If you are logged in locally on the server console as root, and used the su - command to change to the Oracle Grid Infrastructure installation owner, then log out of the server, and log back in as the grid installation owner.
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If you are using a VNC client to access the server, then ensure that you are accessing the visual that is assigned to the user that you are trying to use for the installation. For example, if you used the su command to become the installation owner on another user visual, and the xhost command use is restricted, then you cannot use the xhost command to change the display. If you use the visual assigned to the installation owner, then the correct display is available, and entering the xclock command results in the X clock starting on your display.
Verify that there is a DNS entry for the SCAN, and that it resolves to three valid IP addresses. Use the command nslookup scan-name; this command should return the DNS server name and the three IP addresses configured for the SCAN.
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wdt_ID Brief Description of Issue Brief Description of Fix Applicable Product Versions Affected (if known) Link to supplemental Support Article(s) 1 Windows Media Player throws an error "An error occured while playing the file" when attempting to play mp4 videos or "Windows Media Player encountered a problem while playing the file" when attempting to play wmv videos. A new registry DWORD needs to be created within "HKLM\Software\Citrix\HDXMediaStream" for 32-bit machines and "HKLM\Software\Wow6432Node\Citrix\HdxMediaStream" for 64-bit machines. The DWORD name is "UseDefaultRenderers" with a value of "0x1". Citrix XenDesktop 7.6 to 7.13. 2 USB redirection is not working for signature pad. Manufacturers of signature pads may provide additional client and/or server components that need to be loaded in order for signature pad operations to succeed in ICA sessions. For example ePAD provides drivers for the client and server and an ePadLink utility for testing functionality on both the client and VDA. These components may also enable the redirection of signature pads into the VDA session. 3 XenApp 7.6 VMs randomly become unresponsive. A deadlock situation between 2 threads causes this issue. Upgrade the VDA to version 7.8 which contains fix "LC4195". Citrix XenApp 7.6. 4 Citrix Studio reports "The security timestamp is invalid" when browsing Machine Catalogs or Delivery Groups. Resync the clock of each Delivery Controller in the farm using command "w32tm /resync". The default maximum acceptable different in time between a client computer clock and the Domain Controller clock is 5 minutes. 5 VDA failed to uninstall or upgrade because profilemgt_x64.msi failed to uninstall. The error reported is "Installation of MSI File 'profilemgt_x64.msi' failed with code 'InstallFailure' (1603)". This is to be resolved by Citrix. In the meantime, you should as a workaround follow the three steps contained in the CTX article. Citrix XenDesktop 7.6 or 7.6 LTSR. 6 VDA blue screens randomly and all changes on standalone VDA are lost after reboot. Upgrade to XenDesktop 7.14 or later. Otherwise, attach the VDA VHD to another computer, open the System hive, make registry changes noted in CTX article and then detach the VHD. Citrix XenApp 7.11. 7 You receive error "Could not connect to Orchestration Service" after upgrade to XenDesktop 7.15. During the Site upgrade the "OrchDBConnection" and "TrustDBConnection" schema was not created. You must run the failed commands manually to create the Orchestration database connections. Citrix XenDesktop 7.15. 8 Schannel Event IDs 36888 and 36874 are reported on VDAs. These errors appear due to the client and server being unable to communicate correctly, which may be caused by certificate or cipher suite issues. Citrix report that it is safe to ignore these errors. 9 A "1030" error occurs when connecting to a Remote PC connection. Turn off the proxy in Internet Explorer or set "ProxyType" to "None" in default.ica. McAfee Web Gateway was configured as a proxy on the client. This was blocking the ICA connection request from reaching the VDA. This issue could be caused by other proxies too. 10 When connecting to a published desktop from Mozilla Firefox you receive "The connection to ... failed with status (Unknown client error 0)" or "Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix XenApp Server. The Citrix SSL server you have selected is not accepting connections". Download Firefox 53.067 64-bit. It seems that the 32-bit version of Firefox 52.0.2 is not working and causing these errors. Citrix XenDesktop 7.12 and Mozilla Firefox. table.wpDataTable table-layout: fixed !important; table.wpDataTable td, table.wpDataTable th white-space: normal !important; table.wpDataTable td.numdata text-align: right !important;
If you see servers with power state unknown log on to DDC server , open powershell as administrator and paste commands below one by one]asnp Citrix*Get-Service Citrix* Stop-Service -ForceGet-Service Citrix* Start-Service citrix asnp*
You can set up SoftEther VPN Server on a computer in your corporate network. It is recommended to set up VPN Server on a computer which has two network adapters where one is connected to the corporate network and another is connected to global Internet segment. However if you cannot prepare such an ideal server, you can try SoftEther VPN Server on a PC which has only one network adapter to the private network. Because SoftEther VPN Server has Dynamic DNS and NAT-Traversal function, you can reach to such a private PC from the Internet.
Docker - Running COSMOS 5 requires a working Docker installation. Typically Docker Desktop on Windows / Mac. Plain Docker or Podman also works on linux. We actively develop and run with Docker Desktop on Mac/Windows, and Linux on Raspberry Pi, so if you have any issues on another platform, please let us know by submitting a ticket!
One COSMOS server was connected to a high speed telemetry target that was generating telemetry at 10Hz. Another COSMOS server was chained to this and did not need this high speed data. How do you reduce the data rate coming into the chained server?
We can first model the chaining using the COSMOS demo. The format for the cmd_tlm_server.txt file is given in the chaining documentation and already exists in the COSMOS demo. The demo also includes a deconflicting port definition file in system_alt_ports.txt. To start the two server instances from the command line we can type:
Now we need to implement a custom protocol to slow down the telemetry rate on the chained server. Note that the built-in protocols are fully described on the Protocols page and also mentioned on the Interfaces page.
In versions of COSMOS prior to 4.0.0, metadata could be defined in any target / packet combination. In the COSMOS demo we defined metadata in the META target and DATA packet. You would then explicitly tell COSMOS where this metadata was defined by passing the target and packet name to the tools. Here is a example of an old (pre 4.0.0) cmd_tlm_server.txt configuration file:
These items help identify the telemetry being collected by the currently running instance of the COSMOS Server. In fact, every time COSMOS starts a new log file it adds the SYSTEM META packet to the beginning. This behavior was possible prior to COSMOS 4.0.0 but required using the special meta_packet_log_writer in the cmd_tlm_server.txt definition as shown in the first cmd_tlm_server.txt example.
When asked to perform customizations like this I first bring up the COSMOS Demo. We try to include all the COSMOS features in the Demo so end users have concrete examples to follow instead of relying solely on the excellent documentation at cosmosc2.com. Obviously you must first have COSMOS installed so follow the installation instructions and then launch the Demo by running the Launcher in the Demo folder. Here is how the server appears on my Windows machine:
The real work is in implementing how your simulated target is going to behave. This is done in the lib/sim_inst.rb file. Note that whatever you name your simulated target file must match the last parameter of the INTERFACE in the cmd_tlm_server.rb as shown above.
COSMOS now disables reverse DNS lookups by default because they can take a long time in some environments. If you still want to see hostnames when someone connects to a TCP/IP server interface/router then you will need to add ENABLE_DNS to your system.txt file. 2ff7e9595c
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