Two jobs that never shall build if the other one builds

[tps800]

Hi!

I'm having two jobs each one depends on the other and shall never build while the other one builds. Both are independend of each other except they are using the result of each:

- cmake blocks building of llvm

- llvm blocks building of cmake

I've entered cmake as blocker in llvm, and llvm as blocker in cmake. Worked fine, until I managed to set jenkins up to compile FreeBSD_{8,9,10,current} -- really long lasting jobs taking from 3 to 7 hours to finish. Now I ended up with cmake *and* llvm in the job queue. No problem so far I thought, but: both do not run, because cmake is annotated as being blocked by llvm and llvm is being blocked by cmake.

Is this a bug with "Build Blocker Plugin" (https://wiki.jenkins-ci.org/display/JENKINS/Build+Blocker+Plugin) or is this intentional. I interpreted "[...] blocking jobs by their names in the list of currently running builds [...]" as only considering running builds, not builds which are in the queue to be run. In this case this would be a bug within this plugin.

-- 

Thomas

[Baptiste Mathus]

Better use the throttle concurrent build plugin IMO. Works fine for us:

Define a central token. Then configure both job to "acquire" it when starting. Done. Both jobs won't run at the same time.

Cheers

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[tps800]

Yes, this is a bug within "Build Blocker Plugin". It takes the queue and running jobs into account, fastly leading to a deadlock if all slots are occupied. "Build Blocker Plugin" would only have to take RUNNING jobs into account, ignoring queued jobs.

Any idea where to put this bug report for "Build Blocker Plugin"?

-- 

Thomas

[tps800]

On Tuesday, May 19, 2015 at 5:58:12 PM UTC+2, Baptiste Mathus wrote:

Better use the throttle concurrent build plugin IMO. Works fine for us:

Define a central token. Then configure both job to "acquire" it when starting. Done. Both jobs won't run at the same time.

This plugin isn't as easy to handle (you've to create a central token) but works as expected, not creating a deadlock if both jobs are queued, but not running, because of all slots occupied.

-- 

Thomas

[Baptiste Mathus]

Le 21 mai 2015 8:59 AM, "tps800" <t...@vr-web.de> a écrit :
>
> On Tuesday, May 19, 2015 at 5:58:12 PM UTC+2, Baptiste Mathus wrote:
>>
>> Better use the throttle concurrent build plugin IMO. Works fine for us:
>>
>> Define a central token. Then configure both job to "acquire" it when starting. Done. Both jobs won't run at the same time.
>
> This plugin isn't as easy to handle (you've to create a central token)

Yes that's indeed the only impediment we have identified with this plugin: requiring to be admin to create a token is overkill.

We (software factory admins) would like to propose an improvement PR about this, but not top priority at the moment...

Cheers
-- Baptiste

[Marcus Semblano]

Would Locks and Latches (https://wiki.jenkins-ci.org/display/JENKINS/Locks+and+Latches+plugin) work for you?

Marcus Semblano

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[Baptiste Mathus]

The thing is: Locks & Latches is subject to deprecation, and Throttle Concurrent Builds is recommended as an alternative.

Cheers

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Baptiste <Batmat> MATHUS - http://batmat.net
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