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SERVER-5588
mapReduce and eval not recognized by mongosSERVER-5608
MapReduce returns incorrect timeMillis and, when verbose, timing dataSERVER-6084
Map/Reduce, emit() should not allow undefined as keySERVER-51779
Strange MapReduce issue - not working without JSON.stringifySERVER-2340
MapReduce finalize should be able to throw result row awaySERVER-5504
Allow map-reduce jobs to run on replicas, provided the output is into the "local" databaseSERVER-3241
Why does group return an empty result when no documents are matched?SERVER-3136
A MapReduce with out = {reduce: "coll"} should not have a finalize function since its output type does not match the reduce's input typeSERVER-2892
Allow MR output to different databaseSERVER-2876
system.js + ShardingSERVER-2806
fix finalize error message WAS: Database/table creation does not work from getSisterDB in sharded map/reduce (should assert?)SERVER-17215
mapReduce with 'reduce' output action fails with an massert on output collection with no _id indexSERVER-30111
Mapreduce uses global lock when outputting to empty collectionSERVER-15585
Group command does not support code with scope for the key and finalize functionsSERVER-14168
Warning logged when incremental MR collections are unsuccessfully dropped on secondariesSERVER-13928
Iteration over Map supportSERVER-12052
map-reduce froze for minutes on "Final Reduce" at 100%SERVER-11680
Add 'intersect' to mapReduce 'out' actionSERVER-11003
discrepancy on mapReduce and mapreduce commandSERVER-9357
make emit arguments mutable in MapReduce or fail if they're changedSERVER-10797
MapReduce ignores 'sharded' option when connected to mongodSERVER-8307
Use db-level lock when MapReduce input and output use a single DBSERVER-6747
Confusing error message when mapReduce() encounters invalid UTF-16 string data in collectionSERVER-13442
mapReduce nonAtomic output optionSERVER-13554
Unfriendly error message mentioning "ns"SERVER-3801
Mapreduce should yield periodically when writingSERVER-3794
Allow to access BinData binary value from MRSERVER-3352
Map-Reduce JS increment operators (++, +=1) do not workSERVER-5385
MapReduce: when using scope with a function closures are brokenSERVER-5378
Position of parameters within out {} object shouldn't matterSERVER-5349
map-reduce ignores 'value' key when outType is REDUCESERVER-5005
error message is very cryptic if the sort index of MR does not existSERVER-4549
MR: using both jsMode and inline mode does not yield any outputSERVER-4533
using a simple $group in a findSERVER-35961
Remove uninitialized count variable in MapReduce commandSERVER-42201
MR cluster command does not validate collection namespaceSERVER-463
map/reduce should use all CPU coresSERVER-508
Update map reduce collectionsSERVER-2428
Make the MR inline limits equal to general object size limitSERVER-1912
Scope is retained across mapReduce jobs in the same connectionSERVER-2167
Monitor M/R jobsSERVER-47432
Mongo Server error (MongoQueryException): Query failed with error code 13388 and error message 'Failed to run query after 10 retries :: caused by :: version mismatch detectedSERVER-48051
Temporary namespace collisions in 4.4 mixed version cluster mapReduce testsSERVER-46997
Test that $out/$merge/mapReduce with primary read preference is rejected on a secondary nodeSERVER-46795
Allow for possibility of JS interrupt in mr_bigobject_replace.jsSERVER-46562
Shard Crashes with out of memorySERVER-46518
Legacy MR shardedfinish can target a former primarySERVER-48297
mapReduce no longer returns countsSERVER-45294
mapReduce can no longer create an output collection in a sharded cluster (4.3.2)SERVER-45211
Sharded cluster fails on mapReduce with output collection when namespace does not yet exist
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