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POMorphia/MongoDB: can't do getmore
 

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    <p>I'm trying to iterate over all rows ("documents"?) in my MongoDB database using Morphia. Occasionally I get the following stacktrace:</p> <pre><code>com.mongodb.MongoInternalException: can't do getmore at com.mongodb.DBApiLayer$Result._advance(DBApiLayer.java:378) at com.mongodb.DBApiLayer$Result.hasNext(DBApiLayer.java:356) at com.mongodb.DBCursor._hasNext(DBCursor.java:436) at com.mongodb.DBCursor.hasNext(DBCursor.java:456) at com.google.code.morphia.query.MorphiaIterator.hasNext(MorphiaIterator.java:40) at </code></pre> <p>In the MongoDB log file I see the following:</p> <pre><code>$ grep "cursorid not found" output.log Sun Feb 6 12:14:35 [conn13] getMore: cursorid not found App 2079575931792020691 Sun Feb 6 12:44:17 [conn19] getMore: cursorid not found App 8364953818630631317 Sun Feb 6 13:08:42 [conn20] getMore: cursorid not found App 7142256996888968009 </code></pre> <p>My code for iterating is pretty straightforward:</p> <pre><code> for (App app : datastore.createQuery(App.class).fetch()) { log.info("app: " + app.getId()); // do stuff with app } </code></pre> <p>Morphia bug? MongoDB bug? My bug?</p> <p><strong>Update:</strong></p> <p>I'm also seeing this in my glassfish logs:</p> <pre><code>[#|2011-02-16T15:39:58.029+0000|WARNING|glassfish3.0.1|com.mongodb.TRACE|_ThreadID=28;_ThreadName=Thread-1;|The log message is null. java.lang.NullPointerException at com.mongodb.DBApiLayer._cleanCursors(DBApiLayer.java:113) at com.mongodb.DBApiLayer$DBCleanerThread.run(DBApiLayer.java:494) at java.lang.Thread.run(Thread.java:662) </code></pre>
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    1. USGeorge Armhold
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