Event ID 1026, Event ID 3551, Event ID 1000 on SharePoint application server.

Or, SharePoint Central admin IIS application pool getting stopped automatically...

Errors:

1. Faulting application name: hostcontrollerservice.exe, version: 15.0.4420.1017, time stamp: 0x50672c2d Faulting module name: KERNELBASE.dll, version: 6.3.9600.17055, time stamp: 0x532954fb Exception code: 0xe0434352 Fault offset: 0x0000000000005bf8 Faulting process id: 0xd44 Faulting application start time: 0x01cfcb471850b6f5 Faulting application path: C:\Program Files\Microsoft Office Servers\15.0\Search\HostController\hostcontrollerservice.exe

Faulting module path: C:\Windows\system32\KERNELBASE.dll

Report Id: 56be61a3-373a-11e4-80ef-06a3adca6e46

2. SQL database login for 'SharePoint_Config' on instance 'epmdbsrv' failed. Additional error information from SQL Server is included below.

3. The process was terminated due to an unhandled exception.

Exception Info: System.Collections.Generic.KeyNotFoundException

Solutions: I applied following fixes to resolve this issue.

On DB Server:

SQL rights “SharePoint Admin Content Database” under security\users section corrected. Assigned rights on WSS_Content_Application_pool and other SharePoint related memberships to SharePoint user. Do the same things for other DBs related to SharePoint Server.

On Application Server:

Granted full rights to SharePoint user account on C:\Program Files\Microsoft Office Servers\15.0\Config folder.

Granted full rights to SharePoint user account on registry Path: computer\hkey_local_machine\Software\classes\appID\{61738644-F196-11D0-9953-00C04FD919C1}

Make sure SharePoint user is having rights in “Log on as service” and “Log on as a batch job” in group policy on local computer or in GPO if applicable.

Cheers, Please write me back if you have any