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    <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-1583] AwaitData flag causes abnormal high delay</title>
                <link>https://jira.mongodb.org/browse/SERVER-1583</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I send OP_QUERY with TailableCursors and AwaitData flags. Plain hex flags = 22 00 00 00.&lt;br/&gt;
New data arrives with high delay (about 30-40 secs). If I remove AwaitData and re-send getQuery(), it works fast as usually.&lt;/p&gt;

&lt;p&gt;Is it excepted? I thought that AwaitData should send new objects without delay.&lt;/p&gt;

&lt;p&gt;I may give you root access to my testing machine.&lt;/p&gt;</description>
                <environment>Linux 64-bit</environment>
        <key id="12696">SERVER-1583</key>
            <summary>AwaitData flag causes abnormal high delay</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="gf">gf</reporter>
                        <labels>
                    </labels>
                <created>Fri, 6 Aug 2010 17:08:34 +0000</created>
                <updated>Fri, 30 Mar 2012 14:37:08 +0000</updated>
                            <resolved>Fri, 2 Sep 2011 04:41:18 +0000</resolved>
                                    <version>1.6.0</version>
                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="16556" author="gf" created="Fri, 6 Aug 2010 17:49:25 +0000"  >&lt;p&gt;Yes, of course. But the code is quite non-trivial (you can&apos;t run it without compiling php, pecl-libevent, etc). I&apos;m using phpDaemon (&lt;a href=&quot;http://phpdaemon.net/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://phpdaemon.net/&lt;/a&gt;). Standard example chat (&lt;a href=&quot;http://github.com/kakserpom/phpdaemon-muchat&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/kakserpom/phpdaemon-muchat&lt;/a&gt;).&lt;br/&gt;
After I updated mongodb to 1.6, it still works fine as usually.&lt;br/&gt;
But when I remove the line 109 from app-clients/MongoClient.php (it turns on the AwaitData bit), high delay appears.&lt;/p&gt;</comment>
                            <comment id="16549" author="eliot" created="Fri, 6 Aug 2010 17:11:54 +0000"  >&lt;p&gt;Can you send the code you&apos;re using?&lt;/p&gt;</comment>
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