Crashes on updates of collection that is reactively queries

[yeputons]

Gist. Create a project, remove insecure and autosubscribe packages, open localhost. Try updating the only 'A' element with something. New value will blink for a moment and then server gives an error:

=> Meteor server running on: http://localhost:3000/
I20140203-12:25:46.245(4)? tryit
=> Meteor server restarted
I20140203-12:25:58.984(4)? tryit
I20140203-12:25:58.994(4)? as= [ { bId: '5yprikWWpzcd9d5aA', _id: 'ZrP9qLgnf6iMEYiJp' } ]
I20140203-12:26:41.527(4)? Exception in queued task: Error: Could not find element with id ZrP9qLgnf6iMEYiJp to change
I20140203-12:26:41.530(4)?     at _.extend.changed (packages/livedata/livedata_server.js:176)
I20140203-12:26:41.533(4)?     at _.extend.changed (packages/livedata/livedata_server.js:364)
I20140203-12:26:41.535(4)?     at _.extend.changed (packages/livedata/livedata_server.js:964)
I20140203-12:26:41.538(4)?     at cursor.observeChanges.changed (packages/reactive-publish\lib\reactive-publish.coffee:96:7)
I20140203-12:26:41.541(4)?     at packages/mongo-livedata/observe_multiplex.js:159
I20140203-12:26:41.543(4)?     at Array.forEach (native)
I20140203-12:26:41.546(4)?     at Function._.each._.forEach (packages/underscore/underscore.js:79)
I20140203-12:26:41.548(4)?     at Object.task (packages/mongo-livedata/observe_multiplex.js:153)
I20140203-12:26:41.550(4)?     at _.extend._run (packages/meteor/fiber_helpers.js:150)
I20140203-12:26:41.553(4)?     at packages/meteor/fiber_helpers.js:128
I20140203-12:26:42.425(4)? Exception in queued task: Error: Could not find element with id ZrP9qLgnf6iMEYiJp to change
I20140203-12:26:42.444(4)?     at _.extend.changed (packages/livedata/livedata_server.js:176)
I20140203-12:26:42.445(4)?     at _.extend.changed (packages/livedata/livedata_server.js:364)
I20140203-12:26:42.455(4)?     at _.extend.changed (packages/livedata/livedata_server.js:964)
I20140203-12:26:42.457(4)?     at cursor.observeChanges.changed (packages/reactive-publish\lib\reactive-publish.coffee:96:7)
I20140203-12:26:42.460(4)?     at packages/mongo-livedata/observe_multiplex.js:159
I20140203-12:26:42.463(4)?     at Array.forEach (native)
I20140203-12:26:42.466(4)?     at Function._.each._.forEach (packages/underscore/underscore.js:79)
I20140203-12:26:42.469(4)?     at Object.task (packages/mongo-livedata/observe_multiplex.js:153)
I20140203-12:26:42.470(4)?     at _.extend._run (packages/meteor/fiber_helpers.js:150)
I20140203-12:26:42.473(4)?     at packages/meteor/fiber_helpers.js:128I20140203-12:28:05.054(4)? tryit
I20140203-12:28:05.056(4)? as= [ { _id: 'ZrP9qLgnf6iMEYiJp', bId: '5yprikWWpzcd9d5aA' } ]

I have reactive: true option commented here, because if I uncomment it, server hangs after writing tryit to log. If I replace reactivePublish by publish, everything except reactive update of 'B's works fine.

[Diggsey]

Fixed in 59b571339f663382f560abd1e8f2ddd9ac9498f8, thanks for helping me iron out these bugs!

[yeputons]

@Diggsey unfortunatelly, my example still does not work ewith reactivePublish and {reactive:true} even without updates - server hangs on find({}, {reactive:true}).fetch(). But if I replace it with findOne({}, {reactive:true}), everything works OK (except that I get only one item from collection 'A')

[Diggsey]

Seems to be a problem with oplog tailing, for now you can fix it by adding "limit: [some sufficiently large number]" to the find options until I find an actual solution.

[Diggsey]

Well, it turned out to be an easier fix than I expected so enjoy! (v0.1.4)

[yeputons]

Cool, thank you. One more issue, btw: #3 :)