[CR #611876] When the ERSSD is being defragmented using the sysadmin erssd command and the defrag parameter, and the Stable Queue Transaction (SQT) thread tries to access it, the SQT thread fails and this error is stored in the log file.
"SQT (103:1) could not get sqm_reader=8"
This also causes the distributor to shutdown.
Workaround: Wait until the defragmentation process finishes and then resume the distributor.
