The bulk_shard_insert.js test occasionally fails with an incorrectly filtered out chunk. The error is:
[js_test:bulk_shard_insert] 2016-09-19T16:19:49.431+0000 d23510| 2016-09-19T16:19:49.431+0000 I SHARDING [RangeDeleter] rangeDeleter deleted 2688 documents for bulk_shard_insert.coll from { _id: ObjectId('57e00dcc2e653cab51d68e90') } -> { _id: ObjectId('57e00dd62e653cab51d69910') } [js_test:bulk_shard_insert] 2016-09-19T16:19:49.484+0000 Inserted 1000000 count : 1000000 itcount : 999999 [js_test:bulk_shard_insert] 2016-09-19T16:19:49.485+0000 assert: [1000000] != [999999] are not equal : undefined [js_test:bulk_shard_insert] 2016-09-19T16:19:49.485+0000 doassert@src/mongo/shell/assert.js:15:14 [js_test:bulk_shard_insert] 2016-09-19T16:19:49.485+0000 assert.eq@src/mongo/shell/assert.js:51:5 [js_test:bulk_shard_insert] 2016-09-19T16:19:49.485+0000 @jstests/sharding/bulk_shard_insert.js:69:5 [js_test:bulk_shard_insert] 2016-09-19T16:19:49.485+0000 @jstests/sharding/bulk_shard_insert.js:3:2
Add some additional diagnostics to help trace this error.