HPE RMC and Concurrent discovery limit of 16 reached for StoreOnce

[TechEvangelist]

Hi Community Members,

We have following setup in our organization to replicate 3PAR VVOL to  HPE StoreOnce 5660 via RMC 6.3.9-2149.2.

We have Copy Policies applied to 18 distinct VVOLs inside RMC . We have a 18 volume sets for each VVOL imported into RMC via 3PAR. Previously,  They would start every Wednesday at 19:00 for a snapshot and every Thursday at 19:00 for express protect. Then, we came across this error during Create Express Protect 

Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
Backup operation failed.
Error Code RMC - 4008
Message Failed to attach resource to the data mover.
Details Failed to attach snapshot(s)to StoreOnce data mover storeonce.domain.com with error: Volume 'rmc-0017879-ro-220609200008981' could not be found..

I then staggered the execution of express protect of 17th and 18th volume set an hour later i.e. 20:00 every Thursday instead of 19:00 same day.  Again , there is same error;

2022-06-09 20:00:17 - Initiating backup.
2022-06-09 20:00:21 - Starting NATIVE backup with source connectivity: FC
2022-06-09 20:00:21 - Submitting backup job to discovery queue.
2022-06-09 20:01:22 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-09 21:00:23 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-09 22:00:24 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-09 23:00:25 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-10 00:00:27 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-10 01:00:28 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-10 02:00:29 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-10 03:00:30 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-10 04:00:31 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-10 05:00:32 - Concurrent discovery limit of 16 reached for StoreOnce. Waiting for a copy to finish.
2022-06-10 05:12:07 - Backup operation failed.

I have one catalyst store on Storeonce side for all volume sets in RMC.  

Does anyone come across this issue before? 

[support_s]

System recommended content:

1. HPE Recovery Manager Central (RMC) 6.3.9 Release Notes and Documentation Errata | Limitations in RMC 6.3.9

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[TechEvangelist]

I could not obtain infomration relevant to address my issue from your hyperlink.

I assume that following information might be relevant. There is a hard limit of 16 volumes in paralell that can be backed up to StoreOnce.

Document - HPE Recovery Manager Central Software - Specifications | HPE Support

[sbhat09 · Accepted solution]

Hello @TechEvangelist,

That is the automated system recommendation. Please ignore if the hyperlinks are not relevant.

The link you posted is correct. I think you found the reason for that error. Please let me know if you need any more assistance.

Regards,
Srinivas Bhat

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