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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-26261] MongoRunner.versionIterator.iterator.toString() should not advance the iterator</title>
                <link>https://jira.mongodb.org/browse/SERVER-26261</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;MongoRunner.versionIterator is a way to express that a test should be run for multiple binVersions. It currently exposes a single method called toString() which both gets the current value of the iterator and advances it. Instead, it should have separate &lt;tt&gt;peek()&lt;/tt&gt; and &lt;tt&gt;next()&lt;/tt&gt; methods for reading and advancing the value respectively.&lt;/p&gt;

&lt;p&gt;This is important because it is easy to subtly break a test in the multiVersion suite by calling toString() on the iterator. This advances the iterator and causes MongoRunner to later launch the wrong version.&lt;/p&gt;

&lt;p&gt;After this is fixed, we should be able to re-enable the following tests:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;jstests/multiVersion/2_test_launching_cluster.js&lt;/li&gt;
	&lt;li&gt;jstests/multiVersion/dumprestore_sharded.js&lt;/li&gt;
&lt;/ul&gt;
</description>
                <environment></environment>
        <key id="318280">SERVER-26261</key>
            <summary>MongoRunner.versionIterator.iterator.toString() should not advance the iterator</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="9">Done</resolution>
                                        <assignee username="max.hirschhorn@mongodb.com">Max Hirschhorn</assignee>
                                    <reporter username="david.storch@mongodb.com">David Storch</reporter>
                        <labels>
                    </labels>
                <created>Thu, 22 Sep 2016 22:25:19 +0000</created>
                <updated>Sat, 19 Nov 2016 00:05:56 +0000</updated>
                            <resolved>Wed, 9 Nov 2016 14:08:44 +0000</resolved>
                                                    <fixVersion>3.4.0-rc3</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1430124" author="xgen-internal-githook" created="Wed, 9 Nov 2016 14:06:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;visemet&apos;, u&apos;name&apos;: u&apos;Max Hirschhorn&apos;, u&apos;email&apos;: u&apos;max.hirschhorn@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26261&quot; title=&quot;MongoRunner.versionIterator.iterator.toString() should not advance the iterator&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26261&quot;&gt;&lt;del&gt;SERVER-26261&lt;/del&gt;&lt;/a&gt; Expose current() and advance() methods on version iterator.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/6359f80037d38c3d342543822550d7350aa91ee7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/6359f80037d38c3d342543822550d7350aa91ee7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1394870" author="esha.maharishi@10gen.com" created="Tue, 27 Sep 2016 18:08:07 +0000"  >&lt;p&gt;just happened to notice this: &lt;a href=&quot;https://github.com/mongodb/mongo/blob/3.3.12/src/mongo/shell/servers.js#L122-L125&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/3.3.12/src/mongo/shell/servers.js#L122-L125&lt;/a&gt;&lt;/p&gt;</comment>
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                    <name>Related</name>
                                                                <inwardlinks description="is related to">
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            <issuekey id="302409">SERVER-25158</issuekey>
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