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https://issues.apache.org/jira/browse/COUCHDB-3402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15995335#comment-15995335
]
ASF subversion and git services commented on COUCHDB-3402:
----------------------------------------------------------
Commit 81ee7c5ac71e617a03e967b4fc5d0358f4ba9459 in couchdb's branch
refs/heads/COUCHDB-3298-optimize-writing-kv-nodes from [~wohali]
[ https://gitbox.apache.org/repos/asf?p=couchdb.git;h=81ee7c5 ]
Fix error on race condition in mem3 startup
During mem3 startup, 2 paths attempt to call `couch_server:create/2` on
`_dbs`:
```
gen_server:init_it/6
-> mem3_shards:init/1
-> mem3_shards:get_update_seq/0
-> couch_server:create/2
```
and
```
mem3_sync:initial_sync/1
-> mem3_shards:fold/2
-> couch_server:create/2
```
Normally, the first path completes before the second. If the second path
finishes first, the first path fails because it does not expect a
`file_exists` response.
This patch makes `mem3_util:ensure_enxists/1` more robust in the face of
a race to create `_dbs`.
Fixes COUCHDB-3402.
Approved by @davisp and @iilyak
> JS: dev/run timing out starting up nodes
> ----------------------------------------
>
> Key: COUCHDB-3402
> URL: https://issues.apache.org/jira/browse/COUCHDB-3402
> Project: CouchDB
> Issue Type: Bug
> Components: Test Suite
> Reporter: Joan Touzet
> Assignee: Joan Touzet
> Priority: Critical
>
> Seen this a bunch of times recently in the Jenkins infrastructure. May be a
> symptom of ASF Jenkins nodes being overloaded.
> {noformat}
> make[1]: Entering directory `/usr/src/couchdb/apache-couchdb-2.0.0-28dd801'
> # This might help with emfile errors during `make javascript`: ulimit -n 10240
> Failed to start all the nodes. Check the dev/logs/*.log for errors.
> make[1]: *** [javascript] Error 1
> make[1]: Leaving directory `/usr/src/couchdb/apache-couchdb-2.0.0-28dd801'
> make: *** [check] Error 2
> {noformat}
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