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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>
    </build-info>


<item>
            <title>[SERVER-22553] mongos_shard_failure_tolerance.js should not rely on order of shard ids</title>
                <link>https://jira.mongodb.org/browse/SERVER-22553</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;h2&gt;&lt;a name=&quot;shardingcsrscontinuousconfigstepdownWTfailedonenterpriserhel6264bithttps%3A%2F%2Fevergreen.mongodb.com%2Ftask%2Fmongodbmongomasterenterpriserhel6264bitshardingcsrscontinuousconfigstepdownWT38ce072a3169ba78f302ffcd37ee6f3ffc866e70160119180211&quot;&gt;&lt;/a&gt;&lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_62_64_bit_sharding_csrs_continuous_config_stepdown_WT_38ce072a3169ba78f302ffcd37ee6f3ffc866e70_16_01_19_18_02_11&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;sharding_csrs_continuous_config_stepdown_WT failed on enterprise-rhel-62-64-bit&lt;/a&gt;&lt;/h2&gt;

&lt;p&gt;&lt;b&gt;mongos_shard_failure_tolerance.js&lt;/b&gt; - &lt;a href=&quot;https://logkeeper.mongodb.org/build/569e83629041300b27768646/test/569e85549041300b2776b670/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Logs&lt;/a&gt; | &lt;a href=&quot;https://evergreen.mongodb.com/task_history/mongodb-mongo-master/sharding_csrs_continuous_config_stepdown_WT#mongos_shard_failure_tolerance.js=fail&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;History&lt;/a&gt;&lt;/p&gt;





&lt;p&gt;&lt;sub&gt;BF Ticket Generated by &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=spencer.jackson&quot; class=&quot;user-hover&quot; rel=&quot;spencer.jackson&quot;&gt;spencer.jackson&lt;/a&gt;&lt;/sub&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="259461">SERVER-22553</key>
            <summary>mongos_shard_failure_tolerance.js should not rely on order of shard ids</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="kaloian.manassiev@mongodb.com">Kaloian Manassiev</assignee>
                                    <reporter username="spencer.jackson@mongodb.com">Spencer Jackson</reporter>
                        <labels>
                            <label>test-only</label>
                    </labels>
                <created>Tue, 19 Jan 2016 21:48:27 +0000</created>
                <updated>Thu, 26 Apr 2018 00:09:57 +0000</updated>
                            <resolved>Wed, 10 Feb 2016 17:14:57 +0000</resolved>
                                                    <fixVersion>3.2.4</fixVersion>
                    <fixVersion>3.3.2</fixVersion>
                    <fixVersion>3.4.15</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1874541" author="xgen-internal-githook" created="Thu, 26 Apr 2018 00:08:07 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;misha@mongodb.com&apos;, &apos;username&apos;: &apos;mikety&apos;, &apos;name&apos;: &apos;Misha Tyulenev&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22553&quot; title=&quot;mongos_shard_failure_tolerance.js should not rely on order of shard ids&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22553&quot;&gt;&lt;del&gt;SERVER-22553&lt;/del&gt;&lt;/a&gt; mongos_rs_shard_failure_tolerance.js should not rely on order of shard ids&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3275fbf2affabe89a7ae9c604d631d0b6a60e8bf&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3275fbf2affabe89a7ae9c604d631d0b6a60e8bf&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1176232" author="xgen-internal-githook" created="Wed, 17 Feb 2016 19:51:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22553&quot; title=&quot;mongos_shard_failure_tolerance.js should not rely on order of shard ids&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22553&quot;&gt;&lt;del&gt;SERVER-22553&lt;/del&gt;&lt;/a&gt; mongos_shard_failure_tolerance.js should not rely on order of shard ids&lt;br/&gt;
Branch: v3.2&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ffe9971c736ded4f9d797eb2152ef27ec98c8a70&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ffe9971c736ded4f9d797eb2152ef27ec98c8a70&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1169466" author="xgen-internal-githook" created="Wed, 10 Feb 2016 17:12:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kaloianm&apos;, u&apos;name&apos;: u&apos;Kaloian Manassiev&apos;, u&apos;email&apos;: u&apos;kaloian.manassiev@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22553&quot; title=&quot;mongos_shard_failure_tolerance.js should not rely on order of shard ids&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22553&quot;&gt;&lt;del&gt;SERVER-22553&lt;/del&gt;&lt;/a&gt; mongos_shard_failure_tolerance.js should not rely on order of shard ids&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5abb483dcf51701f48bc371e0944057412ce2515&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5abb483dcf51701f48bc371e0944057412ce2515&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1169286" author="kaloian.manassiev" created="Wed, 10 Feb 2016 15:46:38 +0000"  >&lt;p&gt;I think this is similar problem to &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22543&quot; title=&quot;multi_write_target.js should not rely on the order of shard ids&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22543&quot;&gt;&lt;del&gt;SERVER-22543&lt;/del&gt;&lt;/a&gt;. The test relies on the shards being returned in a fixed sequence, but won&apos;t always be true. I&apos;ll fix it by removing this assumption.&lt;/p&gt;</comment>
                            <comment id="1164142" author="matt.cotter" created="Thu, 4 Feb 2016 20:25:11 +0000"  >&lt;p&gt;In both cases one of the dbs is getting shut down while a different part of the test is still trying to connecting to them.&lt;br/&gt;
In the original report from Spencer, c20265 is shut down, then the test fails to connect to it:&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:22.470+0000 c20265| 2016-01-19T18:50:21.659+0000 I CONTROL  [signalProcessingThread] got signal 15 (Terminated), will terminate after current cmd ends&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;
		&lt;/tr&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;   width: auto; padding: 0;&quot;&gt;&amp;nbsp;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:26.429+0000 ReplSetTest Could not call ismaster on node connection to ip-10-47-166-201:20264: Error: error doing query: failed: network error while attempting to run command &apos;ismaster&apos; on host &apos;ip-10-47-166-201:20264&apos;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:26.430+0000 2016-01-19T18:50:26.429+0000 I NETWORK  [thread2] trying reconnect to ip-10-47-166-201:20265 (10.47.166.201) failed&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:26.430+0000 2016-01-19T18:50:26.430+0000 W NETWORK  [thread2] Failed to connect to 10.47.166.201:20265, reason: errno:111 Connection refused&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:26.431+0000 2016-01-19T18:50:26.430+0000 I NETWORK  [thread2] reconnect ip-10-47-166-201:20265 (10.47.166.201) failed failed&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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-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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:26.431+0000 ReplSetTest Could not call ismaster on node connection to ip-10-47-166-201:20265: Error: socket exception [CONNECT_ERROR] for couldn&apos;t connect to server ip-10-47-166-201:20265, connection attempt failed&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;Something similar happens in Charlie&apos;s patch build.&lt;br/&gt;
To me this doesn&apos;t look like a networking error. Bouncing over to sharding.&lt;/p&gt;</comment>
                            <comment id="1162948" author="charlie.swanson" created="Wed, 3 Feb 2016 21:55:08 +0000"  >&lt;p&gt;Looks like it happened again in my &lt;a href=&quot;https://evergreen.mongodb.com/task/mongodb_mongo_master_enterprise_rhel_62_64_bit_sharding_csrs_continuous_config_stepdown_WT_83afa046ee7470664f877b7d741d0a0e33780f16_16_02_03_19_29_10&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;patch build&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1147938" author="spencer.jackson@10gen.com" created="Tue, 19 Jan 2016 21:58:45 +0000"  >&lt;p&gt;Huh... The error is:&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.814+0000 ----&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.814+0000 Testing active connection...&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.814+0000 ----&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.814+0000 &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.814+0000 &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.815+0000 c20264| 2016-01-19T18:50:21.377+0000 D REPL     [SyncSourceFeedback] Sending slave oplog progress to upstream updater: { replSetUpdatePosition: 1, optimes: [ { _id: ObjectId(&apos;000000000000000000000000&apos;), optime: { ts: Timestamp 1453229419000|6, t: 2 }, memberId: 0, cfgver: 2 }, { _id: ObjectId(&apos;569e8555754ab418b8071cfa&apos;), optime: { ts: Timestamp 1453229421000|5, t: 2 }, memberId: 1, cfgver: 2 }, { _id: ObjectId(&apos;000000000000000000000000&apos;), optime: { ts: Timestamp 1453229412000|18, t: 1 }, memberId: 2, cfgver: 2 } ] }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.816+0000 c20264| 2016-01-19T18:50:21.377+0000 D ASIO     [NetworkInterfaceASIO-BGSync-0] Starting asynchronous command 277 on host ip-10-47-166-201:20265&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.816+0000 c20264| 2016-01-19T18:50:21.378+0000 D ASIO     [NetworkInterfaceASIO-BGSync-0] Failed to time operation 277 out: Operation aborted.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.816+0000 c20264| 2016-01-19T18:50:21.378+0000 D REPL     [rsBackgroundSync-0] fetcher read 0 operations from remote oplog&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.817+0000 c20264| 2016-01-19T18:50:21.379+0000 D COMMAND  [conn10] run command config.$cmd { find: &quot;databases&quot;, filter: { _id: &quot;fooUnsharded&quot; }, readConcern: { level: &quot;majority&quot;, afterOpTime: { ts: Timestamp 1453229421000|5, t: 2 } }, limit: 1, maxTimeMS: 30000 }&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.817+0000 c20264| 2016-01-19T18:50:21.379+0000 D QUERY    [conn10] Using idhack: query: { _id: &quot;fooUnsharded&quot; } sort: {} projection: {} limit: 1&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.818+0000 2016-01-19T18:50:21.653+0000 E QUERY    [thread1] Error: error: { &quot;ok&quot; : 0, &quot;errmsg&quot; : &quot;Connection refused&quot;, &quot;code&quot; : 6 } :&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.818+0000 _getErrorWithCode@src/mongo/shell/utils.js:23:13&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.818+0000 DBCommandCursor@src/mongo/shell/query.js:679:1&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.818+0000 DBQuery.prototype._exec@src/mongo/shell/query.js:105:28&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.818+0000 DBQuery.prototype.hasNext@src/mongo/shell/query.js:267:5&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.819+0000 DBCollection.prototype.findOne@src/mongo/shell/collection.js:215:12&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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-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;[js_test:mongos_shard_failure_tolerance] 2016-01-19T18:50:21.819+0000 @jstests/sharding/mongos_shard_failure_tolerance.js:65:18&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;From the JSTest in question, starting at line 64:&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;   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;assert.neq(null, mongosConnActive.getCollection( collSharded.toString() ).findOne({ _id : -1 }));&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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-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;assert.neq(null, mongosConnActive.getCollection( collSharded.toString() ).findOne({ _id : 1 }));&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;So it seems we try to make two consecutive findOne calls, and the second fails with some sort of connection refused message. Maybe this is something with networking? &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=samantha.ritter&quot; class=&quot;user-hover&quot; rel=&quot;samantha.ritter&quot;&gt;samantha.ritter&lt;/a&gt;, could you take a look at this, or forward on to someone else who might have a better idea about what&apos;s going on here?&lt;/p&gt;</comment>
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