Adar Dembo has posted comments on this change.

Change subject: consensus: consolidate Raft thread pools
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Patch Set 8:

I ran raft_consensus-itest in slow mode 1000 times both against top-of-tree and 
after this change. It should be said that since the last run, 
raft_consensus-itest has gotten noticeable flakier, because I saw 14 failures 
against top-of-tree and 16 against my changes.

Here were the failure classes:
- F0611 22:54:31.148939 10821 test_workload.cc:213] Check failed: _s.ok() Bad 
status: Timed out: unable to retry before timeout: Remote error: Service 
unavailable: Timed out: could not wait for desired snapshot timestamp to be 
consistent: Tablet is lagging too much to be able to serve snapshot scan. 
Lagging by: 47923 ms, (max is 30000 ms):: Remote error: Service unavailable: 
Timed out: could not wait for desired snapshot timestamp to be consistent: 
Tablet hasn't heard from leader, or there hasn't been a stable leader for: 
2.535s secs, (max is 0.100s):
- F0611 22:49:24.987090  7271 test_workload.cc:266] Timed out: Timed out 
waiting for Table Creation
- F0611 22:49:22.728763  1226 test_workload.cc:186] Timed out: Failed to write 
batch of 1 ops to tablet 336848619f70436b935b784162bddac1 after 3 attempt(s): 
Failed to write to server: ef05c7170e544b46abe0e50fd497cbf1 
(127.0.182.2:44049): Write RPC to 127.0.182.2:44049 timed out after 60.000s 
(SENT)
- F0611 22:51:04.522655  8815 ts_itest-base.h:149] Check failed: _s.ok() Bad 
status: Timed out: GetTableLocations RPC to 127.0.0.1:52864 timed out after 
1.000s (SENT)
F0611 22:32:19.580394   181 raft_consensus-itest.cc:308] Check failed: _s.ok() 
Bad status: Illegal state: Request to resume 
'/tmp/run_tha_testGIpLRU/build/debug/bin/kudu-tserver' but the process is not 
there

I believe I saw more or less the same failures in both runs so I don't think my 
changes introduced any new kinds of failures. I have all of the logs if someone 
wants to see any of these in more detail.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I8958c607d11ac2e94908670c985059bef0ff5f54
Gerrit-PatchSet: 8
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Adar Dembo <[email protected]>
Gerrit-Reviewer: Adar Dembo <[email protected]>
Gerrit-Reviewer: Dan Burkert <[email protected]>
Gerrit-Reviewer: David Ribeiro Alves <[email protected]>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Tidy Bot
Gerrit-Reviewer: Todd Lipcon <[email protected]>
Gerrit-HasComments: No

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