Increase the value of the ThreadStackSizeKb parameter to 1024 KB in the vpxd.cfg file to resolve this issue.

• vCenter Server 5.5 or 6.0 fails immediately after starting
• The virtual machine guest operating system may fail with a blue diagnostic screen.
• In the Windows Event Viewer, under application, you see these events:

Windows Event:
Problem signature:
Problem Event Name: APPCRASH
Application Name: vpxd.exe
Application Version: 5.5.0.40799
Application Timestamp: 5307e9e2
Fault Module Name: ntdll.dll
Fault Module Version: 6.1.7601.18247
Fault Module Timestamp: 521eaf24
Exception Code: c0000005
Exception Offset: 0000000000018e5d

Log Name: Application
Source: Application Error
Date: 8/13/2015 8:20:40 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: vCenter_Server
Description:
Faulting application name: vpxd.exe, version: 0.0.0.0, time stamp: 0x55690394
Faulting module name: ntdll.dll, version: 6.3.9600.17936, time stamp: 0x55a68e0c

• In the C:\ProgramData\VMware\VMware VirtualCenter\Logs\vpxd-xx.log file, you see backtraces similar to:

[03364 info 'commonvpxLro' opID=e151ddc] [VpxLRO] -- BEGIN task-1031903 -- group-n23745 -- vim.ManagedEntity.rename -- b1131b40-7387-987a-d231-7a37f6dcc034(527b559e-a31f-c01c-16e0-3d864538a3fd)
<YYYY-MM-DD>T<time> [03364 error 'Default' opID=e151ddc] Alert:VpxTLS::GetTLS()->GetMoLockXCount() == 0@ d:/build/ob/bora-1623101/bora/vpx/common/vpxLro.cpp:3275
--> Backtrace:
--> backtrace[00] rip 000000018018b6aa
--> backtrace[01] rip 0000000180105288
--> backtrace[02] rip 000000018010668e
--> backtrace[03] rip 000000018009c567
--> backtrace[04] rip 0000000140674295
--> backtrace[05] rip 0000000140a73519
--> backtrace[06] rip 0000000000912a27
--> backtrace[07] rip 00000000004d980c
--> backtrace[08] rip 000000014069d366
--> backtrace[09] rip 00000001406757bf
--> backtrace[10] rip 0000000140679174
--> backtrace[11] rip 0000000140687874
--> backtrace[12] rip 00000001406902f5
--> backtrace[13] rip 0000000180153334</time>

<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Load: Missi
ng mapping for property hardware.device.backing.backingObjectId
<YYYY-MM-DD>T<time>[02976 warning 'utilvpxdDbLoad'] [ORM] Non-optiona
l property startConnected set
<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Non-optiona
l property allowGuestControl set
<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Non-optiona
l property connected set
<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Load: Missi
ng mapping for property hardware.device.capacityInBytes
<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Load: Missi
ng mapping for property hardware.device.storageIOAllocation.reservation
<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Load: Missi
ng mapping for property hardware.device.diskObjectId
<YYYY-MM-DD>T<time>[02976 warning 'utilvpxdDbLoad'] [ORM] Load: Missi
ng mapping for property hardware.device.vFlashCacheConfigInfo.vFlashModule
<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Load: Missi
ng mapping for property hardware.device.vFlashCacheConfigInfo.reservationInMB
<YYYY-MM-DD>T<time> [02976 warning 'utilvpxdDbLoad'] [ORM] Load: Missi
ng mapping for property hardware.device.vFlashCacheConfigInfo.cacheConsistencyTy
pe
</time></time></time></time></time></time></time></time></time></time>

<YYYY-MM-DD>T<time> </time>

[07044 verbose 'Proxy Req 00354'] Connected to nam
ed pipe \\.\pipe\vmware-vpxd-qsadapter-pipe
<YYYY-MM-DD>T<time> [02716 verbose 'vpxdvpxdHostCnx' opID=SWI-3a8447f0
] [VpxdHostCnx::SetLastHeartbeat] Could not set last heartbeat due to unset cnxM
apPath: /appdata/VMware/vpxd/hostCnx/cnxMap/#5236ab0f-acff-96d3-0b9d-1fa26b1f1d9
d/
<YYYY-MM-DD>T<time> [05888 verbose 'QsAdapter.HTTPService.HttpConnecti
on'] User agent is 'VMware vim-java 1.0'
<YYYY-MM-DD>T<time> [04112 verbose 'QsAdapter.HTTPService'] HTTP Respo
nse: Complete (processed 0 bytes)
<YYYY-MM-DD>T<time> [05888 verbose 'Proxy Req 00354'] Server named pip
e \\.\pipe\vmware-vpxd-qsadapter-pipe disconnected
<YYYY-MM-DD>T<time>[05888 verbose 'QsAdapter.HTTPService.HttpConnecti
on'] User agent is 'VMware vim-java 1.0'
<YYYY-MM-DD>T<time> [07044 verbose 'QsAdapter.HTTPService'] HTTP Respo
nse: Complete (processed 0 bytes)
<YYYY-MM-DD>T<time> [05888 verbose 'Proxy Req 00342'] The client close
</time></time></time></time></time></time></time>

d the stream, not unexpectedly.

1. Open the vpxd.cfg file using a text editor.
   
   The vpxd.cfg file is located at:
   
   In vCenter Server 5.5: C:\ProgramData\VMware\VMware VirtualCenter\
   
   In vCenter Server 6.0: C:\ProgramData\VMware\vCenterServer\cfg\vmware-vpx\
   
   
2. Locate the ThreadStackSizeKb parameter within the file. For example, the parameter appears similar to:
   
   Note: Entries within the vpxd.cfg file are case sensitive.
   
   <Config>
   <vmacore>
   <threadPool>
   <ThreadStackSizeKb>512</ThreadStackSizeKb>
   </threadPool>
   </vmacore>
   </Config>
   
   Note: If the entry does not exist, it will need to be added.
   
   
3. Set the value of the ThreadStackSizeKb parameter to 1024. For example:
   
   Note: Entries within the vpxd.cfg file are case sensitive.
   
   <Config>
   <vmacore>
   <threadPool>
   <ThreadStackSizeKb>1024</ThreadStackSizeKb>
   </threadPool>
   </vmacore>
   </Config>
   
   Note: If the service still fails increase the value to 2048.
   
   
4. Save and close the file.