RecoverPoint: Unity Splitter Uncontrollable

Summary: Unity Splitter Uncontrollable

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Symptoms

 

  • Unity Splitter uncontrollable showing uncontrollable in the RecoverPoint UI
  • Consistency Group in error state no source copy in the Consistency Group
  • DRU (data replication unavailable)


Summary:

If RecoverPoint Appliance (RPA) has not been able to communicate with one of the splitters for the past five minutes, Consistency Group transfer pauses.
This is done to ensure consistency between the copy and production.
When the consistency groups restart transfer after the communication is reestablished, an initialization or full sweep will follow, depending on the reason for the miscommunication.

Splitter logs:
2016/11/04 23:28:20.815 - #0 - 3518809856/14137 - SplitterController_Windows: basicIoctlToControlDev: ioctl failed to splitter control cmd=0x800029e0 error # 0
2016/11/04 23:28:20.815 - #0 - 3518809856/14137 - SplitterController: ioctlToControlDev: ioctl failed to splitter control  cmd = -2147472928 arg = 0x960110 arg_size = 110800

Unity logs:
c4_safe_ktrace.log:2016/11/06-12:27:20.795011 596K     7F7292725702      std:RPS:#0 - rps-ctrl spl_ioctl_uspace_san_view: failed to allocate memory
c4_safe_ktrace.log:2016/11/06-12:28:05.932207 659K     7F7292725705      std:RPS:#0 - rps-ctrl spl_ioctl_uspace_san_view: failed to allocate memory
c4_safe_ktrace.log:2016/11/06-12:28:51.068783 863K     7F72926BF702      std:RPS:#0 - rps-ctrl spl_ioctl_uspace_san_view: failed to allocate memory

2016/11/08-05:09:09.005104 1.0M 7F77D46DC702 std:MemCacheAllocateUnmanagedMemory() OUT OF MEMORY for 8192 bytes!!
2016/11/08-05:09:09.005111 6 7F77D46DC702 mlu:MLU E: MluExecutiveCBFSStationaryAlloc[2492] MemCache Failed to allocate 0x2000 (8192) bytes
2016/11/08-05:09:09.005112 2 7F77D46DC702 std:MemCacheAllocateUnmanagedMemory() OUT OF MEMORY for 16384 bytes!!
2016/11/08-05:09:09.005114 2 7F77D46DC702 mlu:MLU E: MluExecutiveCBFSStationaryAlloc[2492] MemCache Failed to allocate 0x4000 (16384) bytes

Cause

UNITY Storage Processor (SP) running out of memory

Resolution

Permanent Fix:
Upgrade to Unity OE 4.1.1 which contains the fix for Kdriver crash and uncontrollable state. 

Workaround: 
An SP reboot could be used to clear this condition.
If the Unity array has NAS servers or file system, a short outage can occur while the NAS servers failover and failback during SP reboots.

If SP cannot be rebooted and the RecoverPoint splitter is uncontrollable, contact Dell Technical Support, and quote this knowledge base article ID.

 

Affected Products

RecoverPoint EX

Products

RecoverPoint, RecoverPoint EX, Dell EMC Unity Family
Article Properties
Article Number: 000046250
Article Type: Solution
Last Modified: 29 Aug 2025
Version:  6
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