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POMeteor, Error: Can't wait without a fiber using Meteor.setTimeout() on the server
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  1. POMeteor, Error: Can't wait without a fiber using Meteor.setTimeout() on the server
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    copied!<p>I'm fairly new to Meteor so I might be missing a key insight here. </p> <p>Anyway, I want to indicate to users how many other users is on the site at the same time. I have an <code>AuditItems</code> collection already that stores kv-pairs for <code>who</code>, <code>when</code> and <code>what</code> that I can use for this type of computation. My <code>Collections</code> query is run with a <code>new Date()</code> parameter so I can't just observe the results, I have to rerun the query periodically.</p> <p>I then <em>made</em> it reactive by calling <code>changed</code> on a <code>Deps.Dependency</code>. </p> <p>Here is the code:</p> <pre><code> // publishing counts of the users that are logged on // at the moment Meteor.publish("user-activity", function () { var self = this; self.added("user-activity", "all-recent-activity", {'operations': getRecentActivityCountsCache}); self.ready(); Deps.autorun(function() { self.changed("user-activity", "all-recent-activity", {'operations': getRecentActivityCounts()}); }); }); var getRecentActiveCountsDependency = new Deps.Dependency; var getRecentActivityCountsCache = 0; var getRecentActivityCounts = function() { // register dependency with the caller getRecentActiveCountsDependency.depend(); var now = new Date(); var aWhileAgo = new Date(now.valueOf() - (5 * 60 * 1000)); // 5 minutes auditItems = AuditItems.find({'when': { '$gt': aWhileAgo }}).fetch(); console.log('raw data: ' + JSON.stringify(auditItems)); getRecentActivityCountsCache = _.chain(auditItems) .groupBy('who') .keys() .size() .value(); console.log('new count: ' + getRecentActivityCountsCache); return getRecentActivityCountsCache; }; Meteor.setTimeout(function() { getRecentActiveCountsDependency.changed(); }, 60 * 1000); // 60 seconds </code></pre> <p>I am getting this error on the console the first time the timer fires:</p> <pre><code> Exception from Deps recompute: Error: Can't wait without a fiber at Function.wait (/home/vagrant/.meteor/tools/3cba50c44a/lib/node_modules/fibers/future.js:83:9) at Object.Future.wait (/home/vagrant/.meteor/tools/3cba50c44a/lib/node_modules/fibers/future.js:325:10) at _.extend._nextObject (packages/mongo-livedata/mongo_driver.js:540) at _.extend.forEach (packages/mongo-livedata/mongo_driver.js:570) at _.extend.map (packages/mongo-livedata/mongo_driver.js:582) at _.extend.fetch (packages/mongo-livedata/mongo_driver.js:606) at _.each.Cursor.(anonymous function) [as fetch] (packages/mongo-livedata/mongo_driver.js:444) at getRecentActivityCounts (app/server/server.js:26:70) at null._func (app/server/server.js:12:79) at _.extend._compute (packages/deps/deps.js:129) </code></pre>
 

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