock&quot; : 10.0,&lt;br/&gt;
  &quot;info&quot; : &lt;/p&gt;
{
    &quot;publisher&quot; : &quot;2255&quot;,
    &quot;pages&quot; : 150.0
  }
&lt;p&gt;,&lt;br/&gt;
  &quot;tags&quot; : &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;baking&amp;quot;, &amp;quot;cooking&amp;quot;&amp;#93;&lt;/span&gt;&lt;br/&gt;
}&lt;/p&gt;

&lt;p&gt;In 2.6 it is creating the following in same condition&lt;br/&gt;
----------------------------------------------------------------&lt;br/&gt;
{&lt;br/&gt;
  &quot;_id&quot; : 1234.0,&lt;br/&gt;
  &quot;item&quot; : &quot;XYZ123&quot;,&lt;br/&gt;
  &quot;stock&quot; : 10.0,&lt;br/&gt;
  &quot;info&quot; : &lt;/p&gt;
{
    &quot;publisher&quot; : &quot;2255&quot;,
    &quot;pages&quot; : 150.0
  }
&lt;p&gt;,&lt;br/&gt;
  &quot;tags&quot; : &lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;baking&amp;quot;, &amp;quot;cooking&amp;quot;&amp;#93;&lt;/span&gt;&lt;br/&gt;
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