LiveLoad gets stuck in aborts using Flag --expand_edge=false in the Dgraph Server

[MichelDiz]

Bug report

Desktop (please complete the following information):

• OS: mac os HighSierra
• Browser: Chrome Cannary
• Dgraph Version: v1.0.7 (f180344)
• RAM available: 4025MB
• Storage Type: SSD-E
• Dgraph Client: not applicable

Describe the bug
Using the flag "expand_edge" set to false, Live Load gets lots of aborts.

To Reproduce
Steps to reproduce the behavior:

./dgraph zero
./dgraph server --lru_mb 4025 --expand_edge=false
./dgraph live -c 1 -r 1million.rdf.gz -s 21million.schema -d localhost:9080 -z localhost:5080

Expected behavior
A warning that the server is using a flag that is not compatible with LiveLoad.
Or have the (flag) option available in LiveLoad.

And it would also be interesting to know if this is expected behavior.

Logs:

Dgraph Live

Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m42s, Aborts: 7874
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m44s, Aborts: 7883
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m46s, Aborts: 7894
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m48s, Aborts: 7904
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m50s, Aborts: 7915
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m52s, Aborts: 7930
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m54s, Aborts: 7938
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m56s, Aborts: 7939
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 10m58s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m0s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m2s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m4s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m6s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m8s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m10s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m12s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m14s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m16s, Aborts: 7945
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m18s, Aborts: 7947
Total Txns done:        0 RDFs per second:       0 Time Elapsed: 11m20s, Aborts: 7949

Server

2018/08/16 20:09:14 mutation.go:141: Done schema update predicate:"_share_hash_" value_type:STRING directive:INDEX tokenizer:"exact"
2018/08/16 20:10:54 groups.go:358: Serving tablet for: performance.film
2018/08/16 20:10:54 groups.go:358: Serving tablet for: performance.actor
2018/08/16 20:10:54 groups.go:358: Serving tablet for: performance.character
2018/08/16 20:20:20 draft.go:773: Found 5 old transactions. Acting to abort them.
2018/08/16 20:20:20 draft.go:750: TryAbort 5 txns with start ts. Error: <nil>
2018/08/16 20:21:11 draft.go:776: abortOldTransactions for 5 txns. Error: <nil>
2018/08/16 20:21:20 draft.go:773: Found 230 old transactions. Acting to abort them.
2018/08/16 20:21:20 draft.go:750: TryAbort 230 txns with start ts. Error: <nil>
2018/08/16 20:21:22 draft.go:776: abortOldTransactions for 230 txns. Error: <nil>

Dgraph Zero

2018/08/16 20:09:12 zero.go:442: Connected: id:1 group_id:1 addr:"localhost:7080"
2018/08/16 20:09:39 oracle.go:92: Purged below ts:273, len(o.commits):20, len(o.rowCommit):0
2018/08/16 20:10:09 oracle.go:92: Purged below ts:610, len(o.commits):31, len(o.rowCommit):0
2018/08/16 20:10:39 oracle.go:92: Purged below ts:950, len(o.commits):31, len(o.rowCommit):0
2018/08/16 20:10:49 raft.go:467: Writing snapshot at index: 1065, applied mark: 1206
2018/08/16 20:11:09 oracle.go:92: Purged below ts:1307, len(o.commits):36, len(o.rowCommit):0
2018/08/16 20:11:39 oracle.go:92: Purged below ts:1952, len(o.commits):37, len(o.rowCommit):0
2018/08/16 20:11:49 raft.go:467: Writing snapshot at index: 2070, applied mark: 2311
2018/08/16 20:12:09 oracle.go:92: Purged below ts:2611, len(o.commits):51, len(o.rowCommit):0
2018/08/16 20:12:39 oracle.go:92: Purged below ts:3215, len(o.commits):56, len(o.rowCommit):0
2018/08/16 20:12:39 raft.go:467: Writing snapshot at index: 3333, applied mark: 3390
2018/08/16 20:13:09 oracle.go:92: Purged below ts:3944, len(o.commits):43, len(o.rowCommit):0
2018/08/16 20:13:39 oracle.go:92: Purged below ts:4602, len(o.commits):71, len(o.rowCommit):0
2018/08/16 20:13:49 raft.go:467: Writing snapshot at index: 4720, applied mark: 5033
2018/08/16 20:14:09 oracle.go:92: Purged below ts:5345, len(o.commits):57, len(o.rowCommit):0
2018/08/16 20:14:39 oracle.go:92: Purged below ts:5931, len(o.commits):138, len(o.rowCommit):0
2018/08/16 20:14:49 raft.go:467: Writing snapshot at index: 6062, applied mark: 6433
2018/08/16 20:15:09 oracle.go:92: Purged below ts:6552, len(o.commits):228, len(o.rowCommit):0
2018/08/16 20:15:39 oracle.go:92: Purged below ts:6754, len(o.commits):257, len(o.rowCommit):0
2018/08/16 20:16:09 oracle.go:92: Purged below ts:6804, len(o.commits):413, len(o.rowCommit):0
2018/08/16 20:17:09 oracle.go:92: Purged below ts:6844, len(o.commits):556, len(o.rowCommit):0
2018/08/16 20:18:09 oracle.go:92: Purged below ts:6889, len(o.commits):695, len(o.rowCommit):0
2018/08/16 20:19:39 oracle.go:92: Purged below ts:6893, len(o.commits):956, len(o.rowCommit):0
2018/08/16 20:21:09 oracle.go:92: Purged below ts:6939, len(o.commits):1012, len(o.rowCommit):0
2018/08/16 20:21:39 oracle.go:92: Purged below ts:7944, len(o.commits):7, len(o.rowCommit):0
2018/08/16 20:21:49 raft.go:467: Writing snapshot at index: 8071, applied mark: 8317

[MichelDiz]

Can be related to #2547

[manishrjain]

Should be fixed by f184b73.