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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-3530] Certain types of invalid keys which buggy drivers permit (such as invalid $ operators) can save in server validly, but choke replication</title>
                <link>https://jira.mongodb.org/browse/SERVER-3530</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Certain keys which are technically invalid in MongoDB can still be inserted into the database and save validly.&lt;/p&gt;

&lt;p&gt;However, they will choke the replication system and cause all secondaries&apos; attempts to replicate that data to fail.&lt;/p&gt;

&lt;p&gt;By way of example, Java Drivers prior to version 2.4 allowed insert with an arbitrary made-up &quot;$&quot; operator field name, which will insert correctly but fail on replication as evinced in CS-1059.&lt;/p&gt;

&lt;p&gt;Using a release of Casbah linked against Java Driver 2.3, I can insert the following:&lt;/p&gt;

&lt;p&gt;    scala&amp;gt; m.insert(MongoDBObject(&quot;_id&quot; -&amp;gt; MongoDBObject(&quot;$uid&quot; -&amp;gt; &quot;OMGWTFBBQ&quot;)))&lt;br/&gt;
    res1: com.mongodb.WriteResult = &lt;/p&gt;
{ &quot;n&quot; : 0 , &quot;connectionId&quot; : 253 , &quot;err&quot; :  null  , &quot;ok&quot; : 1.0}

&lt;p&gt;Which shows up in MongoDB as:&lt;/p&gt;

&lt;p&gt;    &amp;gt; db.omgPonies.find()&lt;br/&gt;
    { &quot;_id&quot; : &lt;/p&gt;
{ &quot;$uid&quot; : &quot;OMGWTFBBQ&quot; }
&lt;p&gt; }&lt;/p&gt;

&lt;p&gt;Replica members will, however, report an error when trying to replicate the oplog entry for the insert along the lines of &quot;&lt;span class=&quot;error&quot;&gt;&amp;#91;rs_sync&amp;#93;&lt;/span&gt; replSet syncThread: 10068 invalid operator: $uid &quot;&lt;/p&gt;


</description>
                <environment></environment>
        <key id="20467">SERVER-3530</key>
            <summary>Certain types of invalid keys which buggy drivers permit (such as invalid $ operators) can save in server validly, but choke replication</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</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="5">Cannot Reproduce</resolution>
                                        <assignee username="matt.dannenberg">Matt Dannenberg</assignee>
                                    <reporter username="brendan">Brendan W. McAdams</reporter>
                        <labels>
                    </labels>
                <created>Wed, 3 Aug 2011 22:43:13 +0000</created>
                <updated>Wed, 10 Dec 2014 23:18:02 +0000</updated>
                            <resolved>Thu, 23 May 2013 17:54:03 +0000</resolved>
                                    <version>1.6.5</version>
                                                    <component>Replication</component>
                                        <votes>4</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="343926" author="mattd@10gen.com" created="Thu, 23 May 2013 17:54:03 +0000"  >&lt;p&gt;This bug is for a very old version at this point and I was unable to reproduce it on the current version with the C++ driver.&lt;/p&gt;</comment>
                            <comment id="150053" author="aljensen" created="Thu, 2 Aug 2012 20:57:21 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-328&quot; title=&quot;optinally don&amp;#39;t check field names in JS (WAS: field names cannot start with $ [$set])&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-328&quot;&gt;&lt;del&gt;SERVER-328&lt;/del&gt;&lt;/a&gt; looks like was related to this&lt;/p&gt;</comment>
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