Error Message

Set-IndexLocationBackupMode : Unable to notify the indexing service on computer 'EVserver' of backup mode changes for index locations.

Event ID:  40966
Task Category:  Index Admin Service
Level: Error
Description: A program fault has raised an exception.
Exception: Failed Index Volume => Id: 3 Error: Indexing engine unreachable.

Diagnostic:
Type: System.Exception
Reference: An error occurred while invoking Void b__8().
Error Context : Handling index location backup mode change notification for IndexServiceEntryId 1AEC1C7046560B94BB5B469E3D91306B91710000EVserver1

Command Line: "C:\Program Files (x86)\Enterprise Vault\EVIndexAdminService.exe" -EntryID:1AEC1C7046560B94BB5B469E3D91306B91710000EVserver1
Application Domain: EVIndexAdminService.exe
Process Id: 5848 / Thread Id: 5824
Stack Trace:    at Symantec.EnterpriseVault.Indexing.Admin.EVIndexAdminUtils.InvokeHelper(Action act, String context, Boolean rethrow, Boolean shutdownCheck)
   at Symantec.EnterpriseVault.Indexing.Admin.IndexAdminCOM.ChangeIndexServiceBackupModeInternal(String indexServiceEntryId, Boolean wait)
   at Symantec.EnterpriseVault.Indexing.Admin.IndexAdminCOM.<>c__DisplayClassa.b__8()
   at Symantec.EnterpriseVault.Indexing.Admin.EVIndexAdminUtils.InvokeHelper(Action act, String context, Boolean rethrow, Boolean shutdownCheck)
V-437-40966
 

To validate if this is the issue a DTRACE is needed, please perform the following steps on the EV server that has generated Event ID 40966 while re-creating the issue.

• DTRACE the process EVIndexAdminService for no less than 5 minutes while re-creating the issue.
• Open the log file created and search for either of the following the strings:
   

[4228] (EVIndexAdminService) <2616> EV-H {INDEXADMINCOM.EN_US} Exception: Failed Index Volume => Id: 3 Error: Indexing engine unreachable.| Info: Diag: Type:System.Exception ST: Inner:None
[4228] (EVIndexAdminService) <2616> EV~E |Event ID: 40966 A program fault has raised an exception.|Exception: Failed Index Volume => Id: 3 Error: Indexing engine unreachable.|Diagnostic: |Type: System.Exception|Reference: An error occurred while invoking Void b__29().|Error Context : Change backup mode. IndexLocation: D:\EVIndexes\index2, BackupMode: True |Command Line: "C:\Program Files (x86)\Enterprise Vault\EVIndexAdminService.exe" -EntryID:1AEC1C7046560B94BB5B469E3D91306B91710000EVserver1|Application Domain: EVIndexAdminService.exe|Process Id: 4228|Thread Id: 2616|Stack Trace: at Symantec.EnterpriseVault.Indexing.Admin.EVIndexAdminUtils.ThrowExceptionIfNeeded(String IndexVolumesXml)| at Symantec.EnterpriseVault.Indexing.Admin.IndexAdminCOM.NotifyIVPForIndexVolumeAccessMode(String xmlIndexVolumeIDs, IndexingAccess accessMode)| at Symantec.EnterpriseVault.Indexing.Admin.IndexAdminCOM.ChangeIndexLocationBackupModeInternal(String indexLocationEntryId, Boolean inBackMode, Boolean logEvent)| at Symantec.EnterpriseVault.Indexing.Admin.EVIndexAdminUtils.InvokeHelper(Action act, String context, Boolean rethrow, Boolean shutdownCheck)

Corrupt index volume caused the Error: Indexing engine unreachable.

1. Run the SQL query below against the EnterpriseVaultDirectory database to identify the corrupt index volume (Id: 3)

Select A.ArchiveName, IRPE.IndexRootPath, IV.FolderName
From IndexVolume IV
INNER JOIN IndexRootPathEntry IRPE
ON IRPE.IndexRootPathEntryId = IV.IndexRootPathEntryId
INNER JOIN Archive A
ON A.RootIdentity = IV.RootIdentity
AND IV.RootIdentity = A.RootIdentity
Where IV.IndexVolumeIdentity = 3

Sample of the result:

ArchiveName      IndexRootPath             FolderName
TestArchive         G:\EVIndex\index3      1683A6B681B086C4AB671A9B39A0EAB8B_3

2. Rebuild the affected volume

Note: The volume will most likely show as "Normal" in the Index Volume Browser