Okay: Andy H. has merged xrootd/xrootd br. master -> xrootd/xrootd br. xrdssi, picking up among other things a fix that may be related to the HandleIncMsgJob::Run bug mentioned above.
I have rebased lsst/xrootd br. master on top of the latest xrootd/xrootd br. xrdssi, pushed, and tagged as xrdssi-1.0.4.
Tomorrow morning John will get the czar fixes we have been running with up for review. If we get those reviewed and merged then we can all be running on the same page from lsst/qserv br. master and lsst/xrootd br. master. If we can no longer see this bug (I am hopeful – it has looked quite good on my machine) then we'll claim victory.
Standing by and awaiting John Gates reviews/merges...