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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-17887] Overflow generated OpTimes from i field into t field</title>
                <link>https://jira.mongodb.org/browse/SERVER-17887</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Currently, if the i field of the global OpTime on a server increments past signed int max, we abort the process:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;     if (val.getInc() &amp;amp; 0x80000000) {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            mongo::warning() &amp;lt;&amp;lt; &quot;clock skew detected  prev: &quot; &amp;lt;&amp;lt; val.getSecs()&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;                             &amp;lt;&amp;lt; &quot; now: &quot; &amp;lt;&amp;lt; (unsigned) time(0) &amp;lt;&amp;lt; std::endl;&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;            return true;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;        }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;Instead, we could handle this by incrementing the &quot;secs&quot; field by one and resetting the &quot;inc&quot; field back to 1. (The code resets the inc field back to 1 instead of 0 in the normal case, for some reason.)&lt;/p&gt;</description>
                <environment></environment>
        <key id="193926">SERVER-17887</key>
            <summary>Overflow generated OpTimes from i field into t field</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="3">Duplicate</resolution>
                                        <assignee username="william.schultz@mongodb.com">William Schultz</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                            <label>neweng</label>
                    </labels>
                <created>Fri, 3 Apr 2015 16:56:22 +0000</created>
                <updated>Fri, 31 Mar 2017 00:05:04 +0000</updated>
                            <resolved>Mon, 27 Mar 2017 19:14:27 +0000</resolved>
                                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1533595" author="william.schultz" created="Mon, 27 Mar 2017 19:14:27 +0000"  >&lt;p&gt;Addressed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28352&quot; title=&quot;Fix ticks increment in LogicalCLock::reserveTicks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28352&quot;&gt;&lt;del&gt;SERVER-28352&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="1528427" author="william.schultz" created="Mon, 20 Mar 2017 17:53:46 +0000"  >&lt;p&gt;As part of the work on the causal consistency project (PM-221), &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.0/src/mongo/db/global_timestamp.cpp&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;global_timestamp.cpp&lt;/a&gt; has been replaced by &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/logical_clock.cpp&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;logical_clock.cpp&lt;/a&gt;, and the issue referenced in this ticket is now addressed by &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28352&quot; title=&quot;Fix ticks increment in LogicalCLock::reserveTicks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28352&quot;&gt;&lt;del&gt;SERVER-28352&lt;/del&gt;&lt;/a&gt;. &lt;/p&gt;

&lt;p&gt;We should still decide if we also want to address this issue on an older branch for sake of backport to 3.4/3.2, since I am assuming that the logical clock work will not be backported.&lt;/p&gt;</comment>
                            <comment id="1451835" author="spencer" created="Wed, 7 Dec 2016 20:53:50 +0000"  >&lt;p&gt;As part of this we must make sure &lt;a href=&quot;https://github.com/mongodb/mongo/blob/r3.4.0/src/mongo/db/global_timestamp.cpp#L68&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this fassert&lt;/a&gt; in global_timestamp.cpp isn&apos;t a problem if the global timestamp overflows the counter in a single second.&lt;/p&gt;</comment>
                            <comment id="1242541" author="milkie" created="Thu, 21 Apr 2016 15:08:09 +0000"  >&lt;p&gt;Change of plans.  Work on &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-18557&quot; title=&quot;Change oplog OpTime format to raw 64bit values&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18557&quot;&gt;SERVER-18557&lt;/a&gt; will be delayed so the overflow work is still desirable in the near term.&lt;/p&gt;</comment>
                            <comment id="1241703" author="milkie" created="Wed, 20 Apr 2016 19:48:55 +0000"  >&lt;p&gt;Instead, we will do &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-18557&quot; title=&quot;Change oplog OpTime format to raw 64bit values&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18557&quot;&gt;SERVER-18557&lt;/a&gt;&lt;/p&gt;</comment>
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