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<channel>
    <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-5286] DBClientBase::findN: transport error for query: { mapreduce.shardedfinish: {....} }</title>
                <link>https://jira.mongodb.org/browse/SERVER-5286</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;we are running an unauthenticated sharded setup with 4 shards, each a replicaset of 2 members and an arbiter. all nodes are running 2.0.3. periodically, mapreduce jobs fail with:&lt;/p&gt;


&lt;p&gt;Array&lt;br/&gt;
(&lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;assertion&amp;#93;&lt;/span&gt; =&amp;gt; DBClientBase::findN: transport error: mongo-s1-01:27011 query: { mapreduce.shardedfinish: { mapreduce: &quot;PageView&quot;, map: CodeWScope( function() &lt;/p&gt;
{ ... }
&lt;p&gt;, {}), reduce: CodeWScope( &lt;br/&gt;
        function(k, vals) &lt;/p&gt;
{
...
        }
&lt;p&gt;    , {}), query: { date: &lt;/p&gt;
{ $gt: 1330944522 }
&lt;p&gt;, content_type: &lt;/p&gt;
{ $in: [ &quot;text/html; charset=utf-8&quot;, &quot;text/html&quot; ] }
&lt;p&gt; }, out: &quot;mr.PageView.1331545722.6649.700620&quot; }, shardedOutputCollection: &quot;tmp.mrs.PageView_1331545723_8&quot;, shards: { shard2/mongo-s2-02:27022,mongo-s2-01:27021: { result: &quot;tmp.mrs.PageView_1331545723_8&quot;, timeMillis: 7056, counts: &lt;/p&gt;
{ input: 146527, emit: 35517, reduce: 4562, output: 1391 }
&lt;p&gt;, ok: 1.0 }, shard3/mongo-s3-01:27017,mongo-s3-02:27017: { result: &quot;tmp.mrs.PageView_1331545723_8&quot;, timeMillis: 2127, counts: &lt;/p&gt;
{ input: 37213, emit: 34834, reduce: 4460, output: 1351 }
&lt;p&gt;, ok: 1.0 }, shard4/mongo-s4-02:27017,mongo-s4-03:27017,mongo-s4-01:27017: { result: &quot;tmp.mrs.PageView_1331545723_8&quot;, timeMillis: 3031, counts: &lt;/p&gt;
{ input: 58947, emit: 51909, reduce: 5721, output: 2096 }
&lt;p&gt;, ok: 1.0 } }, shardCounts: { shard2/mongo-s2-02:27022,mongo-s2-01:27021: &lt;/p&gt;
{ input: 146527, emit: 35517, reduce: 4562, output: 1391 }
&lt;p&gt;, shard3/mongo-s3-01:27017,mongo-s3-02:27017: &lt;/p&gt;
{ input: 37213, emit: 34834, reduce: 4460, output: 1351 }
&lt;p&gt;, shard4/mongo-s4-02:27017,mongo-s4-03:27017,mongo-s4-01:27017: &lt;/p&gt;
{ input: 58947, emit: 51909, reduce: 5721, output: 2096 }
&lt;p&gt; }, counts: &lt;/p&gt;
{ emit: 122260, input: 242687, output: 4838, reduce: 14743 }
&lt;p&gt; }&lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;assertionCode&amp;#93;&lt;/span&gt; =&amp;gt; 10276&lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;errmsg&amp;#93;&lt;/span&gt; =&amp;gt; db assertion failure&lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;ok&amp;#93;&lt;/span&gt; =&amp;gt; 0&lt;br/&gt;
)&lt;/p&gt;

&lt;p&gt;this happens periodically. running flushRouterConfig ahead of the MR job does not resolve this issue. bouncing mongos does not resolve the issue. in back to back runs, it fails about 4 out of every 5 tries with 1 success despite no changes on our end.&lt;/p&gt;</description>
                <environment>ubuntu 10.04 x86_64</environment>
        <key id="32735">SERVER-5286</key>
            <summary>DBClientBase::findN: transport error for query: { mapreduce.shardedfinish: {....} }</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="9">Done</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="wayne530">Y. Wayne Huang</reporter>
                        <labels>
                            <label>212push</label>
                    </labels>
                <created>Mon, 12 Mar 2012 10:00:49 +0000</created>
                <updated>Fri, 15 Feb 2013 15:06:46 +0000</updated>
                            <resolved>Wed, 29 Aug 2012 19:45:15 +0000</resolved>
                                    <version>2.0.3</version>
                                                    <component>MapReduce</component>
                    <component>Sharding</component>
                                        <votes>2</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="158185" author="renctan" created="Wed, 29 Aug 2012 19:45:02 +0000"  >&lt;p&gt;Basing on the given steps, I believe this is by design. A reconfiguration on the primary can cause the primary to close all connections and will take some time to recover:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://docs.mongodb.org/manual/reference/replica-configuration/#usage&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/replica-configuration/#usage&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;There is also a ticket (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6752&quot; title=&quot;Do not close all connections on replica set reconfig&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6752&quot;&gt;&lt;del&gt;SERVER-6752&lt;/del&gt;&lt;/a&gt;) to make the reconfiguration less sensitive.&lt;/p&gt;</comment>
                            <comment id="140240" author="kamaradclimber" created="Fri, 6 Jul 2012 08:08:32 +0000"  >&lt;p&gt;I get the exact same issue with 2.0.6.&lt;/p&gt;</comment>
                            <comment id="113441" author="wayne530" created="Wed, 25 Apr 2012 05:55:39 +0000"  >&lt;p&gt;what&apos;s the status of this? i&apos;ve verified the same behavior exists in 2.0.4&lt;/p&gt;</comment>
                            <comment id="107125" author="wayne530" created="Thu, 5 Apr 2012 20:03:27 +0000"  >&lt;p&gt;hi Antoine, thanks for narrowing down the issue. any idea when we might see a fix for this? it&apos;s a bit of a pain to have to pause all activity and wait for existing in-progress jobs to finish just to reconfigure a RS. thanks!&lt;/p&gt;</comment>
                            <comment id="101256" author="antoine" created="Thu, 22 Mar 2012 07:52:09 +0000"  >&lt;p&gt;There is a SocketException thrown in server and caught at:&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;	mongo::ParallelSortClusteredCursor::_oldInit() at /Users/antoine/workspace/mongo/src/mongo/client/parallel.cpp:1,279 0x1002c9a55	&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;	mongo::ParallelSortClusteredCursor::_init() at /Users/antoine/workspace/mongo/src/mongo/client/parallel.cpp:1,169 0x1002c2b78	&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;	mongo::ClusteredCursor::init() at /Users/antoine/workspace/mongo/src/mongo/client/parallel.cpp:82 0x1002af8c3	&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;	mongo::mr::MapReduceFinishCommand::run() at /Users/antoine/workspace/mongo/src/mongo/db/commands/mr.cpp:1,296 0x1005ccfca	&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;	mongo::_execCommand() at /Users/antoine/workspace/mongo/src/mongo/db/dbcommands.cpp:1,786 0x1002f723e	&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;	mongo::execCommand() at /Users/antoine/workspace/mongo/src/mongo/db/dbcommands.cpp:1,892 0x1002f8c84	&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;	mongo::_runCommands() at /Users/antoine/workspace/mongo/src/mongo/db/dbcommands.cpp:1,974 0x1002f9f90	&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;	mongo::runCommands() at /Users/antoine/workspace/mongo/src/mongo/db/ops/query.cpp:42 0x100112c05	&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;	mongo::runQuery() at /Users/antoine/workspace/mongo/src/mongo/db/ops/query.cpp:810 0x100113470	&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;	receivedQuery() at /Users/antoine/workspace/mongo/src/mongo/db/instance.cpp:242 0x10070f0cd	&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;error is within call to:&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;                    _cursors[i].raw()-&amp;gt;initLazy( ! firstPass );&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;Seems like there are some RS connections in a bad state, and after about 5-10 MR they are cleaned up and MR works again.&lt;/p&gt;</comment>
                            <comment id="101225" author="antoine" created="Thu, 22 Mar 2012 02:07:33 +0000"  >&lt;p&gt;bug is also in 2.0.4 and trunk (2.1.1)&lt;/p&gt;

&lt;p&gt;To reproduce:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;add a replica to a shard&lt;/li&gt;
	&lt;li&gt;do a MR that uses a sharded input&lt;/li&gt;
	&lt;li&gt;stop and remove that new replica&lt;/li&gt;
	&lt;li&gt;find() still works but MR fails (and I believe some other commands too)&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;1st error returned 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;com.mongodb.CommandResult$CommandFailure: command failed [command failed [mapreduce] { &quot;serverUsed&quot; : &quot;localhost:27001&quot; , &quot;ok&quot; : 0.0 , &quot;errmsg&quot; : &quot;final reduce failed: { result: \&quot;mrout\&quot;, errmsg: \&quot;exception: could not initialize cursor across all shards because : socket exception @ foo/agmac.local:27017,agmac.local:27018\&quot;, code: 14827, ok: 0.0 }&quot;}&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;	at com.mongodb.CommandResult.getException(CommandResult.java:75)&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;	at com.mongodb.CommandResult.throwOnError(CommandResult.java:121)&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;subsequent errors returned are:&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;com.mongodb.CommandResult$CommandFailure: command failed [command failed [mapreduce] { &quot;serverUsed&quot; : &quot;localhost:27001&quot; , &quot;assertion&quot; : &quot;DBClientBase::findN: transport error: agmac.local:27018 query: { setShardVersion: \&quot;\&quot;, init: true, configdb: \&quot;localhost:27000\&quot;, serverID: ObjectId(&apos;4f6a2d0fc7e45c8360ef9a03&apos;), authoritative: true }&quot; , &quot;assertionCode&quot; : 10276 , &quot;errmsg&quot; : &quot;db assertion failure&quot; , &quot;ok&quot; : 0}&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;	at com.mongodb.CommandResult.getException(CommandResult.java:75)&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;	at com.mongodb.CommandResult.throwOnError(CommandResult.java:121)&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>
                            <comment id="101086" author="antoine" created="Wed, 21 Mar 2012 19:40:09 +0000"  >&lt;p&gt;I am able to reproduce.&lt;br/&gt;
The error doesnt lie in mongos, but in the mongod that does the final MR post processing.&lt;br/&gt;
This server is gathering docs from all other shards, but it seems that it gets an error when opening a cursor to do so, after one of the shard&apos;s replica was reconfigured to remove a server.&lt;br/&gt;
This is odd since the removed server is a secondary, and should not be used in the case where slaveOk=false.&lt;br/&gt;
This is verified with mongod 2.0.2, trying with 2.0.4&lt;/p&gt;</comment>
                            <comment id="100465" author="antoine" created="Tue, 20 Mar 2012 08:35:51 +0000"  >&lt;p&gt;Trying to reproduce, will confirm&lt;/p&gt;</comment>
                            <comment id="100156" author="wayne530" created="Mon, 19 Mar 2012 15:56:08 +0000"  >&lt;p&gt;anything?&lt;/p&gt;</comment>
                            <comment id="98433" author="wayne530" created="Tue, 13 Mar 2012 19:48:20 +0000"  >&lt;p&gt;one of our replicaset members was under maint by our provider, so i added a new one (first reconfig) as a backup. this is when i first noticed the issue and filed the bug. then the provider told us they could not recover the failed node, so i removed it (second reconfig) last night and noticed this behavior again.&lt;/p&gt;</comment>
                            <comment id="98432" author="wayne530" created="Tue, 13 Mar 2012 19:46:33 +0000"  >&lt;p&gt;yes i reproduced the issue last night. i cannot find a manual way to fix this issue (such as flushRouterConfig) but it does seem to go away by itself or possibly the manual fixes i tried take a while to propagate. of that, i&apos;m unsure.&lt;/p&gt;</comment>
                            <comment id="98428" author="antoine" created="Tue, 13 Mar 2012 19:36:30 +0000"  >&lt;p&gt;so are you positive that this issue only happened whey you reconfigured a replica set?&lt;/p&gt;</comment>
                            <comment id="98133" author="wayne530" created="Tue, 13 Mar 2012 02:53:00 +0000"  >&lt;p&gt;it appears to happen after a change to an underlying replicaset, such as addition or removal of members. it remains in this state for some time, where most MR jobs will fail. eventually though it seems to sort itself out.&lt;/p&gt;</comment>
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