Category: Xenapp

XenApp 6.5 HRP07 environment? if getting exception code Exception Code: 0xc0000005 check out

https://support.citrix.com/article/CTX230529

Last week got the error enclosed in article sure as eggs in our 6.5 environment. Effect came a week after we had moved to hotfix rollup pack 7 – had done UAT for half a week but wasn’t detected.

 

 

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Quick and dirty citrix tip: how to hide Desktop Viewer toolbar

Oftentimes be on a screenshare using webex and the desktop toolbar would “get in the way” at the top. As I don’t need it nearly all the time simplest (but it is a dirty method) approach I took to removing was simply to rename its exe CDViewer.exe – located under c:\program files (x86)\citrix

Does the job 🙂

 

 

 

Trouble getting rid of them really old citrix receiver versions (6.x / 7.x)?

Came across an issue removing some really old citrix clients (version 7.x) in a locked-down environment that was running (ahem) windows vista machines. Had issues upgrading the receivers on the machines.

As these machines had ICA clients using a version that was packaged using installshield they used an EXE file. The method to remove these files was somewhat different than the later MSI method. To remove successfully:

isuninst –f C:\PROGRA~1\Citrix\ICACLI~1\Uninst.isu –c C:\PROGRA~1\Citrix\ICACLI~1\uninstpn.dll –a.

 

Troubleshooting HTML5 receiver issues

Recently in the lab updated the HTML5 receiver (version 2.3) on my storefront servers. After which hit issues with my connection going “in and out”.

Turns out my patching wasn’t up to scratch. XenApp 6.5 environment and moving hotfix rollup pack 7 (per CTX129229) resolved the issue.

What was instructive was enabling HTML5 logging per https://support.citrix.com/article/CTX217352

What did help me gather from it was it was session reliability-related. Sure enough when I switched it off all worked. Ultimately though did want to leave enabled so updating to latest HRP resolved but the HTML5 logging was very useful on this occasion as reasonably negligible so a good takeway

 

Getting “Aw, Snap!” on launch of google chrome in citrix environments?

See plenty of pain on this one in the field. Not quite sure what is going on with chrome as seen as same from my own machine.

Anyways in order to circumvent message below which is what greets you launch simply need to do the following:

C:\Program Files (x86)\Google\Chrome\Application\chrome.exe” –no-sandbox –disable-infobars –disable-gpu

 Editing the shortcut is the simple method. Use shift+right click to edit the one on the taskbar. Sure there is noise in the forums on this but been busy to check what root cause is/ultimate fix but above should get you over the hump for now.

 

 

Citrix tip: getting WMI CPU spikes on certain VDA’s?

On a certain batch of VDA’s we had running in an environment here they were running 2 versions back (7.11) from current version on our delivery controllers (7.13) noticed tickets coming in relating to general sluggishness with performance. Ops teams did some digging and noticed it was related to WMIprvse.exe. Seen this in the past and wondered if a similar fix adopted to same issue we’d seen in XenApp 6.5 would work.

Sure enough did the trick.

Issue related to performance counters.

Fix:

On a “happy” VDA (eg one chugging along nice and quiet from a CPU perspective)

export the performance counters

c:\ lodctr.exe /S:C:\counters.txt

On the “unhappy” VDA’s import the counters in

c:\ lodctr.exe /R:C:\counters.txt