Displaying #cassandra-dev/2017-08-30.log:

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Wed Aug 30 12:06:40 2017  gaYak:I feel stupid, but I can't explain this.. I have a table with a cell (blob type). If I store a blob there with 885 bytes, it takes ~1,2ms (localhost) to request that partition. If it's 1794 bytes, it only takes 0,1ms. Both have single cell per partition.
Wed Aug 30 12:06:46 2017  gaYak:Why is requesting less data slower?
Wed Aug 30 12:07:00 2017  gaYak:I repeated this test on my VM hundreds of thousands of times
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Wed Aug 30 13:07:36 2017  jasobrown:has anyone else seen this recently when running dtests on the apache jenkins:
Wed Aug 30 13:07:39 2017  jasobrown:Building C* version github:apache/cassandra-2.2 failed. Attempted to delete /home/jenkins/.ccm/repository/githubCOLONapacheSLASHcassandra-2.2 but failed. This will need to be manually deleted
Wed Aug 30 13:15:41 2017  marcuse:yeah, but no idea how to fix
Wed Aug 30 13:40:17 2017  jasobrown:exlt: any thoughts? ftr, i've had this happen, as well, when i run some dtests locally
Wed Aug 30 13:40:52 2017  jasobrown:i do the obvious delete the directory, and the test runs, but then it comes back later
Wed Aug 30 13:41:08 2017  jasobrown:(and causes problems)
Wed Aug 30 13:41:42 2017  jasobrown:i'm suspecting i should open a jira to track this ...
Wed Aug 30 13:44:57 2017  exlt:hmm.. I don't recall seeing that happen, but will see if I can come up with some sort of sane cleanup - we don't want to rm while a job is running, so will need to block on other jobs
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Wed Aug 30 13:49:02 2017  exlt:we clean the workspace at the beginning of all the jobs, and the jobs already block, so I think we can add a ~/.ccm/* cleanup, then proceed
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Wed Aug 30 13:55:08 2017  iamaleksey:should we replace instances of 'github:apache/cassandra-2.2' with 'git:cassandra-2.2' maybe?
Wed Aug 30 13:55:13 2017  iamaleksey:or are they equivalent?
Wed Aug 30 13:56:15 2017  jasobrown:exlt: sounds good!
Wed Aug 30 13:56:33 2017  iamaleksey:I don't know why it started failing recently tbh. The commit I committed only added two new tests, but the existing ones started failing too
Wed Aug 30 13:56:35 2017  jasobrown:i'm happy to be a reviewer if you need
Wed Aug 30 13:56:44 2017  iamaleksey:all using the same version name string
Wed Aug 30 13:56:59 2017  jasobrown:iamaleksey: i've been seeing this for over a month or so now
Wed Aug 30 13:57:06 2017  iamaleksey:ah. ok then
Wed Aug 30 13:57:19 2017  jasobrown:iamaleksey: so not you :)
Wed Aug 30 13:59:41 2017  iamaleksey:there is also this
Wed Aug 30 13:59:41 2017  iamaleksey:repository: INFO: Cloning into bare repository '/home/jenkins/.ccm/repository/_git_cache_apache'...
Wed Aug 30 13:59:41 2017  iamaleksey:Host key verification failed.
Wed Aug 30 13:59:41 2017  iamaleksey:fatal: Could not read from remote repository.
Wed Aug 30 14:06:57 2017  exlt:jasobrown: here's what I'm thinking - everywhere we `git clean` already, I'm just adding an `rm -rf $HOME/.ccm/*` - https://paste.fscking.us/display/ZthKGJINkWNZ8-4Ayle5_U0zFi8
Wed Aug 30 14:08:34 2017  ptnapoleon:We replaced git with github so that we would clone from github instead of the asf repo, because of complaints that we were hitting that repo too often
Wed Aug 30 14:09:30 2017  iamaleksey:ah. fair enough. should we replace it everywhere else in code? I see a few occurances of git: still in
Wed Aug 30 14:09:30 2017  jasobrown:lgtm - nit: maybe create a variable for CCM_HOME instead of baking in $HOME/.ccm everywhere?
Wed Aug 30 14:09:55 2017  exlt:are we doing a git+ssh clone, though? host key check makes me think we're using ssh, and we should probably do http
Wed Aug 30 14:10:06 2017  ptnapoleon:I have repeatedly replaced it everywhere, so I assume people just keep putting it back in, or adding new tests that use it
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Wed Aug 30 14:52:22 2017  iamaleksey:ptnapoleon: might want to do it again
Wed Aug 30 14:52:44 2017  iamaleksey:though it's mostly in upgrade tests now
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Wed Aug 30 15:38:26 2017  exlt:it looks like ccm will grok an env for `CCM_CONFIG_DIR`, so I'm thinking that setting `CCM_CONFIG_DIR=$WORKSPACE/.ccm` might be a better idea, since it will automatically get cleaned up then started fresh each run
Wed Aug 30 15:38:55 2017  exlt:ptnapoleon: does that sound about right?
Wed Aug 30 15:39:40 2017  exlt:`WORKSPACE` is a jenkins-specific env var for the local build dir for each run, for those that aren't familiar
Wed Aug 30 15:52:51 2017  exlt:CCM_CONFIG_DIR patch thought: https://paste.fscking.us/display/R3ynJyLElslSA04k9loyUUiJovc
Wed Aug 30 15:53:03 2017  exlt:this makes more sense to me
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Wed Aug 30 16:02:43 2017  exlt:committed. should be live in a few minutes
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Wed Aug 30 16:10:54 2017  jasobrown:exlt: nice work - i'm gonna kick off some jobs today, so i'll monitor for this change
Wed Aug 30 16:10:55 2017  jasobrown:thanks!
Wed Aug 30 16:11:32 2017  exlt:yeah, that should help for cleanliness, but I'm still trying to find where we're doing git+ssh and not https://github.com/...
Wed Aug 30 16:11:57 2017  exlt:that `Host key verification failed.` is an ssh key error, I'm pretty certain
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Wed Aug 30 21:45:15 2017  jeffj:exlt: cassandra12 looks sick (https://builds.apache.org/computer/cassandra12/log), any way to remove it from the dtest set?
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Wed Aug 30 21:55:46 2017  driftx:he's out the rest of the week, btw
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Wed Aug 30 21:58:34 2017  jeffj::(
Wed Aug 30 21:59:35 2017  driftx:not today, though, afaik
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Wed Aug 30 22:15:20 2017  exlt:(was picking up daughter from school..) that's one of krut's boxes, if it just needs a reboot, but INFRA owns all the slaves - they have root, if there's some software missing, etc
Wed Aug 30 22:16:03 2017  exlt:removing it from the slave label would also be INFRA
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Wed Aug 30 22:17:10 2017  exlt:wonder if a reboot, which should clean out /tmp would solve that, or if there's something else filling the disk
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Wed Aug 30 22:20:26 2017  exlt:https://issues.apache.org/jira/browse/INFRA-14992
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Wed Aug 30 22:21:04 2017  exlt:and I am out tomorrow-Tuesday :)
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Wed Aug 30 22:21:33 2017  driftx:I checked the calendar when you didn't respond :)
Wed Aug 30 22:22:18 2017  exlt:yeah, not going to reply when driving - that's illegal (and stupid)
Wed Aug 30 22:22:53 2017  exlt:looked to see if I can edit the label, and I don't appear to have that power
Wed Aug 30 22:23:16 2017  driftx:I don't even look at my phone if it goes off when I'm driving, whatever it is, can wait. I'm operating heavy machinery here.
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Wed Aug 30 22:38:46 2017  exlt:evidently, the slaves krut added have 40G disks, so there's little free space to work with - INFRA says /home/jenkins is ~15G, there are ~13G of dependencies + OS, so only about 7GB of workspace to use
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Wed Aug 30 22:40:13 2017  exlt:pretty sure cassandra1-8 are 240G SSDs
Wed Aug 30 22:41:41 2017  exlt:cassandra1-7 ^
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