Seems like my primary hard drive on my Mac Pro is about to fail. Better go buy a replacement one tomorrow, it is much easier to replace a hard drive BEFORE it fails even though I have a time machine backup. This is why I believe it is failing...

disk2s2: I/O error.
         0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] 
[ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 6201688] [LBlkNum 128] 
[FSLogMsgID 1593631401] [FSLogMsgOrder First]          0 [Level 3] [ReadUID 0] 
[Facility com.apple.system.fs] [DevNode /dev/disk2s2] [MountPt /] 
[Path /Library/Application Support/iWork '09/Frameworks/SFRendering.framework/Versions/
A/SFRendering] [FSLogMsgID 1593631401] [FSLogMsgOrder Last] 
hfs_clonefile: cluster_read failed - 5

And...

Seeing that this drive has a run time of 19479 hours (or 2.2 years of continuous 24/7 operation) it is not unsurprising.