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This does not work as intended in presence of multiple clients.
Example timeline:
Client 1|Client 2|Request|Scheduler|Response
--------|--------|-------|---------|--------
Create J| |OK |Created |FAIL // Delivering response failed,
client 1 will retry after 5 seconds
|Kill J |OK |Killed |OK // Client 2 successfully killed J
Create J| |OK |Created |OK // Client 1 will conclude that it
has successfully created J while the global state has been comprimised.
- Mehrdad Nurolahzade
On April 26, 2017, 4:57 p.m., Mehrdad Nurolahzade wrote:
>
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/58768/
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>
> (Updated April 26, 2017, 4:57 p.m.)
>
>
> Review request for Aurora, David McLaughlin, Stephan Erb, and Zameer Manji.
>
>
> Bugs: AURORA-1924
> https://issues.apache.org/jira/browse/AURORA-1924
>
>
> Repository: aurora
>
>
> Description
> -------
>
> Aurora scheduler rejects a request to create a job if a job with the same key
> already exists. Aurora client exits with an error once it receives a response
> with `ResponseCode.INVALID_REQUEST` from scheduler in this case.
>
> However, an attempt to create a job with the exact same configuration and
> number of instances is essentially idempotent. Scheduler can detect this
> situation, ignore it, and signal client to treat operation as successful;
> client warns user about existing job but does not fail the operation.
>
>
> Diffs
> -----
>
> api/src/main/thrift/org/apache/aurora/gen/api.thrift
> 3749531b5412d7ca217736aa85eed8e6606225ad
>
> src/main/java/org/apache/aurora/scheduler/thrift/SchedulerThriftInterface.java
> 059fbb86a575f5b3d78a63c9a7b5a9eebb6cb3ae
> src/main/python/apache/aurora/client/cli/jobs.py
> b79ae56bee0e5692cacf1e66f4a4126b06aaffdc
>
> src/test/java/org/apache/aurora/scheduler/thrift/SchedulerThriftInterfaceTest.java
> 016859ca3bf83f64d2576b4c7109729770f9e25c
> src/test/python/apache/aurora/client/cli/test_create.py
> 3b09bb25e919bac2795ccd56bd98657b1f98690b
>
>
> Diff: https://reviews.apache.org/r/58768/diff/1/
>
>
> Testing
> -------
>
> - Manually under Vagrant
> - End to end test script
>
>
> Thanks,
>
> Mehrdad Nurolahzade
>
>
