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POmongodb dies on regex search
 

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  1. POmongodb dies on regex search
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    <p>Simple regex search:</p> <pre><code>&gt; db.lipsum.find({"d.text":{$regex:'cursus'}}); </code></pre> <p>does well, and returns many thousands. </p> <p>A bit more complex one:</p> <pre><code>db.lipsum.find({"d.text":{$regex:'cursus((?!turpis massa).)*$'}}); </code></pre> <p>kills the mongod:</p> <pre><code>Tue Nov 26 11:01:03 DBClientCursor::init call() failed Tue Nov 26 11:01:03 query failed : lipsum.lipsum { d.text: { $regex: "cursus((?!turpis massa).)*$" } } to: 127.0.0.1:27017 Error: error doing query: failed Tue Nov 26 11:01:03 trying reconnect to 127.0.0.1:27017 Tue Nov 26 11:01:03 reconnect 127.0.0.1:27017 failed couldn't connect to server 127.0.0.1:27017 </code></pre> <p>There is nothing in mongodb.log. The last lines are:</p> <pre><code>Tue Nov 26 11:00:17 [conn2] query lipsum.lipsum query: { d.text: { $regex: "cursus" } } cursorid:5200338523215960499 ntoreturn:0 keyUpdates:0 locks(micros) r:1266 nreturned:101 reslen:159838 1ms Tue Nov 26 11:00:18 [conn2] run command admin.$cmd { replSetGetStatus: 1.0, forShell: 1.0 } Tue Nov 26 11:00:18 [conn2] command admin.$cmd command: { replSetGetStatus: 1.0, forShell: 1.0 } ntoreturn:1 keyUpdates:0 reslen:76 0ms </code></pre> <p>So there are 2 questions:</p> <ol> <li>How to get detailed information what happened ? </li> <li>How to write correct regex to fetch objects that have no "turpis massa" after "cursus"?</li> </ol> <hr> <p>Mongodb 2.2.4, Ubuntu 13.04.</p> <p>My testing db:</p> <pre><code>load("lorem.js"); // from https://github.com/f/loremjs var lorem = new Lorem; lorem.type = Lorem.TEXT; lorem.query = '2p'; for(var i=0; i &lt; 20000; i++){ db.lipsum.insert({t: $currentDate, d: {text:lorem.createLorem()}}) } </code></pre>
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    1. USAlex Blex
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      1. VTUpMod
    1. COCould you try the same query with the current version of MongoDb?
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      1. USWiredPrairie
    2. CO@WiredPrairie Yes, it works with 2.4.5 and 2.4.8 on a vagrant box.
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      1. USAlex Blex
    3. COSeems like a a bug was fixed between versions.
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      1. USWiredPrairie
 

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