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Rick Blythe

About Rick Blythe

Social Media Program Manager for VMware, Rick Blythe manages the Twitter handle @vmwarecares and curates the Support Insider Blog. Outside of VMware, he blogs about virtualization at VMwarewolf.com

ALERT: Support for Leap Seconds in VMware Products

VMware Support AlertThe world’s next leap second adjustment is scheduled for 30th of June 2015 at 23:59:60 UTC.

System administrators need to be aware that this may cause issues on NTP synchronized devices and operating systems. For information on Leap Second and its impact on VMware products, please review the KB article-

Support for Leap Seconds in VMware Products (2115818)

Implications of not upgrading your kernel or enabling Time Skew:

Not all customers will be affected, but those who forgo updating VMware Appliance’s operating system kernel or enable time skew may observe the following issues:

  1. First issue that may be observed is the kernel (simplistically, the Linux operating system) can become hung and require a reboot.
  2. The second issue that may be observed is higher than normal CPU consumption on their Linux appliances where JVM's are utilized. In the vCenter Server Appliance (VCVA), this problem can manifest itself as high CPU consumption of the ESX Agent Manager (EAM) and other Java-based processes.

Top 30 Horizon with View KB articles

announcementHorizon View users will enjoy our latest list of top issues. We decided to present 30 this time around. Some you may have seen before, but we've also added new content to the Knowledgebase for View. Have a look and see if you're battling any of these currently.

  1. Generating and importing a signed SSL certificate into VMware Horizon View 5.1/5.2/5.3/6.0 using Microsoft Certreq (2032400)
  2. Manually deleting linked clones or stale virtual desktop entries from the View Composer database in VMware View Manager and VMware Horizon View (2015112)
  3. VMware Products and CVE-2014-3566 (POODLE) (2092133)
  4. Finding and removing unused replica virtual machines in the VMware Horizon View (2009844)
  5. The Event database performance in VMware Horizon View 6.x is extremely slow (2094580)
  6. Restart order of the View environment to clear ADLDS (ADAM) synchronization in View 4.5, 4.6, 5.0, and 5.1 (2068381)
  7. Provisioning View desktops fails due to customization timeout errors (2007319)
  8. View Connection Server reports the error: [ws_TomcatService] STDOUT: java.lang.OutOfMemoryError: Java heap space (2009877)
  9. Pool settings are not saved, new pools cannot be created, and vCenter Server tasks are not processed in a Horizon View environment (2082413)
  10. VMware App Volumes information center (2107821)
  11. Network connectivity requirements for VMware View Manager 4.5 and later (1027217)
  12. Manually deleting replica virtual machines in VMware Horizon View 5.x (1008704)
  13. The View virtual machine is not accessible and the View Administration console shows the virtual machine status as "Already Used" (1000590)
  14. Location of VMware View log files (1027744)
  15. Removing a standard (replica) connection server or a security server from a cluster of connection/security servers (1010153)
  16. Forcing replication between ADAM databases (1021805)
  17. Troubleshooting a black screen when logging into a Horizon View virtual desktop using PCoIP (1028332)
  18. Generating a Horizon View SSL certificate request using the Microsoft Management Console (MMC) Certificates snap-in (2068666)
  19. VMware Horizon View Best Practices (1020305)
  20. Migrating linked clone pools to a different or new datastore (1028754)
  21. Cannot detach a Persistent Disk in View Manager 4.5 and later (2007076)
  22. View Persona Management features do not function when Windows Client-Side Caching is in effect (2016416)
  23. Provisioning View desktops fail with the error: View Composer Fault: VC operation exceeded the task timeout limit set by View Composer (2030047)
  24. Troubleshooting and Frequently Asked Questions for space reclamation in VMware Horizon View 5.2.x and 5.3.x (2039907)
  25. Guidelines for generating and importing an SSL certificate for the View Connection Server for View 5.0.1 and earlier (1008705)
  26. Configuring USB device filters and redirecting Human Interface Devices (HIDs) in View Client (1011600)
  27. Collecting diagnostic information for VMware Horizon View (1017939)
  28. View Manager Admin console displays the error: Error during provisioning: Unexpected VC fault from View Composer (Unknown) (2014321)
  29. Network port diagram for VMware Horizon View 6.x (2085363)
  30. Configuring VMware View Event database on an SQL server fails with the error: An error occurred while attempting to configure the database (1029537)

Top 20 Articles for May 2015

Here is our Top 20 KB list for May 2015. This list is ranked by the number of times a VMware Support Request was resolved by following the steps in a published Knowledge Base article.

  1. VMware ESXi 5.x host experiences a purple diagnostic screen mentioning E1000PollRxRing and E1000DevRx (2059053)
  2. Installing async drivers on VMware ESXi 5.x and ESXi 6.0.x (2005205)
  3. Investigating virtual machine file locks on ESXi/ESX (10051)
  4. Commands to monitor snapshot deletion in VMware ESXi/ESX (1007566)
  5. Determining Network/Storage firmware and driver version in ESXi/ESX 4.x, ESXi 5.x and ESXi 6.x (1027206)
  6. Correlating VMware products build numbers to update levels (1014508)
  7. Unmounting a LUN or detaching a datastore/storage device from multiple VMware ESXi 5.x/6.0 hosts (2004605)
  8. VMware products not affected by CVE-2015-3456, aka VENOM (2117469)
  9. Accessing the vdp-configure or FLR portal page in VMware vSphere Data Protection 5.x and 6.0.x fails in modern versions of Chrome and Firefox (2111900)
  10. Recreating a missing virtual machine disk descriptor file (1002511)
  11. Information about the error: state in doubt; requested fast path state update (1022026)
  12. Broadcom 5719/5720 NICs using tg3 driver become unresponsive and stop traffic in vSphere (2035701)
  13. Snapshot consolidation in VMware ESXi 5.5.x and ESXi 6.0.x fails with the error: maximum consolidate retries was exceeded for scsix:x (2082886)
  14. Decoding Machine Check Exception (MCE) output after a purple screen error (1005184)
  15. Configuring a diagnostic coredump partition on an ESXi 5.x host (2004299)
  16. Unable to delete the virtual machine snapshot due to locked files (2017072)
  17. Using esxtop to identify storage performance issues for ESX / ESXi (multiple versions) (1008205)
  18. vSphere handling of LUNs detected as snapshot LUNs (1011387)
  19. Committing snapshots when there are no snapshot entries in the Snapshot Manager (1002310)
  20. ESXi/ESX hosts with visibility to RDM LUNs being used by MSCS nodes with RDMs may take a long time to start or during LUN rescan (1016106)

Fresh vSphere 6 KB articles!

vSphere 6.0 has been out now for a few weeks and you early adopters have been busy kicking the tires. We've heard some very encouraging things about this release ie: the web client improvements. It's always interesting and top of mind for us to see what issues emerge in everyone's environments and we monitor support requests coming into support as well as social media to see what customers run into.

Here's an fresh list of Knowledgebase articles we've created to address some of these inquiries. Familiarize yourself with the list and of course share with your colleagues using the buttons on this page.

Database compatibility issues during upgrade

Deprecated VMFS volume errors

Backup failures/CBT mem heap issues

Replace certificates for vSphere 6.0

Decommissioning a vCenter Server or Platform Services Controller

ALERT: vSphere Web Client 5.0 fails to load

VMware Support AlertVMware has become aware of an issue with the vSphere Web Client 5.0 failing to load with the error:

RSL Error # of 29
 Error 2046

Note: The RSL Error (# out of 29) number may fail at different values.
Note: This issue only impacts only the usability of the vSphere Web Client 5.0

  • This error occurs regardless of the browser or version used.
  • This is independent of the Adobe Flash version installed.
  • Setting the system clock on an effected system back may allow the vSphere Web Client to work outside of the vCenter Server for a short amount of time.

For further diagnostic and mitigation information refer to KB article: The vSphere Web Client 5.0 fails to load and displays the error: Error # of 29 2046 with RSL (2116567). Any updates to this information will be made in the KB article itself.

ALERT: Virtual Machines on VXLAN Wires may be unable to communicate across hosts with their Edges or Distributed Routers

VMware Support AlertAfter upgrading to VMware ESXi 5.5 Patch 05 (build number: 2702864) with VMware NSX for vSphere 6.1.x your Virtual Machines on VXLAN Wires may be unable to communicate across hosts with their Edges or Distributed Routers.

This is a known issue affecting VMware ESXi 5.5 Patch 5

For further diagnostic and mitigation information refer to KB article: After upgrading to VMware ESXi 5.5 Patch 05, virtual machines using VMware NSX for vSphere 6.1.x is unable to communicate across hosts (2116370)

Any updates to this information will be made in the KB article itself.

Scheduled My VMware Maintenance

MaintenanceMy VMware will be undergoing a scheduled system maintenance on Saturday, April 11th, 2015.  During the time indicated below, you will not be able to place orders or download products.  myLearn login and class registrations will also be restricted.

Begin: 02.00 PM PDT on Saturday, April 11 2015

End:    08.00:PM PDT on Saturday, April 11 2015

We apologize for any inconvenience this creates.

Refresh: Top 20 Horizon with View KB articles

announcementToday we have refreshed our top 20 list of VMware View specific KBs. Some have dropped off the list while others are now trending upward.  Have a look and see if you are encountering any of these issues in View.

 

  1. Manually deleting linked clones or stale virtual desktop entries from the View Composer database in VMware View Manager and Horizon View (2015112)
  2. Pool settings are not saved, new pools cannot be created, and vCenter Server tasks are not processed in a Horizon View environment (2082413)
  3. Generating and importing a signed SSL certificate into VMware Horizon View 5.1/5.2/5.3/6.0 using Microsoft Certreq (2032400)
  4. The time stamp on a snapshot image does not update automatically in VMware Horizon View (2074301)
  5. Network connectivity requirements for VMware View Manager 4.5 and later (1027217)
  6. Manually deleting replica virtual machines in VMware Horizon View 5.x (1008704)
  7. Connecting to the View ADAM Database (2012377)
  8. VMware Horizon View Best Practices (1020305)
  9. Forcing replication between ADAM databases (1021805)
  10. Restart order of the View environment to clear ADLDS (ADAM) synchronization in View 4.5, 4.6, 5.0, and 5.1 (2068381)
  11. Provisioning View desktops fails due to customization timeout errors (2007319)
  12. Generating a Horizon View SSL certificate request using the Microsoft Management Console (MMC) Certificates snap-in (2068666)
  13. Legacy applications fail to start with the VMware View 6.0.x agent installed (2091845)
  14. Troubleshooting a black screen when logging into a Horizon View virtual desktop using PCoIP (1028332)
  15. Resolving licensing errors when deploying virtual Office to a system with Office installed natively (2107369)
  16. Troubleshooting SSL certificate issues in VMware Horizon View 5.1 and later (2082408)
  17. The Event database performance in VMware View 6.0.x is extremely slow (2094580)
  18. Configuring USB device filters and redirecting Human Interface Devices (HIDs) in View Client (1011600)
  19. Finding and removing unused replica virtual machines in the VMware Horizon View (2009844)
  20. PCoIP Disconnection Codes (2012101)

Access Denied - You don't have permission to access ...

We've noticed a number of you who are encountering an error when attempting to access the VMware Knowledgebase, whether it be the main landing page, or a specific article in the KB. You see something like:

Access Denied - You don't have permission to access "http://kb.vmware.com/" on this server.

We are aware of the problem and are investigating the issue on our servers, but in the meantime we want everyone to know the work-around. Go into the menu of the browser you are using and clear both the cookies and the cache.  Then reload the KB URL - it should then work.

We apologize for this inconvenience.

VMware Thinclient FAQ

VMware ThinclientWhat are zero clients and thin clients you ask? No, they’re not skinny customers, they are hardware devices which rely on the server to do most of the work while they serve merely to deliver input and output back and forth for the user.

Our research tells us many of you are wondering about zero clients and thin clients; their differences and function. Read on as we explain your client options for VMware Horizon View.

What’s the difference between a thin client, thick client, and a zero client?

Zero clients have no local storage, operating system or CPU, just a chip that decodes PCoIP at the hardware level and renders the pixels onto the user’s display. Benefits of a zero client include highly efficient energy use, and next to no device management – just configure and deploy.

Thin clients are similar to zero clients on the outside, but contain a CPU, memory, storage and an operating system to make them run.

A thick client would be a regular laptop or desktop, running a standard OS and the software client. These clients of course are the most expensive to run and maintain.

Why would I want a thin or zero client?

  • Extremely efficient energy use.
  • Huge cost savings vs purchasing thick clients.
  • Ease of deployment and management.
  • No data is stored on device so perfect for secure environments.

What are the advantages and disadvantages of these types of clients?

Zero Client

+ Less overhead and maintenance.
- Can be protocol specific, so if you change infrastructures you may need new devices.
- USB devices may become more complicated to use.

Thin Client

+ VPN connectivity options.
+ More supportability for USB devices.
- More software updates than a zero client, but less than a thick client.

What other connection options are out there?

Windows software client

VMware Horizon Client for Windows makes it easy to access your Windows virtual desktop with the best possible user experience on the Local Area Network (LAN) or across a Wide Area Network (WAN).

  • Support for Windows 8 and 8.1 (with Updates) and Windows 7 systems - With Horizon Client 3.3, support for Windows XP and Windows Vista has been discontinued. See What's New.
  • Unmatched performance - The adaptive capabilities of the PCoIP display protocol are optimized to deliver the best user experience, even over low-bandwidth and high-latency connections. Your desktop is fast and responsive regardless of where you are.
  • Simple connectivity - Horizon Client for Windows is tightly integrated with VMware Horizon 6 for simple setup and connectivity.
  • Secure from any location - At your desk or away from the office, your data is delivered securely to you wherever you are. SSL/TLS encryption is always used to protect user credentials, and enhanced certificate checking is performed on the client. Horizon Client for Windows also supports optional RADIUS and RSA SecurID authentication.

Mac software client

Horizon Client for Mac OS X makes it easy to access your Windows-based remote desktop or application from your Mac with the best possible user experience on the Local Area Network (LAN) or across a Wide Area Network (WAN).

  • Support for Mac OS X Snow Leopard (10.6.8), Mac OS X Lion (10.7), Mac OS X Mountain Lion (10.8), Mac OS X Mavericks (10.9), and Mac OS X Yosemite (10.10) - Use a 64-bit Intel-based Mac to work on your Windows-based remote desktop or application.
  • Unmatched performance - The adaptive capabilities of the PCoIP display protocol are optimized to deliver the best user experience, even over low-bandwidth and high-latency connections. Your remote desktop or application is fast and responsive regardless of where you are.
  • Simple connectivity - Horizon Client for Mac OS X is tightly integrated with View for simple setup and connectivity. Quickly reconnect to your remote desktop or application by selecting from up to eight View server shortcuts in Horizon Client.
  • Secure from any location - At your desk or away from the office, your data is delivered securely to you wherever you are. Enhanced certificate checking is performed on the client. Horizon Client for Mac OS X also supports optional RADIUS and RSA SecurID authentication. (RADIUS support was added with VMware View 5.1 and Horizon Client for Mac OS X 1.5 or later.)

Linux software client

VMware Horizon Client for Linux makes it easy to access your Windows virtual desktop from a supported Linux system with the best possible user experience on the Local Area Network (LAN) or across a Wide Area Network (WAN).

  • Support for Ubuntu 12.04 or 14.04, Red Hat Enterprise Linux (RHEL) 6.5, SUSE Linux Enterprise Desktop (SLED) 11 SP3, and CentOS 6.5 - The Horizon Client 3.2 installer provides support for these operating systems.
  • Unmatched performance - The adaptive capabilities of the PCoIP display protocol are optimized to deliver the best user experience, even over low-bandwidth and high-latency connections. Your desktop is fast and responsive regardless of where you are.
  • Simple connectivity - Horizon Client for Linux is tightly integrated with VMware Horizon for simple setup and connectivity.
  • Secure from any location - At your desk or away from the office, your data is delivered securely to you wherever you are. Enhanced certificate checking is performed on the client. Horizon Client for Linux also supports optional RADIUS and RSA SecurID authentication.

HTML Access

HTML Access makes it easy to access your Windows virtual desktop from an HTML 5-based browser; no need to install any software.

  • Access View desktops from device platforms where no native client is available, or from any computer on which you do not want to install software. You can also select HTML Access from a VMware Workspace Catalog.
  • HTML Access is tightly integrated with VMware Horizon 6 for simple setup and connectivity. Open a browser, enter a server URL, and log in to see a list of available View desktops.
  • At your desk or away from the office, your data is always secure. Enhanced certificate checking is performed on the client. HTML Access also supports optional RADIUS and RSA SecurID authentication.