Hi, Ashic, 

this is expected for the latest released version 

However, workers should be able to re-register since 1.2, since this patch 
https://github.com/apache/spark/pull/2828 was merged

Best, 

-- 
Nan Zhu


On Tuesday, November 4, 2014 at 6:00 PM, Ashic Mahtab wrote:

> Hi,
> I've set up a standalone Spark master (no failover or file recovery 
> specified), and brought up a few worker nodes. All of them registered and 
> were shown in the master web UI. I then stopped and started the master 
> service (the workers were still running). After the master started up, I 
> checked the web UI and none of the workers were registered. I then stopped 
> and started each worker and they registered with the master again.
> 
> My question is - is this expected? Is there a timeout after which the worker 
> would have rejoined the master? Or is the only way to ensure workers rejoin 
> is to run master failover  or file based recovery for the master?
> 
> Thanks,
> Ashic.
> 
> 
> 


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