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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-19568] Diagnostic log operation entry format for find/getMore commands</title>
                <link>https://jira.mongodb.org/browse/SERVER-19568</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The format of the query log line will differ based on whether the query was delivered using the 3.0-and-earlier OP_QUERY/OP_GET_MORE find protocol or using the find/getMore commands. Consider the following example query:&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;
		&lt;tbody &gt;
				&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;   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;db.collection.find({a: {$gt: 3}}, {_id: 0, a: 1, b: 1}).sort({b: 1}).skip(11).limit(12);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;If this query is delivered to a version 3.2 mongod using OP_QUERY/OP_GET_MORE wire protocol reads, the resulting log line will look something like this:&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;
		&lt;tbody &gt;
				&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;   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;2015-09-23T14:39:21.452-0400 I QUERY    [conn1] query test.collection query: { query: { a: { $gt: 3.0 } }, orderby: { b: 1.0 } } planSummary: COLLSCAN, COLLSCAN ntoreturn:12 ntoskip:11 keysExamined:0 docsExamined:4 hasSortStage:1 cursorExhausted:1 keyUpdates:0 writeConflicts:0 numYields:0 nreturned:0 reslen:20 locks:{ Global: { acquireCount: { r: 2 } }, Database: { acquireCount: { r: 1 } }, Collection: { acquireCount: { r: 1 } } } 0ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;In contrast, if the query is delivered to a version 3.2 mongod using the find command, the log line will be:&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;
		&lt;tbody &gt;
				&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;   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;2015-09-23T14:40:21.901-0400 I COMMAND  [conn2] command test.collection command: find { find: &quot;collection&quot;, filter: { a: { $gt: 3.0 } }, skip: 11.0, limit: 12.0, singleBatch: false, sort: { b: 1.0 }, projection: { _id: 0.0, a: 1.0, b: 1.0 } } planSummary: COLLSCAN keysExamined:0 docsExamined:2 hasSortStage:1 cursorExhausted:1 keyUpdates:0 writeConflicts:0 numYields:0 nreturned:0 reslen:106 locks:{ Global: { acquireCount: { r: 2 } }, Database: { acquireCount: { r: 1 } }, Collection: { acquireCount: { r: 1 } } } protocol:op_command 0ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;The differences between the two formats are:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;OP_QUERY/OP_GET_MORE diagnostic log entries begin with the word &lt;tt&gt;query&lt;/tt&gt; and list the query predicate and other modifiers after &quot;&lt;tt&gt;query:&lt;/tt&gt;&quot;. Like all other commands, the find command log line instead begins with the word &lt;tt&gt;command&lt;/tt&gt; and lists the command parameters object after &quot;&lt;tt&gt;command:&lt;/tt&gt;&quot;.&lt;/li&gt;
	&lt;li&gt;The find command log lines omit the &lt;tt&gt;ntoreturn&lt;/tt&gt; and &lt;tt&gt;ntoskip&lt;/tt&gt; information, since this is redundant with the find command parameters. The find command has parameters named &lt;tt&gt;skip&lt;/tt&gt;, &lt;tt&gt;limit&lt;/tt&gt;, and &lt;tt&gt;batchSize&lt;/tt&gt; which contain this information.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Similarly, a getMore command will be logged just like any other command, and not like an OP_GET_MORE wire protocol message:&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;
		&lt;tbody &gt;
				&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;   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;2015-09-23T15:13:27.141-0400 I COMMAND  [conn2] command test.collection command: getMore { getMore: 17696123619, collection: &quot;collection&quot;, batchSize: 2.0 } ntoreturn:1 ntoskip:0 cursorExhausted:1 keyUpdates:0 writeConflicts:0 numYields:0 reslen:123 locks:{ Global: { acquireCount: { r: 2 } }, Database: { acquireCount: { r: 1 } }, Collection: { acquireCount: { r: 1 } } } protocol:op_command 0ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="222511">SERVER-19568</key>
            <summary>Diagnostic log operation entry format for find/getMore commands</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="rassi">J Rassi</reporter>
                        <labels>
                    </labels>
                <created>Thu, 23 Jul 2015 23:34:38 +0000</created>
                <updated>Wed, 7 Oct 2015 21:35:45 +0000</updated>
                            <resolved>Wed, 23 Sep 2015 18:36:00 +0000</resolved>
                                                    <fixVersion>3.1.9</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1041162" author="xgen-internal-githook" created="Wed, 23 Sep 2015 18:35:17 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;dstorch&apos;, u&apos;name&apos;: u&apos;David Storch&apos;, u&apos;email&apos;: u&apos;david.storch@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19568&quot; title=&quot;Diagnostic log operation entry format for find/getMore commands&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19568&quot;&gt;&lt;del&gt;SERVER-19568&lt;/del&gt;&lt;/a&gt; omit ntoreturn and ntoskip fields from find command log line&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/75115dfaab9da2854b0fd892ce029781afea2731&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/75115dfaab9da2854b0fd892ce029781afea2731&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1031002" author="rassi@10gen.com" created="Tue, 15 Sep 2015 21:13:50 +0000"  >&lt;p&gt;Relatedly, it is somewhat confusing that &quot;ntoreturn: 0&quot; is listed in the diagnostic log entry for find commands that have a non-zero batchSize or limit.  For example:&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;
		&lt;tbody &gt;
				&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;   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;2015-09-15T17:12:02.952-0400 I COMMAND  [conn2] command test.foo command: find { find: &quot;foo&quot;, filter: {}, limit: 5.0, singleBatch: false } planSummary: COLLSCAN ntoreturn:0 ntoskip:0 keysExamined:0 docsExamined:5 cursorExhausted:1 keyUpdates:0 writeConflicts:0 numYields:0 nreturned:5 reslen:224 locks:{ Global: { acquireCount: { r: 2 } }, MMAPV1Journal: { acquireCount: { r: 1 } }, Database: { acquireCount: { r: 1 } }, Collection: { acquireCount: { R: 1 } } } protocol:op_command 0ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="231222">DOCS-6259</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="226931">SERVER-20107</issuekey>
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