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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-40540] Validate the parameters to configureFailPoint given the failPoint being configured.</title>
                <link>https://jira.mongodb.org/browse/SERVER-40540</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;For example, if a &quot;failCommand&quot; falpoint is configured with configureFailPoint but without a command to fail, the operation succeeds:&lt;/p&gt;

&lt;p/&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
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					&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;	&quot;$clusterTime&quot; : {&lt;/span&gt;&lt;/pre&gt;
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					&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;		&quot;clusterTime&quot; : Timestamp(1554754729, 1),&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;
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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;	&quot;operationTime&quot; : Timestamp(1554754729, 1)&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;   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;/div&gt;
&lt;p/&gt;

&lt;p&gt;However, since no fail point was set as a result, this command should have failed with an appropriate error message indicating the requirement to supply a command to fail.&lt;/p&gt;</description>
                <environment></environment>
        <key id="732885">SERVER-40540</key>
            <summary>Validate the parameters to configureFailPoint given the failPoint being configured.</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-servicearch">Backlog - Service Architecture</assignee>
                                    <reporter username="oleg.pudeyev@mongodb.com">Oleg Pudeyev</reporter>
                        <labels>
                            <label>devtools-to-servicearch</label>
                            <label>re-triaged-ticket</label>
                    </labels>
                <created>Mon, 8 Apr 2019 20:20:47 +0000</created>
                <updated>Tue, 28 Mar 2023 19:47:16 +0000</updated>
                            <resolved>Tue, 28 Mar 2023 19:47:16 +0000</resolved>
                                    <version>4.1.9</version>
                                                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="4375697" author="JIRAUSER1262719" created="Thu, 24 Feb 2022 21:56:07 +0000"  >&lt;p&gt;We haven&#8217;t heard back from you for at least one calendar year, so this issue is being closed. If this is still an issue for you, please provide additional information and we will reopen the ticket.&lt;/p&gt;</comment>
                            <comment id="2215711" author="oleg.pudeyev" created="Tue, 16 Apr 2019 20:25:45 +0000"  >&lt;p&gt;Okay changing this ticket to a feature request sounds good.&lt;/p&gt;</comment>
                            <comment id="2215032" author="gabriel.russell" created="Tue, 16 Apr 2019 14:47:48 +0000"  >&lt;blockquote&gt;&lt;p&gt;With that, if the data parameter is stated to be required&lt;/p&gt;&lt;/blockquote&gt;

&lt;p&gt;The &quot;data&quot; parameter is not strictly required. failpoints can be written that do not need &quot;data&quot;, and no failpoints, &quot;failCommand&quot; included, require &quot;data&quot; when &quot;mode&quot; is &quot;off&quot; so there can&apos;t be any sort of blanket &quot;data&quot; is always required validation. &lt;/p&gt;

&lt;p&gt;And if just merely altering the behavior of the &quot;failCommand&quot; failpoint is insufficient, the I suppose the only the only valuable solution would be to implement complete per-failpoint validation in configureFailpoint.&lt;/p&gt;

&lt;p&gt;Unless you disagree with this assessment, you or I should update this ticket to be a feature request for such an implementation.&lt;/p&gt;</comment>
                            <comment id="2214345" author="oleg.pudeyev" created="Mon, 15 Apr 2019 21:47:25 +0000"  >&lt;p&gt;I think having proper validation of fail point parameters would be ideal, since from the drivers&apos; perspective fail points are as much a part of the server&apos;s functionality as any of the &quot;normal&quot; commands. Drivers are increasing their use of fail points over time, thus providing diagnostics when fail points are not used correctly would save time for all driver engineers.&lt;/p&gt;

&lt;p&gt;With that, if the data parameter is stated to be required, perhaps simply adding validation to that effect would be sufficient for now? Even this simple change would help in the following cases in addition to the example given earlier:&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;ruby-driver-rs:PRIMARY&amp;gt; db.runCommand({configureFailPoint: &apos;failCommand&apos;,mode:{times:1},failCommands:[&apos;insert&apos;]})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/div&gt;
&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;ruby-driver-rs:PRIMARY&amp;gt; db.runCommand({configureFailPoint: &apos;failCommand&apos;,mode:{times:1,data:{failCommands:[&apos;insert&apos;],errorCode:101}}})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;I can see how altering the fail command fail point to always fail if, say, error code is not provided can create a different set of issues, therefore I think if additional validation is added it should be done when a fail point is set rather than when an operation is performed and the fail point is checked.&lt;/p&gt;</comment>
                            <comment id="2214303" author="gabriel.russell" created="Mon, 15 Apr 2019 21:18:13 +0000"  >&lt;p&gt;Oleg, at first glance it looks to me that there is no failpoint specific validation that occurs in configureFailPoint .  And there doesn&apos;t really seem to be must validation in any of the failpoint implementations I looked at just now. The few that I looked all all looked to be pretty flexible with their inputs. While the wiki does say that the data element is required, that doesn&apos;t seem to be enforced by code. &lt;/p&gt;

&lt;p&gt;Do you have any specific example of a failpoint validating its parameters?&lt;/p&gt;

&lt;p&gt;The data element of the configureFailPoint command is, in code and comments, explicitly optional. There may be existing failpoints that don&apos;t require data, and if there are not now, there could be in the future.&lt;/p&gt;

&lt;p&gt;I could alter the functionality of the &apos;failCommand&quot; fail point so that it fails all commands when it doesn&apos;t have a data element or a contained  failCommands element. I don&apos;t know if this is really useful ( otherwise someone probably would have done it already ) or worthwhile.&lt;/p&gt;

&lt;p&gt;Lastly we could heavily alter the implementation of configureFailPoint and of fail points in general and implement per fail point validation of configureFailPoint parameters.&lt;/p&gt;

&lt;p&gt;Which one of these ideas, if any, is closest to what you had in mind?&lt;/p&gt;
</comment>
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