It is completely possible for a system to appear stable in normal daily use and still have memory or disk issues that prevent SWTOR from patching.
That said, these errors can ultimately lead to general system or data corruption so getting them fixed is in your best interest if you are affected.
“Reliable source serving corrupt data” in Logs (Non-Streaming Only) If you receive “Reliable source serving corrupt data” errors in your logs, this is also indicative of file corruption.
After some bad data released to the Content Delivery Networks (CDNs) in late December 2011, we put additional systems in place to safeguard and monitor patch servers for corrupt data.
Anti-virus software Anti-Virus software can also cause issues launching the game.
There are a number of different anti-virus software variations out there, so we’ve included some general steps below that might help: If you are unsure on how to do either of the above steps then you should contact the manufacturer of your anti-virus software.
If that doesn't work: Try to reinstall Minecraft for the Curse client.
If you’re unable to update the Launcher you’ll need to either use the Launcher Repair Utility or disable your anti-virus software while the Launcher updates itself and then immediately enable it thereafter. Retrying…” (Non-Streaming Only) This indicates that the Launcher is unable to download data from the patch servers.In a default installation these files can be found here: I. Some anti-virus software will cause the Launcher not to be able to update itself. This new technology brings with it some new troubleshooting steps, so you need to first determine which patching technology you’re using. This is the cogwheel in the lower left corner of the client. You can do this by following our guide that explains step by step what you need to do. You will need to open Curse, and head to the Settings. This is a different procedure than that for the normal MC client.
Search for updating launcher:
All instances of this error since that time have been traced to in-memory corruption of the downloaded patch data.