SikulixLibrary for Robot Framework constantly throws the same exception

Nobody has claimed this yet.

On Centos 6, the SikulixLibrary for Robot Framework keeps throwing the following exception:
11078 [qtp11556956098-27] ERROR org.apache.xmlrpc.server.XmlRpcErrorLogger - No such handler: get_keyword_tags

This seems to be thrown with every new test. A quick google of this error in apache tells me that either you aren't giving it the proper method name or not giving it a method at all. While it seems to run ok, it only does so for a while and then it's stability seems to start dropping after about 20-30 tests where it starts mismatching images (as if they're offset consistently) or not finding images it could find a minute ago.

Restarting the server corrects these issues, but it always throws this exception at least once for every test run.

Just a note, we are going to be using this for government testing, telling me to switch to Centos 7 won't help me as the government hasn't approved it as tested yet. That also goes for insisting that I install certain software that isn't tested for Centos 6. If you can find a way to help me get it running on Centos 6 without breaking any of the built in functionality it might be ok, but if it is going to break things like upgrading to Python 2.7 or installing glibc 2.14, It will break the OS without upgrading a significant portion to Centos 7, and that's out of the question. They are also insisting on using Centos over Windows. I'm just an intern, I don't make these decisions.

Start with the SikulixLibrary Robot Framework server and the Apache XML-RPC log entry for get_keyword_tags, then reproduce the run on CentOS 6. Investigate the behavior across 20–30 tests, including image offset and lookup failures; done means the exception is absent and image matching remains stable without restarting the server.

Written by the indexing model from the issue text.